Adjustable Accessories Flow Control Valves 4 Brass Body  1/4" to 3/4" NPT Features • Adjustable flow control design provides greater capacity than most constructions. • Spring-loaded disc allows free flow in one direction and an adjustable flow in the other. • Tapered brass stem controls flow through the cross-hole in the disc. • Unique locking device in adjusting knob. • Scribed graduations provide position indication for the stem. • Mountable in any position. Construction Nominal Ambient Temperature Ranges: 125˚F (52˚C) maximum. Valve Parts in Contact with Fluids Refer to Engineering Section for details. Body and Stem Brass Seals NBR Disc CA Spring 302 Stainless Steel Operation: Retainer 17-7PH Stainless Steel When the pawl is in the up position, it creates a friction lock on the knurled bonnet and the knob cannot rotate. When the pawl is at 90˚ to the knob, the knob can be rotated. Refer to Engineering Section for details. Specifications (English units) Cv Flow Maximum Operating Pressure Factor ➀Differential (psi) Pipe Orifice Size Size Meter Free Opening Air-Inert Gas, Max. Fluid (ins.) (ins.) Flow Flow Pressure (psi) Water, and Light Oil Temp. ˚F Catalog Number 1/4 3/8 .22 1.2 1 300 180 V022A1 3/8 3/8 .90 1.4 1 300 180 V0222 1/2 7/16 1.2 2.6 1 300 180 V0223 3/4 17/32 1.6 4.0 2.5 300 180 V0224 Note: ➀ Refer to Chart A for Cv vs. Metering Stem Turns. Specifications (Metric units) Kv Flow Factor Maximum Operating Pressure (m3/h) ➀Differential (bar) Pipe Orifice Size Size Meter Free Opening Air-Inert Gas, Max. Fluid (ins.) (mm) Flow Flow Pressure (bar) Water, and Light Oil Temp. ˚C Catalog Number 1/4 10 .2 1.0 0.07 21 82 V022A1 3/8 10 .8 1.2 0.07 21 82 V0222 1/2 11 1.0 2.2 0.07 21 82 V0223 3/4 13 1.4 3.4 0.17 21 82 V0224 Note: ➀ Refer to Chart A for Cv vs. Metering Stem Turns. 9.03 Accessories 4 Dimensions: inches (mm) Catalog H L M P W Number V022A1 3.12 2.69 1.91 2.62 1.31 79 68 49 67 33 H P V0222 3.12 2.69 1.91 2.69 1.31 79 68 49 68 33 FREE FLOW METERED FLOW V0223 3.34 3.22 2.28 2.81 1.31 N.T.P. BOTH ENDS 85 82 58 71 33 (SEE TABLE) V0224 3.75 3.69 2.75 3.09 1.47 W M 95 94 70 79 37 L ASCO Flow Control Valve 3 Way Control Valve (Solenoid, air, hydraulic, manually, etc., Cylinder, diaphragm, clutch, operated or fluidic interface.) brake, etc. Close Connection Two direction Press. control Cyl. Controlled Flow Exh. Flow may be controlled in either direction, opposite direction will be unrestricted. FLOW DIAGRAMS CHART A Example I: A 1/2" N.P.T. flow control valve is required to pass 3 GPM of water at a Δp of 16 psi. Determine the position of the metering stem. 3 GPM Cv = Cv = = 0.75 √ Δp √ 16 From the graph for the 1/2" N.P.T. flow control valve with a Cv of .75, the stem METERED FLOW FREE FLOW should be positioned three turns out from fully closed. SIZING EQUATIONS Example II: To determine the flow using Flow Characteristics GPM the same data of 16 psi, Δp and METERED WATER Cv = GPM = Cv √ Δp for ASCO Flow Control Valves Cv of .75, the solution will be: √ Δp SCFH AIR Cv = GPM = Cv √ Δp = .75 √ 16 = 3 2.0 Δp(P + P ) 12 Metered 960 √ Example III: The flow through this valve in the Flow 3/4” GT FREE FLOW position is: 1.5 Metered Δp(P + P ) 12 Flow 1/2” SCFH = Cv 960 √ GPM = Cv* √ = 2.6 √ = 10.4 Δp 16 GT Metered Cv 1.0 *Cv is obtained from free flow data table. Flow 3/8” Free Flow Data Pipe Size Cv P - Inlet Pressure (PSIA) 1 0.5 P - Outlet Pressure (PSIA) Metered 2 1/4 1.2 Flow 1/4” Δp - Pressure Drop (P - P ) psi 1 2 3/8 1.4 0 G - Specific Gravity of Gas @ 14.7 PSIA and 60˚F. 14 23 56 78 1/2 2.6 T - Absolute Temperature of Flowing Medium (˚F + 460) 3/4 4.0 METERING STEM TURNS 9.04