3570 Positioners Instruction Manual D200137X012 September 2011 � Fisher 3570 Pneumatic Valve Positioners Figure 1. Fisher 3570 Positioner Mounted on Contents 470 Actuator Introduction ................................. 1 Scope of Manual ............................. 1 Description ................................. 2 Valve Positioner Type Numbers ............. 2 Specifications ............................... 4 Educational Services ......................... 4 Installation, Mounting, and Connections .......... 5 Installation ................................. 5 Diagnostic Test Connections (Optional) ..... 6 Connections ................................ 7 Piping Sizes ............................. 7 Vent ................................... 8 Supply Pressure Connections .............. 9 Cylinder Connections .................... 10 Instrument Connection .................. 10 Operating Information ........................ 11 Initial Adjustments .......................... 11 Signal Range Codes ......................... 11 Frequency Response ........................ 12 Adjustment Procedures ...................... 14 Changing Positioner Action .................. 17 Split Range Operation ....................... 19 Initial Range Spring Extension Procedure for 3570P and 3570PC Positioners .......... 19 W5566*/IL Principle of Operation ........................ 21 3570, 3570C, 3570P, 3570PC, and 3571 Valve Positioners .................... 21 3572 and 3576 Valve Positioners .............. 22 3573 and 3577 Valve Positioners .............. 23 Bias Spring ................................ 29 Relay Operation ............................ 24 Disassembly ........................... 29 Maintenance ................................ 25 Assembly .............................. 29 Troubleshooting ............................ 26 Parts Ordering ............................... 29 Converting a 3570 Valve Positioner to a Parts Kits ................................... 30 3570C Valve Positioner .................... 27 Positioner Repair Kits ........................ 30 Range Spring .............................. 28 Diagnostic Test Connection Kits ............... 30 Disassembly ........................... 28 Parts List ................................... 30 Assembly .............................. 28 Positioner Common Parts .................... 30 Introduction Scope of Manual This manual provides installation, operation, adjustment, maintenance, and parts ordering information for Fisher 3570 pneumatic valve positioners. The various product types within this series are described later in this manual. Refer www.Fisher.com 3570 Positioners Instruction Manual September 2011 D200137X012 to figure 1 for a typical mounting of a 3570 positioner. Refer to separate instruction manuals for information concerning the actuator, valve, and accessories. Do not install, operate or maintain a 3570 positioner without being fully trained and qualified in valve, actuator, and accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important to carefully read, understand and follow all the contents of this manual, including all safety cautions and warnings. If you have any questions about these instructions, contact your Emerson Process Management sales office before proceeding. Description 3570 pneumatic valve positioners are used with control valve assemblies to provide an accurate valve stem position that is proportional to the input signal received from a control device. The input signal range can be 0.2 to 1.0 bar (3 to 15 psig), 0.4 to 2.0 bar (6 to 30 psig), or another pneumatic input signal range, as required. These positioners are normally used with pneumatic piston actuators. However, product types within the 3570 family can be used with pneumatic, long‐stroke, cylinder actuators or with pneumatic diaphragm actuators. Valve Positioner Type Numbers 3570 — Pneumatic valve positioner with two relays for use with Fisher 470 and 480 pneumatic piston actuators. See figure 4. The positioner includes three pressure gauges to monitor input signal, relay output pressure to the top of the actuator cylinder, and relay output pressure to the bottom (piston underside) of the actuator cylinder. The 3570 positioner is mounted on the top of the actuator cylinder. The actuator stem position feedback is provided through extension of the range spring attached to the actuator piston rod. 3570C — Pneumatic valve positioner with automotive tire valves instead of pressure gauges. Tire valves can be used for clip‐on test pressure gauges. The relay nozzles are locked in place with locknuts to resist unwanted nozzle movement due to vibration. 3570P — Pneumatic valve positioner with two relays for use with Fisher 490 pneumatic piston actuators. The positioner includes three pressure gauges to monitor input signal, relay output pressure to the top of the actuator cylinder, and relay output pressure to the bottom (piston underside) of the actuator cylinder. The 3570P positioner is mounted alongside the actuator cylinder. Actuator stem position feedback is provided from the actuator‐valve stem connector through a cable and spool assembly. 3570PC — Pneumatic valve positioner with automotive tire valves instead of pressure gauges. Tire valves can be used for clip‐on test pressure gauges. The relay nozzles are locked in place with locknuts to resist unwanted nozzle movement due to vibration. 3571 (Discontinued)— Pneumatic valve positioner with two relays for use with long‐stroke cylinder actuators. The positioner includes three pressure gauges to monitor input signal, relay output pressure to the top of the actuator cylinder, and relay output pressure to the bottom (piston underside) of the actuator cylinder. The 3571 positioner is bracket‐mounted to the side of the actuator. Actuator stem position feedback is provided through a wire from the actuator‐valve stem connector. 3572 — Pneumatic valve positioner with one relay. The 3572 positioner is normally used on the 472 pneumatic piston actuator mounted on valve bodies having push‐down‐to‐open (PDTO) action. The positioner includes two pressure gauges to monitor input signal pressure and relay output pressure to the top of the actuator cylinder. The 3572 positioner is mounted on the top of the actuator cylinder. Actuator stem position feedback is provided through an extension of the actuator piston rod. 2 3570 Positioners Instruction Manual D200137X012 September 2011 Table 1. Specifications Available Configurations Supply Pressure Maximum: 10.4 bar (150 psig) See the positioner type number descriptions given above. Minimum: 2.4 bar (35 psig) Supply Medium Input Signal (2) Air or Natural gas Standard Ranges: 0.2 to 1.0 bar (3 to 15 psig) or 0.4 to 2.0 bar (6 to 30 psig) Optional Ranges: As desired, within the limits of the (3) bellows Steady‐State Air Consumption Split Ranges: Use one‐half of either standard range 3 0.54 normal m /h (20 scfh) with 6.9 bar (100 psig) when two control valves are operated by one supply pressure output signal form a single control device (1) Operative Ambient Temperature Limits Output Signal With Nitrile O‐Rings and Diaphragms: –34 to 71°C Type: Pneumatic pressure as required to maintain (–30 to 160°F) the correct valve stem position and seat load With Fluorocarbon O‐Rings and Diaphragms Action: Field‐reversible between direct and reverse (Optional): 0 to 104°C (32 to 220°F) (1) Hazardous Area Classification Resolution Complies with the requirements of ATEX Group II 0.2% of instrument pressure span Category 2 Gas and Dust (1) Repeatability 0.3% of total stroke or instrument pressure span Options (1) Frequency Response � Restrictor (high‐frequency filter for bellows) See figure 5 Approximate Weight Pressure Connections 2.7 kg (6 pounds) without optional mounting bracket or actuator/valve assembly Vent: 3/8 NPT All others: 1/4 NPT Declaration of SEP Fisher Controls International LLC declares this Pressure Indications product to be in compliance with Article 3 3570C and 3570CP Positioners: Tire valves accept paragraph 3 of the Pressure Equipment Directive standard pressure gauge chucks (gauges not (PED) 97 / 23 / EC. It was designed and supplied) manufactured in accordance with Sound All Other Types: Gauges supplied per table 3 Engineering Practice (SEP) and cannot bear the CE marking related to PED compliance. Bellows Pressure Rating However, the product may bear the CE marking to Standard Bellows: 3.4 bar (50 psig) indicate compliance with other applicable European Optional Bellows: 6.2 bar (90 psig) Community Directives. NOTE: Specialized instrument terms are defined in ANSI/ISA Standard 51.1 - Process Instrument Terminology. 1. For a 3570 or 3570C positioner mounted on a 470 or 480 actuator. Values do not apply to other constructions or actuator‐valve combinations. 2. Natural gas should not contain more than 20 ppm of H S. 2 3 3. m /h at 0°C, 1.01325 bar, absolute (Scfh at 60°F, 14.7 psia). 3 3570 Positioners Instruction Manual September 2011 D200137X012 Table 2. Action Under Normal Operating Conditions (1) DESIRED PISTON MOTION POSITIONER ACTION Down Up Direct‐acting Increasing input signal pressure to bellows Decreasing input signal pressure to bellows Reverse‐acting Decreasing input signal pressure to bellows Increasing input signal pressure to bellows 1. Supply pressure is routed through relays to piston. Table 3. Pressure Indications NUMBER OF GAUGES SUPPLIED (1) PRESSURE MONITORED STANDARD GAUGE RANGE Two‐Relay One‐Relay Positioner Positioner 0‐30 psi/0‐0.2 MPa/0‐2 bar or Positioner input signal pressure 1 1 0‐60 psi/0‐0.4 MPa/0‐4 bar Cylinder (relay output) pressure 2 1 0‐160 psi/0‐1.1 MPa/0‐11 bar 1. For gauges marked in other units and ranges, consult your Emerson Process Management sales office. 3573 — Pneumatic valve positioner that is similar to The 3572 positioner with the relay output pressure piped to the bottom (piston underside) of the actuator cylinder. The 3573 positioner is normally used on the 473 pneumatic piston actuator with valve bodies having push‐down‐to‐close (PDTC) action. 3576 (Discontinued)— Pneumatic valve positioner with one relay for use on direct‐acting pneumatic diaphragm actuators that require high operating pressures. The 3576 positioner includes two pressure gauges to monitor input signal pressure and relay output pressure to the top of the actuator diaphragm. The 3576 positioner is bracket‐mounted to the actuator yoke. Actuator stem position feedback is provided through a wire from the actuator‐valve stem connector. 