Description

Pneu-trol model PC4-21 pressure compensated constant flow valves are exceptionally accurate in maintaining constant flow with pressures up to 3,000 psi (207 bar). These non-adjustable units provide exact factory-set output flow, regardless of inlet pressure, up to rated limits.

Series 3 is a miniature 1/4″ valve for small flow rates. Series 4 is our standard fixed flow valve with flow capacity up to 30.0 gpm (113.6 lpm). Both Series 3 & 4 provide for “ restricted” reverse flow as limited by the internal orifice.

The compensating action of these valves results from a fixed diameter orifice at the inlet end and a series of variable orifices at the outlet end. Flow through the variable orifices is controlled by a spring and piston. These elements work together to regulate hydraulic flow within the determined rates.

Pneu-trol Part Reference: PC4-21

Features and benefits Include:

• For hydraulic applications only.
• Maintains accurate constant flow at pressures up to 3,000 psi (207 bar).
• Fixed (Factory-Set) flow units.

Additional information