| General Description | ||||||
| Important | Optional Enclosures | |||||
| Operation | Nominal Ambient Temperature | Valve Parts in Contact with Fluids | ||||
| ASCO's patented adjustable flow control design has greater flow capacity than most conventional constructions where a separate adjustment speed control and ball check for free flow are utilized. A spring loaded disc allows free flow in one direction and an adjustable or controlled flow in the opposite direction. Flow adjustment is performed by a tapered brass stem that controls the flow through the cross hole in the disc. |
Valves may be mounted in any position. The adjustable knob contains a unique locking device that consists of a plastic metering knob and thumb latch pawl. The valve bonnet is scribed with graduations to serve as a position indicator for the stem |
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 is free to rotate. | 125°F Maximum. | Body and Stem -- Brass Seals -- Buna "N" Disc -- Acetal Spring -- 302 s.s. Retainer -- 17-7PH s.s. |
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| Catalog Number | Pipe Size (ins.) | Orifice Size (ins.) | CV Flow Factor ¹ | Operating
Pressure
(psi) |
Maximum Operating
Pressure Differential (psi) |
Max.
Fluid Temp.
°F |
|
| Meter | Free | Air-Inert Gas, Water and Light Oil | |||||
| V022A1 | ¼ | ³/8 | .22 | 1.2 | 1 | 300 | 180 |
| V0222 | ³/8 | ³/8 | .90 | 1.4 | 1 | 300 | 180 |
| V0223 | ½ | 7/16 | 1.2 | 2.6 | 1 | 300 | 180 |
| V0224 | ¾ | 17/32 | 1.6 | 4.0 | 2.5 | 300 | 180 |
| NOTE: 1 -- Refer to Chart A for Cv vs. Metering Stem Turns. | |||||||
Chart A
Flow Characteristics
for ASCO Flow Control Valves Metering Stem Turns
|
Example I: A ½" N.P.T. flow control valve is required to pass 3 GPM of water at a p of 16 psi. Determine the position of the metering stem.
From the graph for the ½" N.P.T. flow control valve with a Cv of .75 the stem should be positioned three turns out from fully closed. Example II: To determine the flow using the same data of 16 psi, 
and METERED Cv fo .75, the solution will be:GPM = Cv
= .75 
= 3Example III: The flow through this valve in the FREE FLOW position is: GPM = Cv*
= 2.6
= 10.4*Cv is obtained from the free flow data table. P1 -- Inlet Pressure (PSIA) P2 -- Outlet Pressue (PSIA)  p --
Pressure Drop (P1 - P2) psiG -- Specific Gravit of Gas @ 14.7 PSIA and 60°F T -- Absolute Temperature of Flowing Medium (°F + 460) |
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| Sizing Equations | ||||||
| Water | Air | |||||
| Cv = | GPM |
Cv = | SCFH 960  |
=.75 | ||
| GPM = Cv |
SCFH = | Cv 960 | |
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