3577 (Discontinued)— Pneumatic valve positioner that is similar to 3576 positioner with the relay output pressure piped to the underside of the actuator diaphragm on reverse‐acting pneumatic diaphragm actuators. Specifications Specifications for 3570 positioners are listed in table 1. Educational Services For information on available courses for 3570 positioners, as well as a variety of other products, contact: Emerson Process Management Educational Services, Registration P.O. Box 190; 301 S. 1st Ave. Marshalltown, IA 50158-2823 Phone: 800-338-8158 or Phone: 641-754-3771 FAX: 641-754-3431 e‐mail: education@emerson.com 4 3570 Positioners Instruction Manual D200137X012 September 2011 Installation, Mounting, and Connections Installation WARNING � Always wear protective clothing, gloves, and eyewear when performing any installation operations to avoid personal injury. � Personal injury or property damage may result from fire or explosion if natural gas is used as the supply medium and preventive measures are not taken. Preventive measures may include, but are not limited to, one or more of the following: Remote venting of the unit, re‐evaluating the hazardous area classification, ensuring adequate ventilation, and the removal of any ignition sources. For information on remote venting of this positioner, refer to page 8. � Check with your process or safety engineer for any additional measures that must be taken to protect against process media. � If installing this into an existing application, also refer to the WARNING at the beginning of the Maintenance section of this instruction manual. The positioner is usually mounted on the actuator at the factory. However, if the positioner and actuator are ordered separately, it is necessary to mount the positioner on the actuator. Before mounting the positioner, be certain the O‐ring (key 33, figure 11) is in place in the cylinder (top connection) in the base of the positioner. For appropriate actuator/positioner combinations, refer to the positioner type number descriptions given earlier in this instruction manual. � For 3570, 3570C, 3572, and 3573 positioners, mount the positioner with two cap screws (key 32, figure 11). If the range and bias springs are not installed in the positioner, refer to the range spring and bias spring procedures in the Maintenance section. Insert the threaded end of the spring retainer (key 19, figure 2) into the center of the range spring (see figure 2). Then, insert a screwdriver into the center of the range spring and extend the spring until the spring retainer can be screwed into the top of the actuator piston rod extension. Tighten the spring retainer into the top of the actuator piston rod extension. If the range spring and/or bias spring is not installed in the positioner, refer to the procedures for either spring in the Maintenance section. � For 3570P and 3570PC positioners, attach the positioner extension and positioner to the cylinder mounting plate with the two cap screws (key 100, figure 14). Make the required pressure connections as described in the following procedure. Go to the initial range spring extension procedures for 3570P and 3570PC positioners. � For 3571, 3576, and 3577 positioners, insert two cap screws through the holes in the mounting bracket (key 55, figure 13) to attach the positioner to the actuator mounting boss. Attach the hex drive stud to the actuator‐valve stem connection. Attach the end bearing (key 56E, figure 13) to the hex drive stud. 5 3570 Positioners Instruction Manual September 2011 D200137X012 Figure 2. Bias and Range Springs for Zero and Span Adjustments BELLOWS SPRING LOCK BEAM TRAVEL STOP (E‐RING) BIAS SPRING POST BEAM BIAS SPRING RANGE SPRING (KEY 18) ZERO ADJUSTMENT SPRING RETAINER (KEY 19) LOCKNUTS SPRING RETAINER SPACER (IF REQUIRED) (KEY 235) PISTON ROD EXTENSION (OPTIONAL) EFFECTIVE LENGTH EFFECTIVE LENGTH OVERALL LENGTH SPRING SPRING RETAINER SPACER RETAINER NOTE: BOTTOM OF BIAS SPRING POST THREAD MUST BE POSITIONED AS SHOWN FOR PROPER POSITION OF E‐RING TRAVEL STOPS. AJ7270‐C 1H8907‐C 1J2233‐C B2402/IL Diagnostic Test Connectors (Optional) Diagnostic test connectors are available from the factory, when the unit is ordered, or they can be installed on an existing control valve assembly in the field. These connectors are especially useful for “quick” connections when using the FlowScanner� valve diagnostic system. The FlowScanner is a portable, microprocessor‐based diagnostic and calibration system specifically designed for use with pneumatically‐operated control valves. To support diagnostic testing of the control valve assembly, the connectors, piping, and other hardware can be installed between the 3570 positioner and the actuator. A typical connector installation is shown in figure 3. For connectors, refer to the FlowScanner Diagnostic Connection kit listing in the parts list. The hardware used includes 3/4 NPT pipe nipple, pipe tee, and pipe bushings with a 1/8 NPT pipe bushing for the connector. The connector consists of 1/8 NPT body and body protector (see figure 3). 1. Before assembling the pipe nipple, pipe tee, pipe bushings, actuator piping, and connector body, apply sealant to all threads. 2. Position the pipe tee, connector body, and body protector for easy access when doing diagnostic testing. 6 3570 Positioners Instruction Manual D200137X012 September 2011 Figure 3. Diagnostic Test Connections PIPE NIPPLE TO INSTRUMENT CONNECTION PIPE NIPPLE 3570 BODY PROTECTOR POSITIONER TO SUPPLY CONNECTION BODY PIPE BUSHING FROM 377 TRIP VALVE PIPE NIPPLE 377 TRIP VALVE TO BOTTOM (OPTIONAL) CYLINDER PIPE TEE ACTUATOR GAUGE STEM REQUIRED WHEN 12B8044‐A PURCHASED WITH GAUGE A6112/IL Connections Piping Sizes All pressure connections on 3570 positioners are 1/4 NPT (internal). Use 3/8‐inch pipe or tubing for supply, cylinder (bottom connection), and instrument (input signal) connections. For the remote vent pipe, if one is required, use 19 mm (3/4‐inch) (minimum inside diameter) pipe for runs up to 6.09 meters (20 feet). For vent piping runs from 6.09 to 30.5 meters (20 to 100 feet), use 25.4 mm (1‐inch) (minimum inside diameter) pipe. Refer to figure 4 for the locations and sizes of connections. 7 3570 Positioners Instruction Manual September 2011 D200137X012 Figure 4. Typical Location of Fisher 3570 Positioner Parts and Adjustments BELLOWS RANGE SPRING CLEAN‐OUT (SPAN ADJUSTMENT) PLUNGER VERTICAL CYLINDER RELAY BOTTOM HORIZONTAL PRESSURE RELAY INSTRUMENT SUPPLY PRESSURE CONNECTION (NOT SHOWN) (1/4 NPT) RELAY NOZZLE (OUTPUT PRESSURE 1 ADJUSTMENT) INSTRUMENT CYLINDER VENT CONNECTION (TOP CONNECTION) CONNECTION CYLINDER (BOTTOM BELLOWS POSTS 3/8 NPT (INPUT SIGNAL) (O‐RING, KEY 33) CYLINDER CONNECTION) (1/4 NPT) (1/4 NPT) TOP PRESSURE ZERO ADJUSTMENT BACK VIEW W4025*/IL FRONT VIEW W4027*/IL NOTES: ON SOME CONSTRUCTIONS, TWO NOZZLES AND ADJUSTMENTS ARE REQUIRED. 1 Vent WARNING Personal injury or property damage could result from fire or explosion of accumulated gas, or from contact with hazardous gas, if a flammable or hazardous gas is used as the supply pressure medium. The positioner/actuator assembly does not form a gas‐tight seal, and flammable or hazardous gas could leak from the assembly. Therefore, if the assembly is enclosed install a remote vent line from the enclosure. However, a remote vent pipe alone cannot be relied upon to remove all hazardous gas. Use adequate ventilation, and necessary safety measures. Vent line piping should comply with local and regional codes and should be as short as possible with adequate inside diameter and few bends to reduce case pressure buildup. CAUTION When installing a remote vent pipe, take care not to overtighten the pipe in the vent connection. Excessive torque will damage the threads in the connection. Note The vent connection is always plugged with a pipe plug for 3570P and 3570PC positioners when mounted on 490 actuators. 8 3570 Positioners Instruction Manual D200137X012 September 2011 The connection marked VENT (see figure 4) should be left open if the actuator is installed in the vertical position. However, the vent must be protected against the entrance of any foreign material that could plug it. Check the vent periodically to be certain it is not plugged. If the actuator is mounted in other than the vertical position, be sure there is a vent and drain at the lowest point of the positioner. To do this, remove the pipe plug (key 36, figure 11) from the cover. Then, position the cover in such a way that the hole in the cover is at the lowest point. Plug the vent connection because the positioner is now vented through the cover. Note A remote vent is not possible with 3570P, 3570PC, 3571, 3576, and 3577 positioners. If a remote vent is required, the vent line must be as short as possible with a minimum number of bends or elbows. Vent line piping should have a minimum inside diameter of 19 mm (3/4‐inch) for runs up to 6.09 meters (20 feet) and a minimum inside diameter of 25.4 mm (1‐inch) for runs from 6.09 to 30.5 meters (20 to 100 feet). Supply Pressure Connections WARNING Personal injury or property damage may occur from an uncontrolled process if the supply medium is not clean, dry, oil‐free air, or noncorrosive gas. While use and regular maintenance of a filter that removes particles larger than 40 micrometers in diameter will suffice in most applications, check with an Emerson field office and industry instrument air quality standards for use with corrosive air or if you are unsure about the proper amount or method of air filtration or filter maintenance. WARNING To avoid personal injury or property damage resulting from the sudden release of pressure, do not install the valve assembly where service conditions could exceed the limits given in this manual or on the appropriate nameplates. Use pressure‐relieving devices as required by government or accepted industry codes and good engineering practices. WARNING If the supply pressure medium is corrosive, make sure the tubing and instrument components that contact the corrosive medium are of suitable corrosion‐resistant material. The use of unsuitable materials might result in personal injury or property damage due to the uncontrolled release of the corrosive media. The connection marked SUPPLY (see figure 4) must be provided with clean, dry air or a noncorrosive gas. Install a 40‐micrometer filter and suitable equipment to dry the supply medium. Establish a maintenance cycle to ensure that the regulator and filter are working correctly. CAUTION The maximum allowable supply pressure to prevent damage to the components of the positioner, actuator, and valve is normally stamped on the actuator nameplate. Use a suitable supply pressure regulator to reduce the supply pressure source to the value stamped on the nameplate. 