FLOW SWITCHES IN FS-10798 Series – Externally Adjustable for Water, Oils and Gases Flow Rate Settings: Liquids: Infinite Adjustment between 0.5 GPM and 20.0 GPM Air/Gases: See Gas Flow Adjustment Ranges below Port Size: 1/2˝ NPT Primary Construction Material: Brass or Stainless Steel Setting Type: Adjustable These externally adjustable switches are ideal for protecting machine tools from coolant flow failure, for protecting bearings from loss of lubricant or to assure proper air flow. They offer an infinite number of flow settings at pressures up to 1000 PSIG, U.L. Recognized — File with low pressure drop and precise repeatability. No. E31926 Shown with optional 1/2” CSA Listed — The adjusting vane is easily field adjustable using an ordinary flat-bladed screwdriver. conduit connector. File No. LR30200 The adjustment is set-screw-locked for tamper-free operation after field calibration. Dimensions Specifications With Wire Leads and Strain Relief Wetted Materials FLOW ACTUATION ADJUSTMENT Housing Brass or 316 Stainless Steel Piston 3/4" 2" (19.0 mm) (50.8 mm) In Brass Housing Polysulfone for water; Brass for oil or air In Stainless Steel Housing 316 Stainless Steel Only Spring 316 Stainless Steel 5/8" ® (15.8 mm) O-Ring Viton 4-1/8" (104.7 mm) 1-1/4" Other Wetted Parts Epoxy 1/2" NPT BOTH PORTS (31.7 mm) Pressure Rating Operating 1000 PSIG (69 bar) Proof 2500 PSIG (172 bar) Burst 5000 PSIG (345 bar) Operating Temperature With 1/2˝ NPT Conduit Connector With Brass or S.S. Piston -20°F to +300°F (-29°C to +148.9°C) 1/2" With Polysulfone Piston -20°F to +225°F (-29°C to +107.2°C) (12.7 mm) Repeatability 1% Maximum Deviation 1-1/16" Set Point Accuracy ±10% Maximum (26.9 mm) MAX. Set Point Differential 15% Maximum Switch* SPDT, 20 VA Inlet/Outlet Ports 1/2˝ NPT Electrical Termination No. 18 AWG, 24˝ L., Polymeric Lead Wires *See “Electrical Data” on Page X-5 for more information. Air/Gas Flow Adjustment Ranges Water or oil flow units should not be utilized for air/gas applications. The FS-10798 Gas Flow configuration utilizes a special dash-pot piston for reliability. The flow adjustment ranges are typical for air service. For other gases, the flow range will vary with the density of the gas. Please consult factory for more information. For 5 PSIG Line* 1 to 75 SCFM Approx. For 100 PSIG Line 3 to 160 SCFM Approx. * Minimum 5 PSI line pressure required. G-12 Visit www.GemsSensors.com for most current information. MFRS. P/N MFRS. S/N TYPE NO. OUT MAX IN CONTR. NO. STOCK NO. SPEC. MIN SWITCH-FLOW UL Approved Explosion-Proof PISTON TYPE How It Works Pressure Drop - Typical 0.5 GPM HERMETICALLY SEALED PERMANENT MAGNET SPDT SWITCH SPRING PISTON 2.5 2.0 1.5 Part No. 25357 1.0 0.5 0 VALVE ADJUSTMENT FLOW ADJUSTMENT HOUSING LOCKING SET SCREW VANE 0 0.5 1.0 2.0 FLOW RATE - GPM MAGNETIC SWITCH 10 GPM and 20 GPM 16 Flow diagram with switch 12 PISTON shown actuated. Part No. 25358 8 4 ADJUSTMENT 0 An externally rotatable vane is positioned in the main flow path within the unit. The 0 5 10 15 20 25 30 magnet carrier piston is located in a bypass flow chamber. Pressure differential, FLOW RATE - GPM caused by flow around the adjusting vane, displaces the spring-biased piston which Tests conducted with units in horizontal position with water at +70°F (21°C). Data will vary slightly for vertically mounted units. actuates a hermetically sealed SPDT reed switch within the unit. How To Order – Standard Models Specify Part Number based on desired media, piston material and electrical termination. Part Numbers Materials FS-10798 switches are U.L. Approved for Class I, With 1/2˝ Media With Lead Division 2, Groups A, B, C, D hazardous locations. Conduit Wires Housing Piston U.L. Approved — File No. E183854 Connector Brass (for Oils) 61205 49073 Brass Liquids Polysulfone (for Water) 25357 25363 Standard Wiring Color Code 316 Stainless Steel 25358 25364 Wire Color Terminal Brass 25359 25365 Orange N.O. Gases 316 Stainless Steel 25360 25366 Black Common Notes: Red N.C. 1. Temperature changes will slightly affect the standard water or gas flow settings listed. Oil flow settings will vary with temperature and viscosity. 2. Use of 50 micron filtration is recommended. – Stock Items. G-13 Visit www.GemsSensors.com for most current information. PRESSURE DROP (PSID) PRESSURE DROP (PSID) FLOW SWITCHES