Pressure Relief & Sustaining Valve
Model 50-01/650-01

Watermark and StandardsMark approved to AS5081.

  • 50-01/650-01
  • Accurate Pressure Control
  • Optional Check Feature
  • Fast Opening to Maintain Line Pressure
  • Slow Closing to Prevent Surges
  • Completely Automatic Operation

The Cla-Val Model 50-01/650-01 Pressure Relief Valve is a hydraulically operated, pilot-controlled, modulating valve designed to maintain constant upstream pressure within close limits. This valve can be used for pressure relief, pressure sustaining, back pressure, or unloading functions in a by-pass system.

In operation, the valve is actuated by line pressure through a pilot control system, opening fast to maintain steady line pressure but closing gradually to prevent surges. Operation is completely automatic and pressure settings may be easily changed.

If a check feature is added, and a pressure reversal occurs, the downstream pressure is admitted into the main valve cover chamber, closing the valve to prevent return flow.

  • DN25-DN900

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Data Sheet