9 3570 Positioners Instruction Manual September 2011 D200137X012 If this maximum supply pressure value is not available, use a supply pressure that does not exceed any of the following: � The maximum supply pressure for the positioner as shown in table 1. � The maximum pressure rating of the actuator, from the appropriate actuator instruction manual. � The maximum allowable valve plug stem load for the specific valve body assembly being used. Contact your Emerson Process Management sales office for valve plug stem load information, if required. � For diaphragm actuators, refer to the actuator instruction manual for the recommended supply pressure and use the larger value of the range listed. The recommended supply pressure for use with piston actuators is the highest available supply pressure between 3.4 bar (50 psig) and the maximum limit determined by the actuator and positioner specifications. Selecting the highest pressure within the limits will minimize load error and will maximize stroking speed and thrust. For the lowest supply pressure that will assure satisfactory performance, the factors of valve plug unbalance force, valve plug seating force, and frictional force must be considered in the following relationship: (Valve (Seating (Frictional unbalance, + + force, force, ] Supply [ + 0.7 bar kg) kg) kg) pressure, = 98 bar (Area of the actuator piston, in square mm) or (Valve (Seating (Frictional + unbalance, force, + force, ] [ Supply + 10 psig pounds) pounds) pounds) pressure, = psig (Area of the actuator piston, in square inches) Consult your Emerson Process Management sales office for the appropriate values for specific actuators, valves, and service conditions. The 0.7 bar (10 psig) is added to the equation to account for an approximate 0.7 bar (10 psi) differential pressure loss in the positioner. For spring‐return piston actuators, the pressure required to compress the actuator spring completely must also be considered. Cylinder Connections 1. The connection marked CYLINDER (see figure 4) is connected at the factory to the lower part of the cylinder (bottom) or to the lower diaphragm casing if the positioner is used with a pneumatic diaphragm actuator. 2. The cylinder top connection is a pressure passage located in the bottom of the positioner base (key 1, figure 11). On 3570 and 3570C positioners, an O‐ring (key 33, figure 11) is used between the bottom of the positioner and the top of the actuator. On 3570P, 3570PC, 3571, 3576, and 3577 positioners, a mounting bracket (key 55, figure 13) is required. This mounting bracket connects to the bottom of the base. An O‐ring (key 33, figure 11) is placed between the base and mounting bracket. This mounting bracket provides a 1/4 NPT connection for the positioner output. This connection is made at the factory if the positioner is ordered mounted to the actuator or if the mounting bracket is installed. Instrument Connection The connection marked INSTRUMENT (see figure 4) connects to the output signal connection of the control device. The positioner operates only on a pneumatic input signal; the input signal range is marked on the nameplate (key 23, 10 3570 Positioners Instruction Manual D200137X012 September 2011 figure 11). The maximum allowable input signal for positioners with standard or optional bellows is in table 1 (bellows pressure rating). The instrument connection is made at the factory when a complete control valve assembly with a valve‐mounted control device is ordered. Otherwise, make field connections to the positioner from an appropriate control device. Refer to table 1 and the nameplate for input signal pressure ranges. Operating Information Initial Adjustments Normally, no adjustments are necessary upon initial installation. The positioner is set at the factory for the travel, input signal range, and action specified in the order. Adjustment is necessary when operating conditions are changed, when the unit has been dismantled and reassembled, or when the control valve travel does not correspond to the desired input signal range. If the operating conditions have not changed but the positioner requires adjustment, refer to the adjustment procedures in this section. If the operating conditions have changed, first, refer to the signal range code descriptions, then, refer to the adjustment procedures. Signal Range Codes The range spring and the bias spring are matched to a specific input signal range and length of travel. Also, the spring retainer length is matched to the application on the 3570, 3570C, 3572, and 3573 positioners. Refer to figure 2 for location of parts. The signal range codes in table 4 are based on the following applications: � Codes for valve travels up to and including 50 mm (2 inches) are used for actuators that have a 50 mm (2 inch) maximum travel. If the actuator maximum travel is greater than 50 mm (2 inches), an additional retainer spacer (key 235, see figure 2) is required. Refer to the parts list for the additional spring retainer spacer (key 235) part number. � Codes for valve travels greater than 50 mm (2 inches), up to and including 105 mm (4‐1/8 inches), are used for actuators that have a 105 mm (4‐1/8 inch) maximum travel, except the 480‐12 or 480‐15 Size 20 actuators which have a 54 mm (2‐1/8 inch) maximum travel. If the actuator maximum travel is greater than 105 mm (4‐1/8 inches), an additional retainer spacer are required. Refer to the parts list for the additional spring retainer spacer (key 235) part numbers. � Codes for valve travels greater than 105 mm (4‐1/8 inches), up to and including 206 mm (8‐1/8 inches), are for actuators that have a 206 mm (8‐1/8 inch) maximum travel. If the valve travel is 105 mm (4‐1/8 inches) or less, two additional spring retainer spacers are required. Refer to the parts list for the additional spring retainer spacer (key 235) part numbers. If the input signal range and travel do not match any of the selections in table 4, consult your Emerson Process Management sales office for information. To change the springs, refer to the range and bias spring procedures in the Maintenance section. From table 4, select the signal range that matches your application. Find the travel length for the application under the signal range selected, then use the code (from the direct or reverse column) that matches the direct or reverse operation of the positioner. The first number in the code is used to identify the range spring, the letter in the code is used to identify the bias spring, and the second number (after the letter) is used to identify the spring retainer. For example, from table 4, for a 11 3570 Positioners Instruction Manual September 2011 D200137X012 signal range of 0 to 1.0 bar (0 to 15 psig), an actuator travel of 14.3 mm (9/16‐inch), and direct action, the signal range code from table 4 is 6G3. The “6” indicates the range spring. The “G” indicates the bias spring. The “3” indicates the spring retainer. Note It is necessary to add the bias spring seat (key 8) to a unit when changing from an extension type spring (key 9) to a compression type spring (key 48). When planning to change the bias spring in an existing unit, inspect the unit first to determine if the current bias spring is an extension type spring (key 9) or a compression type spring (key 48). To change from an extension type spring to a compression type spring, it is necessary to add the bias spring seat (key 8). Refer to the appropriate procedures in the Maintenance section of this manual. In some cases, it is necessary to add an additional spring retainer spacer or change from the standard bellows to the optional high pressure bellows. Table 4 footnotes indicate the use of an additional spring retainer spacer or high pressure bellows. Use the code from table 4 while referring to tables 5, 6, and 7 to determine the part numbers for the range spring, bias spring, and spring retainer. Unless otherwise specified, use the standard bellows. Also, no spring retainer spacer is required unless the spacer is specified in the footnotes of table 4. Frequency Response Figure 5 shows how a 3570 or 3570C positioner with 470 or 480 actuator responds when the input signal pressure is cycled at a small amplitude (3 to 5 percent), and at an increasing frequency. Assume the cycling input signal and the movement of the actuator rod are represented by sine waves. As the actuator rod is forced to move faster, its motion begins to fall behind the input signal in both time (shown as phase lag) and amplitude (shown as normalized gain). Figure 5. Typical Frequency Response for a Fisher 3570 or 3570C Positioner Mounted on a 470 or 480 Actuator 1. SIZE 30—19 mm (3/4 INCH) TRAVEL�4. SIZE 80—51 mm (2 INCH) TRAVEL 2. SIZE 40—38 mm (1‐1/2 INCH) TRAVEL 5. SIZE 100—51 mm (2 INCH) TRAVEL 3. SIZE 60—38 mm (1‐1/2 INCH) TRAVEL 6. SIZE 130—76 mm (3 INCH) TRAVEL 2K5255‐R A1285‐2/IL 12 3570 Positioners Instruction Manual D200137X012 September 2011 (1) Table 4. Fisher 3570 Signal Range Codes SIGNAL RANGE SIGNAL RANGE SIGNAL RANGE SIGNAL RANGE 0 to 1.0 bar (0 to 15 psig) 0.2 to 0.6 bar (3 to 9 psig) 0.2 to 1.0 bar (3 to 15 psig) 0.2 to 1.0 bar (3 to 15 psig) Travel Code Travel Code Travel Code Travel Code mm Inches Direct Reverse mm Inches Direct Reverse mm Inches Direct Reverse mm Inches Direct Reverse (3) 54 2‐1/8 4G1 4B1 14.3 9/16 6G3 6D3 66.7 2‐5/8 15G13 15A13 (8) 190.5 7‐1/2 19G5 19C5 54 2‐1/8 4G8 4B8 17.5 11/16 2G4 2G4 76.2 3 14G8 14A8 193 7.6 19G8 19C8 19 3/4 7A1 7C1 79.4 3‐1/8 14G8 14A8 196.6 7‐3/4 19G3 19B3 55.6 2‐3/16 9G3 9B3 20.6 13/16 7G1 7B1 82.6 3‐1/4 14G8 14A8 198.9 7‐13/16 19G8 19B8 57.1 2‐1/4 9G3 9B3 26.2 1‐1/32 5A12 5D12 85.7 3‐3/8 14G8 14A8 (3) 203.2 8 19G8 19B8 58.7 2‐5/16 9G2 9B2 206.4 8‐1/8 19G12 19B13 59.5 2‐11/32 9G3 9B3 60.3 2‐3/8 9G3 9B3 28.6 1‐1/8 5C8 