Pressure Relief Valves

Pressure Relief Valves

 

Function:

Limits the maximum pressure in a circuit.


Setting:

Generally set 15 bar above the working pressure of system.


Back pressure - Changes in pilot drain or backpressure will generally be added to the set pressure; making a sequence valve.


Variations:

Direct acting - quick response, low flow, leak free.


Pilot operated - high flow, internal or external leakage.


Unloading valve - e.g. relief valve that switches to minimum pressure for start up.

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