Hydraulic Barrel Type Unidirectional Flow Control Valve, VRF 1/4

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Barrel Type Unidirectional Flow Control Valve, VRF 1/4", Max Flow 20 L/min, Max Pressure 300 Bar, Cracking Pressure 0,5 Bar

  • 1/4" BSP
  • Max Flow 20 L/min
  • Max Pressure 300 Bar
  • Cracking Pressure 0,5 Bar


These valves are used to adjust speed of actuators in one direction, flow is free in the reverse. Pressure compensation is not provided, flow rate depends on pressure and oil viscosity.



Body: zinc-plated steel.

Internal parts: hardened and ground steel.

Seal: BUNA N standard.

Tightness: by diameter combination. Minor leakage with closed valve.



Connect V to the supply flow and C to the actuator to be controlled. The flow is adjusted from C to V and free in the reverse direction. When used on actuators with double pilot check valves, the VRF has to be mounted between the actuator and the double pilot check valve. Flow adjustements are made by rotating the coupling: clockwise rotation increases the flow and vice versa. Once the flow has been set, tighten the lock nut in order to keep the desired setting in case of vibrations.


 Oil temperature 50° C – Oil viscosity: 30 cST

More Information
Brand Oleodinamica Marchesini
Flow Rate 20 L/min
Port Size 1/4 BSP Ports
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