5C8 88.9 3‐1/2 14G8 14A8 SIGNAL RANGE 30.2 1‐3/16 12A13 12C13 96.8 3‐13/16 14G8 14A8 0.2 to 1.8 bar (3 to 27 psig) 38.1 1‐1/2 8G5 8B5 101.6 4 14G8 14A8 63.5 2‐1/2 9G3 9B3 39.7 1‐9/16 8G12 8B12 104.8 4‐1/8 13G8 13A8 (2) 66.7 2‐5/8 9B3 9B3 44.5 1‐3/4 8G5 8A5 117.5 4‐5/8 13G3 13A3 9.5 3/8 10A2 10D2 68.3 2‐11/16 9G10 9B10 11.1 7/16 10A2 10D2 69.9 2‐3/4 9G10 9B10 15.9 5/8 3A2 3D2 73 2‐7/8 9G5 9B5 (3) 19 3/4 11A4 11D4 50.8 2 8G5 8A5 127 5 13G4 13A4 22.2 7/8 11A5 11D5 79.4 3‐1/8 9A3 9B3 152.4 6 13G3 13A3 101.6 4 9A12 9B12 165.1 6‐1/2 13G3 13A3 104.8 4‐1/8 9G1 9B1 74.6 2‐15/16 9G5 9B5 177.8 7 13G8 13A8 76.2 3 9G12 9A12 127 5 21B8 21D8 203.2 8 18G8 18A8 25.4 1 2C5 2C5 78.5 3.09 9G8 9B8 206.4 8‐1/8 18G8 18A8 28.6 1‐1/8 2A5 2D5 79.4 3‐1/8 9G7 9B7 31.8 1‐1/4 5G4 5D4 SIGNAL RANGE 82.6 3‐1/4 9G10 9B10 33.3 1‐5/16 2A12 2D12 0 to 2.0 bar (0 to 30 psig) SIGNAL RANGE 38.1 1‐1/2 2C10 2C10 0.2 to 1.0 bar (3 to 15 psig) 15.9 5/8 10D2 10D2 84.9 3‐11/32 9G8 9B8 19 3/4 10D3 10D3 85.7 3‐3/8 9G13 9B13 3.2 1/8 17H4 17H4 43.9 1.73 2G12 2D12 25.4 1 11A4 11D4 86.5 3‐13/32 9G10 9B10 (6) 3.2 1/8 10D3 10D3 47.6 1‐7/8 2G10 2C10 28.6 1‐1/8 11A5 11D5 88.9 3‐1/2 9G13 9B13 4 5/32 10D2 10H2 50.8 2 5G10 5D10 33.3 1‐5/16 11A12 11D12 92 3‐5/8 9G13 9B13 6.4 1/4 10B4 10H4 54 2‐1/8 12A3 12D3 (8) 8.7 11/32 6A3 6C3 54 2‐1/8 12G13 12D13 92.9 3‐21/32 9G8 9B8 9.5 3/8 6A3 6C3 63.5 2‐1/2 1A3 1D3 38.1 1‐1/2 11D12 11D12 95.3 3‐3/4 9G8 9B8 50.8 2 2G5 2D5 96.8 3‐13/16 9G8 9C8 (2) 54 2‐1/8 12G7 12D7 11.1 7/16 6A4 6D4 76.2 3 1B12 1D12 100 3‐15/16 21G8 21B8 (8) 54 2‐1/8 12G10 12D10 11.9 0.469 6A4 6D4 79.4 3‐1/8 1A12 1D12 101.6 4 21G8 21A8 76.2 3 12C3 12C3 12.7 1/2 7G1 7C1 82.6 3‐1/4 4G1 4C1 (2) 79.4 3‐1/8 12A8 12D8 14.8 0.582 5G4 5C4 88.9 3‐1/2 4G4 4D4 (6) 101.6 4 14G1 14A1 15.9 5/8 7G3 7B3 101.6 4 4G1 4B1 104.8 4‐1/8 16G8 16B8 101.6 4 1G1 1D1 (4) 108 4‐1/4 16G13 16D13 104.8 4‐1/8 1G1 1C1 (2) 17.5 11/16 7G4 7B4 104.8 4‐1/8 4G5 4D5 111.1 4‐3/8 16G1 16C1 (7) (6) SIGNAL RANGE 19 3/4 7G4 7C4 114.3 4‐1/2 21A13 21D13 114.3 4‐1/2 20A8 20C8 (6) 20.6 13/16 7A5 7B5 127 5 21A4 21D4 0.2 to 0.6 bar (3 to 9 psig) (6) 22.2 7/8 5G5 5C5 133.4 5‐1/4 21A3 21D3 (5) (4) 23.8 15/16 8G5 8B5 152.4 6 16G3 16C3 11.1 7/16 5G5 5A5 116.8 4.6 16G4 16C4 (2) 12.7 1/2 8G5 8A5 117.5 4‐5/8 16G3 16B3 (2) (2) 15.9 5/8 8G10 8A10 120.7 4‐3/4 16G3 16B3 190.5 7‐1/2 21G1 21D1 (5) (4) 25.4 1 8G5 8B5 19 3/4 8G13 8A13 127 5 14G1 14C1 203.2 8 21G10 21D10 27 1‐1/16 8G12 8B12 (5) 22.2 7/8 8G8 8B8 133.4 5‐1/4 16G10 16C10 28.6 1‐1/8 8G12 8B12 SIGNAL RANGE 31.8 1‐1/4 8G12 8B12 0.4 to 1.2 bar (6 to 18 psig) (5) 25.4 1 4G8 4B8 139.7 5‐1/2 14G1 14B1 33.3 1‐5/16 8G10 8C10 (5) 27 1‐1/16 4G8 4B8 152.4 6 13G3 13A3 (5) 19 3/4 5G5 5C5 28.6 1‐1/8 9G8 9A8 155.6 6‐1/8 13G3 13A3 (5) 28.6 1‐1/8 8G12 8B12 35 1‐3/8 9G8 9A8 35 1‐3/8 8G10 8B10 165.1 6‐1/2 13G3 13A3 38.1 1‐1/2 8G8 8B8 38.1 1‐1/2 9G8 9A8 36.5 1‐7/16 8G13 8B13 169.9 6‐11/16 20G3 20B3 50.8 2 4G8 4B8 38.1 1‐1/2 8G13 8B13 54 2‐1/8 9G3 9C3 39.7 1‐9/16 8G8 8C8 41.3 1‐5/8 9G8 9A8 (8) (5) 54 2‐1/8 9G12 9B12 41.3 1‐5/8 8G8 8B8 171.5 6‐3/4 13G5 13A5 50.8 2 15G8 15A8 173 6‐13/16 20G3 20A3 54 2‐1/8 15A1 15A1 44.5 1‐3/4 8G8 8B8 177.8 7 20G5 20C5 76.2 3 9G5 9C5 (8) 54 2‐1/8 15G5 15A5 (2,6) 46 1‐13/16 4G8 4C8 101.6 4 21G8 21B8 181.8 7‐5/32 13G1 13A1 58.7 2‐5/16 15G1 15A1 47.6 1‐7/8 4G7 4B7 188.1 7‐13/32 20G3 20B3 104.8 4‐1/8 16G8 16B8 63.5 2‐1/2 15G3 15A3 (4) 50.8 2 4G8 4B8 152.4 6 13G1 13B1 -Continued- 13 3570 Positioners Instruction Manual September 2011 D200137X012 (1) Table 4. Fisher 3570 Signal Range Codes (Continued) SIGNAL RANGE SIGNAL RANGE SIGNAL RANGE SIGNAL RANGE 0.4 to 1.2 bar (6 to 18 psig) 0.4 to 2.0 bar (6 to 30 psig) 0.6 to 1.0 bar (9 to 15 psig) 0.6 to 1.0 bar (9 to 15 psig) Travel Code Travel Code Travel Code Travel Code mm Inches Direct Reverse mm Inches Direct Reverse mm Inches Direct Reverse mm Inches Direct Reverse (5) 57.1 2‐1/4 12G1 12D1 165.1 6‐1/2 13G3 13A3 104.8 4‐1/8 14G8 14B8 206.4 8‐1/8 19G5 19C5 8.7 11/32 5A13 5D13 117.5 4‐5/8 13G3 13B8 58.4 2.3 12G3 12C3 11.1 7/16 5G5 5B5 12.7 1/2 12G13 12B13 60.3 2‐3/8 12A10 12D10 SIGNAL RANGE 15.9 5/8 8G8 8B8 (3) 127 5 13G12 13B12 0.4 to 2.0 bar (6 to 30 psig) 17.5 11/16 8G8 8C8 152.4 6 13G3 13B3 63.5 2‐1/2 1G3 1H3 155.6 6‐1/8 13G4 13B4 66.7 2‐5/8 1G3 1D3 165.1 6‐1/2 13G12 13B12 6.4 1/4 17H4 17H4 69.9 2‐3/4 1G4 1D4 (6) 177.8 7 13G3 13B3 9.5 3/8 10A4 10H4 76.2 3 1G1 1D1 19 3/4 8G10 8B10 11.1 7/16 10A2 10H2 79.4 3‐1/8 4G1 4C1 25.4 1 4F8 4B8 12.7 1/2 10A2 10D2 28.6 1‐1/8 9G8 9B8 203.2 8 18G8 18B8 15.9 5/8 3G2 3H2 38.1 1‐1/2 9F8 9B8 206.4 8‐1/8 18G8 18B8 41.3 1‐5/8 9F8 9B8 82.6 3‐1/4 4G1 4C1 SIGNAL RANGE 84.1 3‐5/16 4G3 4D3 19 3/4 11G4 11H4 85.7 3‐3/8 4G1 4H1 1.2 to 2.0 bar (18 to 30 psig) 22.2 7/8 11A5 11H5 88.9 3‐1/2 1G12 1D12 50.8 2 15G8 15B8 25.4 1 2G4 2D4 90.5 3‐9/16 4G1 4D1 54 2‐1/8 15G1 15B1 19 3/4 5G10 5D10 26.2 1‐1/32 2G4 2H4 (8) 54 2‐1/8 15F5 15B5 28.6 1‐1/8 5G8 5D8 28.6 1‐1/8 2G5 2D5 58.7 2‐5/16 15G1 15C1 38.1 1‐1/2 8F5 8C5 63.5 2‐1/2 15F1 15A1 92.9 3‐21/32 4G1 4D1 50.8 2 4F8 4D8 73 2‐7/8 14G8 14B8 95.3 3‐3/4 4G1 4D1 76.2 3 9G8 9H8 31.8 1‐1/4 2G5 2D5 101.6 4 4G4 4D4 35 1‐3/8 2G12 2D12 104.8 4‐1/8 4G12 4D12 38.1 1‐1/2 5G5 5D5 (6) 127 5 21A5 21H5 76.2 3 14G8 14B8 79.4 3‐1/8 9F8 9C8 39.7 1‐9/16 5G5 5D5 79.4 3‐1/8 14G8 14B8 82.6 3‐1/4 9F8 9C8 41.3 1‐5/8 5G5 5D5 (6) 82.6 3‐1/4 14G8 14B8 101.6 4 14E8 14D8 (6) 133.4 5‐1/4 21A13 21D13 87.3 3‐7/16 14G8 14B8 104.8 4‐1/8 16F8 16D8 (6) 142.9 5‐5/8 16G1 16D1 46 1‐13/16 5G5 5D5 (5) 88.9 3‐1/2 14G8 14B8 127 5 14F1 14D1 (5) 152.4 6 16G3 16C3 48.3 1.9 12G13 12H13 (2) 165.1 6‐1/2 16G1 16C1 50.8 2 12C8 12C8 (3) 90.5 3‐9/16 20F8 20A8 133.4 5‐1/4 19F3 19D3 (4) 177.8 7 21G12 21D12 (3) 54 2‐1/8 12G7 12D7 (5) 96.8 3‐13/16 14G8 14B8 165 6‐1/2 13F3 13B3 (8) (4) 54 2‐1/8 12G13 12D13 (5) 203.2 8 21E12 21D12 101.6 4 14G8 14A8 206.4 8‐1/8 18F1 18D1 1. For 3570P signal range codes, contact your Emerson Process Management sales office. 2. Use spring retainer spacer 1J803846172; for additional information, see table 7. 3. Use spring retainer spacer 1J223346172; for additional information, see table 7. 4. Use spring retainer spacer 1J803946172; for additional information, see table 7. 5. Use with high pressure bellows and spring retainer spacer 1J803946172; for additional information, see table 7. 6. Use with high pressure bellows. 7. Use with high pressure bellows and spring retainer spacer 1J223346172; for additional information, see table 7. 8. For use with 480‐12 or 480‐15 size 20 actuators. Adjustment Procedures Refer to figure 2. 3570 positioners have three adjustments: � The bias spring. It is the zero adjustment which determines the starting point of the valve plug travel. � The range spring. It is the span adjustment which determines the full valve plug travel for a given input signal range. � The relay nozzle adjustment. This adjustment determines the steady‐state positioner output pressure. To illustrate the use of the various adjustments, assume that the positioner has been repaired or has become completely out of adjustment. Assume also that the input signal range is 0.2 to 1 bar (3 to 15 psig). Proceed as follows: 1. Make sure the input signal range and the valve travel stamped on the nameplate agree with the present operating conditions. 2. Loosen the four thumb screws on the underside of the positioner base and remove the cover. 3. Provide a means for varying the input signal pressure from zero to 0.07 or 0.14 bar (1 or 2 psig) above the higher value of the input signal range (see table 1). Provide an accurate means of measuring the input signal pressure. 14 3570 Positioners Instruction Manual D200137X012 September 2011 Check the accuracy of the positioner instrument pressure gauge (see figure 4). The gauge accuracy is ±0.04 bar (±0.6 psig) on a 0 to 2 bar (0 to 30 psig) gauge, and ±0.08 bar (±1.2 psig) on a 0 to 2 bar (0 to 60 psig) gauge. This accuracy is measured at the mid‐point of the full range of the scale. 4. Set the input signal pressure at the mid‐point of its range [0.6 bar (9 psig) in this example]. Observe the valve travel indicator scale attached to the yoke. The indicator disk should be somewhere between the open and closed positions. 5. Loosen the locknut directly below the bias spring seat (see figure 2) and adjust the bias spring up or down until the valve travel indicator disk shows that the valve plug is somewhere between the open and closed positions. Upward movement of the bias spring adjustment causes downward travel of the valve stem. 6. For positioners with two relays (3570, 3570C, 3570P, 3570PC, and 3571 positioners), observe the relay output pressures. If the cylinder gauges are present as shown in figure 4, read the cylinder top and cylinder bottom gauges or use clip‐on test pressure gauges. The two relay output pressures should be approximately equal [within 0.3 bar (5 psig)] and should be approximately 75 percent of the supply pressure. For example, if the supply pressure is 7 bar (100 psig), the two relay output pressures should be within 0.3 bar (5 psig) of each other, and should be approximately 5.2 bar (75 psig). CAUTION The relays in the 3570C and 3570PC positioners use a locknut (key 29P, figure 11) on the nozzle (key 29Q). If the nozzle is rotated when the locknut is tight, damage to the relay diaphragm might result. Always use a wrench on the nozzle to prevent it from turning while loosening or tightening the locknut. If the relay output pressures are not at the values mentioned, adjust the nozzles. Counterclockwise rotation of either nozzle will move the nozzle closer to the beam and will increase relay output pressure. For all 3570 positioners, examine the end of the beam near the bias spring (see figure 2). The beam should be approximately centered between the two E‐ring travel stops. Observing the caution above for 3570C and 3570PC positioners, rotate the nozzle(s) to center the beam between the E‐rings. For positioners with two relays, the relay output pressures must be approximately equal [within 0.3 bar (5 psig)] and approximately 75 percent of supply pressure after the beam is centered. 7. Apply an input signal equal to the low value of the input signal range [0.2 bar (3 psig) in this example]. Adjust the bias spring (see figure 2) up or down until the valve travel is at the starting point. 