Rate of Flow/Non-Surge Check Valve 

The rate of flow/non-surge check valve shall function to control or limit the flow rate, regardless of fluctuations in upstream or downstream pressure. If downstream pressure becomes greater than upstream pressure, the valve will close fully to prevent reverse flow.

The OCV 120-6 has a wide range of applications – anywhere the flow rate must be controlled or limited and reverse flow must be prevented. Therefore, it has an ideal application as a pump discharge
control valve.


  • Controls or limits flow to a predetermined rate
  • Built-in orifice plate for sensing flow rate
  • Check feature closes valve on pressure reversal
  • Extra-sensitive differential pilot
  • Flow rate is adjustable with single screw
  • Adjustable response speed
  • Can be maintained without removal from the line
  • Factory tested and can be preset to your requirements