8. Loosen the spring lock (see figure 2) and slowly increase the input signal toward the high end of the input signal range [1.0 bar (15 psig) in this example]. If the valve travel is less than its expected range, increase the travel by adjusting the range spring counterclockwise. If the valve travel reaches the end of its expected range with an input signal less than the high value of the input signal range, decrease the travel by adjusting the range spring clockwise. 9. Repeat steps 7 and 8 until the valve plug or travel indicator action corresponds to the input signal requirements of the application [0.2 to 1.0 bar (3 to 15 psig) in this example]. 10. Lock the range spring and the bias spring seat in position. The positioner is then ready for operation. 11. If the positioner is unstable and adjustment does not correct the problem, it might be due to unwanted fluctuations in the input signal. A restrictor assembly (key 47, figure 11) can be installed in the input signal circuit to dampen these fluctuations. The restrictor might help to minimize instability. To take the restrictor out of service, exchange the location of the restrictor with that of the bellows mounting screw (key 46, figure 11). 12. Replace the cover (key 39) on the positioner. 15 3570 Positioners Instruction Manual September 2011 D200137X012 (1,2) Table 5. Range (3) Code Number Part Number 1 1H8914000A2 2 1H8915000A2 3 1H8916000A2 4 1H8917000A2 5 1H8918000A2 6 1H8919000A2 7 1H8920000A2 8 1H8921000A2 9 1H8922000A2 10 1H8955000A2 11 1H895627012 12 1H8957000A2 13 1J5185000A2 14 1J5715000A2 15 1K5363000A2 16 1K6684000A2 17 1R613527012 18 1R2822000A2 19 1R853527012 20 1R899827012 21 1U582727012 22 17A3811X022 1. The range spring code number is the first number given in each signal range code listed in table 4. For example, for a signal range of 0 to 1.0 bar (0 to 15 psig), an actuator travel of 14.3 mm (9/16‐inch), and direct action, the signal range code from table 4 is 6G3. The appropriate range spring is indicated by “6”. 2. Range springs do not have a color code. All range springs are silver. 3. The first six numbers of a range spring part number is also the tag number. For example, a range spring with part number 1H8914 000A2 has a tag number of 1H8914. Tags are attached to the parts at the time the parts are manufactured. (1,2) Table 6. Bias Spring Code Letter Color Code Part Number (3) A Silver 1H861827012 (3) B Light blue 1H893227012 (3) C Red 1H893327012 (3) D Light green 1H896827012 (4) E Dark green 1J2932X00A2 (4) F Pink 1J2933000A2 (4) G Black 1N7177000A2 (3) H Brown 1R613427012 1. The bias spring code letter is the letter given in each signal range code listed in table 4. For example, for a signal range of 0 to 1.0 bar (0 to 15 psig), an actuator travel of 14.3 mm (9/16‐inch), and direct action, the signal range code from table 4 is 6G3. The appropriate bias spring is indicated by “G”. 2. It is necessary to add the bias spring seat (key 8) to a unit when changing from an extension type spring (key 9) to a compression type spring (key 48). 3.Compression type bias spring (key 48). 4. Extension type bias spring (key 9). Table 7. Spring Retainer (2) (2) OVERALL LENGTH EFFECTIVE LENGTH (1) (3) CODE NUMBER PART NUMBER mm Inches mm Inches 1 57 2‐15/64 44 1‐47/64 1H8907X0012 2 53 2‐5/64 40 1‐37/64 1H8908X0012 3 50 1‐63/64 38 1‐31/64 1H8909X0012 4 48 1‐7/8 35 1‐3/8 1H8911X0012 5 43 1‐11/16 30 1‐3/16 1H8910X0012 7 25 31/32 12 15/32 1H8912X0012 8 22 7/8 10 3/8 1H8552X0012 10 35 1‐3/8 22 55/64 1H8913X0012 12 38 1‐1/2 25 1 1J3572X0012 13 29 1‐1/8 16 21/32 1J9796X0012 1. Code numbers 6, 9, and 11 are not used. 2. Refer to figure 2. 3. The spring retainer code number is the second number given in each signal range code listed in table 4. For example, for a signal range of 0 to 1.0 bar (0 to 15 psig), an actuator travel of 14.3 mm (9/16‐inch), and direct action, the signal range code from table 4 is 6G3. The appropriate spring retainer is indicated by “3”. 16 3570 Positioners Instruction Manual D200137X012 September 2011 Table 8. Spring Retainer Spacer OVERALL EFFECTIVE (1) (1) (2) LENGTH LENGTH PART NUMBER mm Inches mm Inches 41 1‐5/8 29 1‐1/8 1L2069X0012 52 2‐1/16 40 1‐9/16 1J223346172 57 2‐1/4 44 1‐3/4 1J803846172 94 3‐11/16 81 3‐3/16 1P3957X0012 97 3‐13/16 84 3‐5/16 1J803946172 1. Refer to figure 2. 2. The spacer number is the first 6 characters of the part number and is stamped on the part. Changing Positioner Action The instructions given below are to be used after the springs have been changed or if no spring change is required. Numbered parts mentioned in this section are shown in figure 6 unless otherwise noted. Figure 6. Bellows Mounting for Direct and Reverse Action 2 RESTRICTOR 2 1 BELLOWS TOP VIEW WITH OPTIONAL RE­ STRICTOR 1 1 2 BELLOWS BASE 2 2 2 BEAM BEAM 1 3 BELLOWS BASE 3 PEDESTAL 1 PEDESTAL DIRECT REVERSE ACTION ACTION 1—MOUNTING SCREW 2—MOUNTING SCREW 3—BELLOWS POST A1088‐1/IL WARNING The following procedures require taking the positioner, actuator, and control valve assembly out of service. To avoid personal injury or property damage caused by uncontrolled process pressure, provide a temporary means of control for the process before taking the assembly out of service. Before removing the input signal and supply pressure connections from the positioner, remove the input signal and supply pressure sources from the connections. The sudden release of pressure can cause personal injury or property damage. 17 3570 Positioners Instruction Manual September 2011 D200137X012 Note Changing the positioner action might require changing the bias spring and/or the spring retainer. Refer to table 4 for correct signal range codes. Refer to the Maintenance section for disassembly and assembly procedures. Changing to Reverse Action 1. Bypass the control valve and shut off the input signal line and the supply pressure line to the positioner. 2. Loosen the four thumb screws on the underside of the positioner base and remove the cover. 3. Two bellows posts are provided. The posts are screwed into storage holes in the positioner base immediately above the CYLINDER and INSTRUMENT connections. Unscrew these posts. Note An optional restrictor (see the top view in figure 6) can be found in place of one of the bellows mounting screws (number 1). If so, note the location of the restrictor and replace it in the same location during reassembly. The restrictor has a hex head; the mounting screws do not. 4. Remove the four mounting screws (numbers 1 and 2) and lift out the bellows assembly. 5. Screw the bellows posts (number 3) into the holes where the screws (number 1) originally were. 6. Invert the bellows and replace the screws (numbers 1 and 2). 7. Refer to the adjustment procedures to check operation of the positioner. 8. Make a notation on the action label (key 43, figure 11) that the action of the positioner has been changed. 9. Replace the cover (key 39) on the positioner. Changing to Direct Action 1. Bypass the control valve and shut off the input signal line and the supply pressure line to the positioner. 2. Remove the positioner cover by loosening the four thumb screws on the underside of the base. Note An optional restrictor (see the top view in figure 6) can be found in place of one of the bellows mounting screws (number 1). If so, note the location of the restrictor and replace it in the same location during reassembly. The restrictor has a hex head; the mounting screws do not. 3. Remove the four mounting screws (numbers 1 and 2), bellows, and bellows posts (number 3). 4. Invert the bellows and reinstall it in the positioner. Secure the bellows with the four screws (numbers 1 and 2). Screw the bellows posts into the storage holes provided in the base immediately above the cylinder and instrument connections. 5. Refer to the adjustment procedures to check the operation of the positioner. If the input signal range has not been changed, adjustment of the range spring might not be necessary. 18 3570 Positioners Instruction Manual D200137X012 September 2011 6. Make a notation on the positioner action label (key 43, figure 11) that the action of the positioner has been changed. 7. Replace the cover (key 39) on the positioner. Split Range Operation 3570 valve positioners are suitable for split range operation. In split range operation, two or more control valves are operated by one output signal from a single control device. When two control valves are split ranged, one valve strokes fully with one half the input signal range and the second valve strokes fully with the other half of the input signal range. Valve positioners shipped from the factory for split range operation are constructed and adjusted accordingly. If it is necessary to convert an existing positioner to one suitable for split range operation, refer to table 4. If the application requires a selection not listed in table 4, consult your Emerson Process Management sales office to determine the new parts required. For most changes, a new range spring and possibly a new bias spring will be required. A new range spring retainer might also be required for 3570, 3570C, 3572, and 3573 positioners. When corresponding with your Emerson sales office, supply all information possible about the desired operating conditions and the serial numbers of the control valve assembly. This information will facilitate the proper selection of the required parts. To change an existing valve positioner to one suitable for split range operation, refer to the range and bias spring removal and replacement procedures in the Maintenance section. Be certain the required new parts are on hand before beginning any maintenance operation. Initial Range Spring Extension Procedures for 3570P And 3570PC Positioners This procedure must be performed whenever the range spring has been changed or the positioner has been removed. Key numbers used in this procedure are shown in figure 14 except where indicated. 1. With the cap screw (key 87) removed, hook the small ball of the positioner cable (key 91) into the slot of the smaller portion of the cable spool (key 96). Wind the cable on the spool until the coils of the range spring (key 18, figure 11) are slightly separated. Be certain the cable is wound so that it comes off the side of the spool opposite the access opening and that the cable cannot cross itself on the spool. 2. Install the ball end of the actuator cable (key 92) into the slot of the large portion of the spool that is closer to the access opening. Wrap the cable on the spool as many times as possible, then bring the cable out through the bottom of the positioner extension. Be certain the cable is wound so that it comes off the side of the spool opposite the access opening and that the cable cannot cross itself on the spool. Attach the cable to the cable strap (key 93), leaving approximately a 0.8 mm (1/32‐inch) gap between the cable eye and cap screw head (key 94). 3. With the actuator piston rod completely retracted and the range spring coils slightly separated, attach the cable strap to the actuator feedback arm. Use the set of cable‐strap holes closest to the range spring. Turn the spring cap (key 86) one turn counterclockwise and install one cap screw (key 87). 4. Adjust the range spring (key 18, figure 11) to obtain full travel for the input signal range (span adjustment). Refer to step 7 of the adjustment procedures. Adjustment of the bias spring (zero adjustment) does not need to be done at this time. 5. Remove the screw from the spring cap and slowly release the torsion spring force by turning the spring cap clockwise. Disconnect the cable strap from the actuator and remove all range spring extension by rotating the cable spool. 19 3570 Positioners Instruction Manual September 2011 D200137X012 6. Rotate the cable spool to obtain the correct initial range spring extension. Each full revolution of the spool extends the range spring 50.8 mm (2 inches) [6.4 mm (1/4‐inch) for 1/8 revolution]. If the initial range spring extension is not specified, calculate it using one of the equations given below. Round off the amount of extension (e) obtained from the equation to the next higher 6.4 mm (1/4 inch). T e�= (standard bellows) 1.87 (P ) n T (optional high pressure bellows) e�= 1.25 (P ) n where: e = initial range spring extension required in mm T = actuator travel in mm P = input signal span in bar (for example, 0.8 bar for a 0.2 to 1 bar input signal range) n or where: e = initial range spring extension required in inches T = actuator travel in inches P = input signal span in psi (for example, 12 psi for a 3 to 15 psig input signal range) n 7. If necessary, move the actuator cable ball to the spool slot nearer the access opening. With the actuator piston rod fully retracted and the range spring at the correct initial extension, attach the cable strap to the actuator feedback arm. Use the set of cable strap holes that is closest to the tapped holes in the feedback arm. 8. Refer to the positioner adjustment procedures. 20 3570 Positioners Instruction Manual D200137X012 September 2011 Principle of Operation 3570, 3570C, 3570P, 3570PC, and 3571 Valve Positioners Refer to the schematic diagram in figure 7. The pneumatic output signal from a control device is piped to the positioner bellows. For explanation purposes, assume this signal has increased. The bellows expands and moves the beam, which pivots around a fixed point and simultaneously uncovers the nozzle of relay B and covers the nozzle of relay A. The nozzle pressure in relay A increases due to the restriction created by the beam covering the nozzle. Through relay action, the pressure to the top of the piston increases. At the same time, relay B reacts to the change in beam position to decrease the pressure to the underside of the piston. These unbalanced pressures move the actuator piston down. In the 3570 and 3570C positioners, the piston movement is fed back to the beam by means of a range spring, which is connected to the beam and to the piston rod extension. In the 3570P, 3570PC, and 3571 positioners, the feedback is provided to the range spring by a cable or wire that is connected to the actuator‐valve stem connector. The downward movement of the piston rod extension extends the range spring until the torque on the beam balances the torque exerted by the instrument bellows. Figure 7. Schematic Diagram of Fisher 3570 Positioner with a 470 Pneumatic Piston Actuator BELLOWS REVERSED POSITION RELAY “B” RANGE SPRING BIAS SPRING R INPUT SIGNAL CYLINDER SUPPLY RELAY “A” R SUPPLY R = RESTRICTION YOKE INPUT SIGNAL PRESSURE SUPPLY PRESSURE TOP CYLINDER PRESSURE BOTTOM CYLINDER PRESSURE A1067‐1 / IL NOZZLE PRESSURE As the input signal decreases, the reverse action takes place. The bellows contracts, and as the beam pivots, it covers the nozzle of relay B and uncovers the nozzle of relay A. Through relay action, the pressure below the piston increases and the pressure above the piston decreases to move the piston upward. 21 3570 Positioners Instruction Manual September 2011 D200137X012 3572 and 3576 Valve Positioners Refer to the schematic diagram in figure 8, which shows the 3572 positioner mounted on a 472 pneumatic piston actuator. For the 3576 positioner, the principle of operation is identical to the 3572 positioner but the actuator can be a direct or reverse acting pneumatic diaphragm actuator. Figure 8. Schematic Diagram of Fisher 3572 Positioner with a 472 Pneumatic Piston Actuator BELLOWS REVERSED POSITION RANGE SPRING BIAS SPRING INPUT SIGNAL CYLINDER R RELAY A SUPPLY R = RESTRICTION PISTON YOKE INPUT SIGNAL PRESSURE SUPPLY PRESSURE TOP CYLINDER PRESSURE NOZZLE PRESSURE CR4006‐A A1084‐1/IL The pneumatic output signal from a control device is piped to the positioner bellows. For explanation purposes, assume this signal has increased. The bellows expands and moves the beam, which pivots around a fixed point and covers the relay nozzle. The nozzle pressure in the relay increases due to the restriction created by the beam covering the nozzle. Through relay action, the pressure above the piston overcomes the force exerted by the actuator spring, and the piston moves downward. This changes the valve plug position. In the 3572 positioner, piston movement is fed back to the beam by means of a range spring, which is connected to the beam and the piston rod extension. As the piston rod extension moves downward, the range spring is extended until the torque of the beam balances the torque exerted by the instrument bellows. 22 3570 Positioners Instruction Manual D200137X012 September 2011 In the 3576 positioner, the feedback is provided to the range spring by a wire that is connected to the actuator‐valve stem connector. As the input signal decreases, the reverse action takes place. The bellows contracts, and as the beam pivots, it uncovers the relay nozzle. Through relay action, the pressure on top of the piston decreases, and the force of the actuator spring moves the piston upward. 3573 and 3577 Valve Positioners Refer to the schematic diagram in figure 9, which shows the 3573 positioner mounted on a 473 pneumatic piston actuator. For the 3577 positioner, the principle of operation is identical to the 3573 positioner, but the actuator can be direct or reverse acting. Figure 9. Schematic Diagram of Fisher 3573 Positioner with 473 Pneumatic Piston Actuator BELLOWS REVERSED RELAY RANGE SPRING POSITION BIAS R SPRING INPUT SIGNAL CYLINDER SUPPLY R = RESTRICTION PISTON YOKE INPUT SIGNAL PRESSURE SUPPLY PRESSURE BOTTOM CYLINDER PRESSURE CR4007‐A A1082‐1/IL NOZZLE PRESSURE The pneumatic output signal from a control device is piped to the positioner bellows. For explanation purposes, assume this signal has increased. The bellows expands and moves the beam, which pivots around a fixed point and uncovers the relay nozzle. The nozzle pressure decreases due to the uncovering of the nozzle by the beam. Through 23 3570 Positioners Instruction Manual September 2011 D200137X012 relay action, the pressure to the underside of the piston decreases. The force exerted by the actuator spring overcomes the force of the pressure below the piston, and the piston moves downward. This changes the valve plug position. In the 3573 positioner, piston movement is fed back to the beam by means of a range spring, which is connected to the piston rod extension. The downward movement of the piston rod extension extends the range spring until the torque of the beam balances the torque exerted by the instrument bellows. In the 3577 positioner, feedback is provided to the range spring by a wire that is connected to the actuator‐valve stem connector. As the input signal decreases, the reverse action takes place. The bellows contracts, and as the beam pivots, it covers the relay nozzle. Through relay action, the pressure on the underside of the piston increases to overcome the force exerted by the actuator spring, and the piston moves upward. Relay Operation Refer to figure 10, which shows a sectional view of a typical relay. Supply pressure reaches the relay(s) through passages in the positioner base and is channeled to fixed restriction R and to point A between the supply valve B and the balancing O‐ring of the relay valve. The fixed restriction is an integral part of the relay restriction plug and wire assembly G. The orifice in nozzle F is larger than the fixed restriction. This allows the supply pressure to bleed to atmosphere faster than it enters the unit through the fixed restriction when the beam flapper is away from the nozzle. Assume that a change in the input signal causes the beam flapper to cover the nozzle of a relay. The supply pressure flows through fixed restriction R into the chamber between the two relay diaphragms. Due to the restricting effect of the flapper over the nozzle, pressure builds up in the chamber between the diaphragms, forcing the diaphragm head assembly E downward to open supply valve B, allowing output pressure to increase. The supply pressure flows past supply valve B to increase the output pressure to the actuator cylinder. The cylinder pressure (relay output pressure) also acts on the area D. This provides an air feedback that returns the diaphragm head assembly E and the movable nozzle F to their original positions, thus preventing any further increase in output pressure. The feedback arrangement and the movable nozzle ensure accurate and stable positioning of the actuator piston without introducing cycling or over‐correction. After any change in the output pressure, supply valve B and exhaust valve C always return to the closed position to put the nozzle back in its original, or equilibrium, position. The spring behind supply valve B aids in closing the valve as the diaphragm head assembly is forced upward. When the beam flapper moves away from the nozzle F, the supply pressure bleeds out at a greater rate than it enters through the fixed restriction R. The pressure then decreases in the chamber between diaphragms. The force of the cylinder pressure acting on area D pushes diaphragm head assembly E upward, opening exhaust valve C. Cylinder pressure bleeds through the exhaust port to atmosphere. As the cylinder pressure decreases and the force on area D decreases, the force of the nozzle pressure in the chamber between the diaphragms returns the assembly to its original position. The unit is again in equilibrium, but at a lower nozzle pressure and a lower output pressure. Each relay has a 4:1 ratio between the nozzle pressure and the output pressure. For example, a 0.7 bar (10 psig) nozzle pressure change, produces a 2.7 bar (40 psig) output pressure change; a 1.4 bar (20 psig) nozzle pressure change produces an 5.5 bar (80 psig) output pressure change. With a constant input signal pressure, the internal parts of the relay are at equilibrium with the supply and exhaust valves closed. 24 3570 Positioners Instruction Manual D200137X012 September 2011 Figure 10. Sectional View of a Typical Relay NOZZLE AND LOCKNUT F USED WITH 3570C AND 3570PC POSITIONERS 40A8972‐B/DOC E R EXHAUST D C A B 1 G OUTPUT CLEAN‐OUT PLUNGER SUPPLY A-SUPPLY PRESSURE AREA B-RELAY OUTPUT PRESSURE VALVE NOTES: OUTPUT PORT IS SHOWN 1 C-EXHAUST VALVE 90 DEGREES TO THE FRONT OF D-RELAY OUTPUT PRESSURE AREA ACTUAL LOCATION. E-DIAPHRAGM HEAD ASSEMBLY W0700‐1/IL F-NOZZLE G-RELAY RESTRICTION PLUG AS­ SEMBLY R-FIXED RESTRICTION Maintenance Parts are subject to normal wear and must be inspected periodically and replaced as necessary. The frequency of parts inspection and replacement depends upon the severity of service conditions. When inspection or repairs are required, disassemble only those parts necessary to accomplish the task. WARNING Avoid personal injury from sudden release of process pressure. Before performing any maintenance operations: � Always wear protective clothing, gloves, and eyewear. 25 3570 Positioners Instruction Manual September 2011 D200137X012 � Do not remove the actuator from the valve while the valve is still pressurized. � Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the actuator cannot suddenly open or close the valve. � Vent the power actuator loading pressure and relieve any actuator spring precompression. � Use lock‐out procedures to be sure that the above measures stay in effect while you work on the equipment. � Personal injury or property damage may result from fire or explosion if natural gas is used as the supply medium and preventive measures are not taken. Preventive measures may include, but are not limited to, one or more of the following: Remote venting of the unit, re‐evaluating the hazardous area classification, ensuring adequate ventilation, and the removal of any ignition sources. For information on remote venting of this positioner, refer to page 8. � Check with your process or safety engineer for any additional measures that must be taken to protect against process media. Troubleshooting If the positioner causes sluggish or erratic operation or the malfunctioning of the actuator, first, be certain that the range springs, bias springs, and spring retainer are correct for the application. Refer to table 4 or consult your Emerson Process Management sales office. If the springs and spring retainer are correct, and careful adjustment of the unit does not produce smooth and satisfactory operation, check the following points. Key numbers used in this procedure are shown in figure 11 except where indicated. Figure 4 shows part locations. 1. Clean out the primary orifice on each relay by depressing the clean‐out plunger. The plunger is located in the orifice assembly (key 29S). This operation runs a fine wire through the orifice to clear the hole. 2. Check the nozzle (key 29Q) of each relay for plugging. To clean, swing the flapper (key 12) away from the nozzle by loosening the screw that holds the flapper in place. CAUTION The relays used in 3570C and 3570PC positioners use a locknut (key 29P, figure 12) on the nozzle (key 29Q, figure 12). If the nozzle is rotated when the locknut is tight, damage to the relay diaphragm will result. Always use a wrench on the nozzle to prevent it from turning while loosening or tightening the locknut. Unscrew the nozzle and run a fine wire through it. Do not enlarge the hole. Also check the surface of the flapper for any accumulation of dirt or foreign materials. 3. Check the bellows assembly for damage, misalignment, or leakage. Also check all gasketed joints for leakage. Use soap solution for leak detection. 4. Check the beam for damage, binding or rubbing against stationary parts. Check the flexure strip screws (key 17) for tightness. 5. If the positioner operation has improved, refer to the adjustment procedures. 6. If the relays require replacement, go to step 7. 7. Unscrew the three machine screws (key 31) from each relay and remove the relays. 26 3570 Positioners Instruction Manual D200137X012 September 2011 8. Mount the relays in their respective positions on the positioner pedestal, making certain that the relay gasket (key 30) is in good condition and is in place. 9. If the positioner operation is still sluggish, a slight adjustment of the bias spring post (see figure 2) might be necessary. Loosen the locknut and rotate the post in half‐turn increments, checking after each half turn for proper operation. Rotate the post no more than two turns from the position shown in figure 2. Refer to the adjustment procedures after rotating the post to check the position of the post and beam assemblies. Converting a 3570 Valve Positioner to a 3570C Valve Positioner If desired, tire valves can be substituted for pressure gauges. Also, locking relay nozzles can be added on any 3570 positioner. This provides the construction that is standard with 3570C and 3570PC positioners. Key numbers used in this procedure are shown in figure 11 except where indicated. When reassembling, coat all pipe threads with a good quality pipe thread compound. 1. Isolate the control valve from the line pressure and release pressure from both sides of the valve body. If using a power actuator also shut‐off all pressure lines to the power actuator and release all pressure from the actuator. Use lock‐out procedures to be sure that the above measures stay in effect while you work on the equipment. 2. Loosen the knurled screws (key 38) and remove the cover (key 39). 3. Disconnect the tubing assemblies (keys 28 and 45) from the base and from the gauges (keys 24 and 25). Unscrew the hex nuts (key 27) from the back of the gauges and remove the gauges (keys 24 and 25). 4. Unscrew the pressure gauge (key 54) from the gauge adaptor (key 29U). 5. Unscrew and remove the nozzle and spring (keys 29Q and 29P) from each relay. 6. The gauge bracket (key 5) can be removed if desired. To remove it, loosen the locknut (key 7) and remove the bias spring post and cap screw (keys 6 and 32). When replacing the bias spring post, be sure that the bottom of the post thread is positioned as shown in figure 2 for proper positioning of the E‐ring travel stops. This alignment can be verified visually through the vent port. 7. Use compression plugs (key 52) to plug the holes opened in the base when the tubing is removed. CAUTION Never rotate the nozzle (key 29Q) when the locknut (key 29P) is tight, or damage to the relay diaphragm will result. Always use a wrench on the nozzle to prevent it from turning while loosening or tightening the locknut. 8. Install the locknut and nozzle (keys 29P and 29Q) on each relay. 9. Install the tire valve (key 26, figure 12) into the gauge adaptor (key 29U). 10. Install the service tee and tire valve adaptor (keys 49 and 53, figure 12) into the CYLINDER connection. Connect the pressure line that runs to the lower part of the cylinder to the service tee. 11. Install the pipe nipple, pipe tee, and tire valve adaptor (keys 50, 51, and 53, figure 12) into the INSTRUMENT connection. Connect the input signal line to the pipe tee. 12. Refer to the adjustment procedures. 27 3570 Positioners Instruction Manual September 2011 D200137X012 Range Spring Disassembly Unless otherwise directed, key numbers refer to figures 11 and 12. WARNING The following procedure requires taking the positioner, actuator, and control valve assembly out of service. To avoid personal injury or property damage caused by uncontrolled process pressure, provide a temporary means of control for the process before taking the assembly out of service. Before removing the input signal and supply pressure connections from the positioner, remove the input signal and supply pressure sources from the connections. The sudden release of pressure can cause personal injury or property damage. 1. Bypass the control valve and shut off the input signal and the supply pressure lines to the positioner. 2. Remove the positioner cover (key 39). 3. Loosen the spring lock (see figure 2) that holds the range spring (key 18) to the beam. 4. Disconnect the other end of the range spring by performing one of the following steps: � For 3570, 3570C, 3572, and 3573 positioners, use a screwdriver to remove the spring retainer (key 19, figure 2) from the piston rod extension. � For 3570P and 3570PC positioners (see figure 12), remove the screws (key 87), from the cap (key 86) and rotate the cap clockwise to remove all torsion spring force. Disconnect the actuator cable (key 92) from the cable strap (key 93). Unhook the positioner cable (key 91) from the cable spool (key 96). � For 3571, 3576, and 3577 positioners, loosen the set screw found in the spring retainer (key 56A, figure 13) and remove the spring wire (key 56D) from the retainer. 5. Remove the range spring from the beam by rotating the range spring counter clockwise. Assembly 1. Install the new range spring. For 3570, 3570C, 3572, and 3573 positioners, also install the spring retainer. See figures 2 or 11. 2. Reconnect the range spring to the piston rod extension (3570, 3570C, 3572, and 3573 positioners) or the feedback wire (3571, 3576, and 3577 positioners, figure 13). For 3570P and 3570PC positioners, install the positioner cable (key 91, figure 14) in the range spring so that the large ball on the cable seats in the conical portion of the spring. 3. Install the spring lock (key 20, figure 11). Adjust the positioner per instructions in the adjustments procedures. The action of the positioner can be reversed in the same manner as described in the changing positioner action procedures. However, before attempting to reverse the action, see table 4 or consult your Emerson Process Management sales office to determine if any different parts are required. 28 3570 Positioners Instruction Manual D200137X012 September 2011 Bias Spring Disassembly 1. Refer to figure 2. Remove the top E‐ring travel stop. 2. Loosen the locknut securing the bias spring seat in place. Then rotate the adjusting screw until the spring force is at a minimum. 3. Loosen the locknut that secures the bias spring post to the positioner base. Using a screwdriver in the slot in the top of the post, unscrew the post from the base. 4. Tilt the bottom of the post out and remove the post from the beam. 5. Remove the locking nuts and the spring seat from the bias spring post. Assembly 1. Install the new bias spring, spring seat, and locking nuts on the bias spring post. 2. Replace the bias spring post into the beam and install the top E‐ring travel stop. 3. Install the bias spring post into the base. Be certain that the bottom of the post thread is positioned as shown in figure 2. Ensure that the beam does not rub on the post. 4. For 3570P and 3570PC positioners, go to the initial range spring extension procedures for 3570P and 3570PC positioners. 5. Adjust the positioner as described in the adjustments procedures. The action of the positioner can be reversed in the same manner as described in the changing positioner action procedures. However, before attempting to reverse the action, see table 4 or consult your Emerson Process Management sales office to determine if a different retainer, different range springs or different bias springs are required. Parts Ordering A serial number is assigned to each positioner. The serial number is stamped on the nameplate. Always refer to the serial number when corresponding with your Emerson Process Management sales office regarding spare parts or technical information. When ordering replacement parts, also specify the complete 11‐character part number from the parts kits or parts list information. WARNING Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Process Management should not, under any circumstances, be used in any Fisher instrument. Use of components not supplied by Emerson may void your warranty, might adversely affect the performance of the valve, and could cause personal injury and property damage. 29 3570 Positioners Instruction Manual September 2011 D200137X012 Parts Kits Parts List Positioner Common Parts (figures 11 and 12) Note Parts kits for 3570 positioners contain the gaskets, diaphragms, and O‐ring seals as specified by the type and temperature limitations. Parts Note are for 3570, 3570C, 3570P, and 3570PC positioners. Part numbers are shown for recommended spares only. For part numbers not shown, contact your Emerson Process Management sales office. Key Description Part Number 1 Pilot base, aluminum 2 Pedestal, aluminum 3* Pedestal gasket  Chloroprene (std. const.) 1H854703012 Positioner Repair Kits  Fluorocarbon (hi‐temp. const.) 1H8547X0012 4 Machine screw, pl steel (5 req'd) 5 Gauge bracket, pl steel Description Part Number  For all types except 3570C 6 Bias spring post, pl steel 7 Hex nut, pl steel (2 req'd) Positioner kit includes: 8 Spring seat, pl steel (use with key 48 only) Keys 3, 12, 29 (qty. 2), 30, 33, and 37  For the 3570 R3570X00022 9 Bias Spring, extension type  For the 3570C R3570CX0022  Color Code:  For the 3570C (hi‐temp. const.) R3570CX0H32 �Black �Pink �Dark green 10 Retaining ring, pl steel (2 req'd) 11 Beam, aluminum 12 Flapper, SST (2 req'd) Diagnostic Test Connection Kits 13 Flapper arm, aluminum 14 Horizontal flexure strip (2 req'd) 15 Vertical flexure strip 16 Machine screw, pl steel (2 req'd) 17 Machine screw, pl steel Note  For 3570, 3570C, 3571 (12 req'd)  For 3572, 3573, 3576, 3577 (11 req'd) Part numbers are shown for recommended spares only. For part numbers not shown, contact your Emerson Process Management sales 18 Range Spring, pl steel See table 5 office. 19 Spring retainer, SST See table 7 20 Spring lock, SST 21* Bellows assembly, brass  To 3.4 bar (50 psig) 1H8610000A2  High pressure bellows, brass, �over 3.4 bar (50 psig) 1H9010000A2 Kit includes pipe tee, pipe nipple, pipe bushings, connector body, 22 Bellows post, brass (2 req'd) and body protector used with the FlowScanner. 23 Name plate, aluminum  For Diaphragm Actuators 24* Instrument gauge, plastic case/brass wetted parts �Stainless steel  For all types except 3570C �Steel �0‐30 psi/0‐.2 MPa/0‐2 bar 21B4037X012  For Piston Actuators �0‐60 psi/0‐.4 MPa/0‐4 bar 21B4037X022   Stainless steel 25* Cylinder bottom gauge, plastic case/brass wetted parts  For 3570, 3571, 3573, 3577   Steel Pipe Thread Sealant (not furnished with hardware or connectors) �0‐160 psi/0‐1.1 MPa/0‐11 bar 21B4037X032 30 *Recommended spare parts 3570 Positioners Instruction Manual D200137X012 September 2011 Figure 11. Fisher 3570 Positioner PART 22 DIRECT ACTION 1 EXTENSION TYPE BIAS SPRING ASSEMBLY SECTION OF PART 29 2 1/4 NPT CYLINDER BOTTOM CONNECTION 1/4 NPT 1/4 NPT SUPPLY CONNECTION INPUT SIGNAL 3/8 NPT VENT CONNECTION CONNECTION NOTES: 1 ZERO ADJUSTMENTS IS PART OF KEY 9 FOR EXTENSION TYPE BIAS SPRING. 2 ZERO ADJUSTMENTS IS PART OF KEY 9 FOR EXTENSION TYPE BIAS SPRING. 40A8973‐C B1840/IL Key Description Part Number Key Description Part Number 30 Relay gasket, (2 req'd) 26 Valve Assembly  Chloroprene (std. const.)  For 3570C only  Fluorocarbon (hi‐temp. const.) 27 Hex nut, brass 31 Machine screw, pl steel  For 3570, 3571, 3573 (2 req'd)  For 3570, 3570C, 3571 (6 req'd)  For 3572, 3576, 3577 (1 req'd)  For 3572, 3573, 3576, 3577 (3 req'd)  For 3570C (none req'd) 28 Instrument tubing assembly, copper 32 Cap screw, pl steel (2 req'd)  For all types except 3570C 33* O‐ring  Nitrile (std. const.) 1C853806992 29 Relay assembly See Repair Kits  Fluorocarbon (hi‐temp. const.) 1C8538X0052 *Recommended spare parts 31 3570 Positioners Instruction Manual September 2011 D200137X012 Figure 12. Fisher 3570C Positioner PART 22 DIRECT ACTION EXTENSION TYPE BIAS SPRING ASSEMBLY SECTION OF PART 29 40A8972‐B B1841/IL Key Description Part Number Key Description 34 Spring anchor, SST 43 Label, paper 35 Machine screw, pl steel (2 req'd)  For direct‐acting units 36 Pipe plug, pl steel  For reverse‐acting units 37* Cover gasket, 45 Cylinder tubing assembly, copper  Cork (std. const.) 1H853804042  For 3570, 3571, 3573, 3577  Silicone (hi‐temp. const.) 1H853804142 38 Cover screw, pl steel (4 req'd) 46 Bolt, brass 39 Cover, aluminum  w/o restrictor assembly (2 req'd) 40 Washer, brass plated (2 req'd)  w/restrictor assembly (1 req'd) 47 Restrictor assembly, SST 41 Relay blank, aluminum (see figure 14)  For 3572, 3573, 3576, 3577 42 Screw, SST (see figure 14)  For 3572, 3573, 3576, 3577 (3 req'd) 32 *Recommended spare parts 3570 Positioners Instruction Manual D200137X012 September 2011 Key Description Part Number Figure 13. Feedback Wire Assembly (Typical with 48 Bias spring, compression type, pl steel Fisher 3571, 3576, and 3577 Positioners)  Color Code: �Silver �Light blue �Red �Light green �Brown 49 Service tee, iron  For 3570C only 50 Pipe nipple, pl steel  For 3570C only 51 Pipe tee, iron  For 3570C only 52 Compression plug, brass  For 3570C only (2 req'd) 53 Adaptor, brass  For 3570C only (2 req'd) 54* Cylinder top gauge,  plastic case/brass wetted parts,  For 3570, 3571, 3572, 3576 �triple scale, 0‐160 psi/0‐1.1 MPa/0‐11 bar 11B4040X032 2 �dual scale, 0‐160 psi/0‐11 kg/cm 11B4040X062 REVERSE BOOT FOR TRAVELS OVER 50.8 mm Note (2 INCHES) Refer to figure 13 for keys 55 through 26E. NOTE: RELAY BLANK AND SCREWS (KEY 42 AND 42) ARE INSTALLED WHERE SHOWN FOR 3573 AND 3577 POSITIONERS. FOR 3572 AND 3576 POSITIONERS, THESE PARTS ARE INSTALLED ON THE OPPOSITE SIDE OF THE POSITIONER 55 Mounting bracket, aluminum 40A9335‐C A3230/IL  For 3571, 3576, 3577 56A Spring retainer, pl steel  For 3571, 3576, 3577 56B Set screw, pl steel Key Description  For 3571, 3576, 3577 (2 req'd) 56C Boot, chloroprene 92 Actuator cable  For 3571, 3576, 3577 93 Cable strap, brass 56D Spring wire, pl steel 94 Cap screw, pl steel (3 req'd)  For 3571 95 Hex nut, pl steel  For 3576, 3577 96 Cable spool, acetal plastic 56E End bearing  For 3571, 3576, 3577 97 Spring guide, aluminum 98 Warning plate 75 Tubing, copper (specify length) 99 Self‐tapping screw, pl steel 77 Elbow, 3/8‐inch, brass (specify quantity) 100 Cap screw, pl steel (2 req'd) 78 Connector, 3/8‐inch brass (specify quantity) 101 Positioner extension assembly, aluminum 84 Spring retainer spacer, SST See table 8 102 Washer, SST  For 3572, 3576 (1 req'd)  For 3570, 3571, 3573, 3577 (2 req'd) Note 235 Spring retainer spacer, SST Refer to figure 14 for keys 86 through 101.  104.8 mm (4‐1/8 inches) maximum actuator travel, �54.0 mm (2‐1/8 inches) or less valve travel 86 Spring cap assembly, aluminum and SST  206.4 mm (8‐1/8 inches) maximum actuator travel, 87 Machine screw, pl steel (2 req'd) �between 54.0 mm (2‐1/8 inches) and 104.8 mm 88 Torsion spring, steel  �(4‐1/8 inches) valve travel (2 different spacers req'd) 89 Extension cover, aluminum 90 Machine screw, pl steel (6 req'd)  206.4 mm (8‐1/8 inches) maximum actuator travel, 91 Positioner cable �less than 54.0 mm (2‐1/8 inches) valve travel (2 req'd) *Recommended spare parts 33 3570 Positioners Instruction Manual September 2011 D200137X012 Figure 14. Fisher 3570P and 3570PC Positioner VIEW A‐A TYPICAL MOUNTING FOR 3570P AND 3570PC POSITIONERS 41A7131‐A B1839/IL 34 3570 Positioners Instruction Manual D200137X012 September 2011 35 3570 Positioners Instruction Manual September 2011 D200137X012 Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Fisher and FlowScanner are marks owned by one of the companies in the Emerson Process Management business division of Emerson Electric Co. Emerson Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners. The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without notice. Emerson Process Management Marshalltown, Iowa 50158 USA Sorocaba, 18087 Brazil Chatham, Kent ME4 4QZ UK Dubai, United Arab Emirates Singapore 128461 Singapore www.Fisher.com 36 �Fisher Controls International LLC 1974, 2011; All Rights Reserved