Pressure Relief Valve Working Principle

Pressure relief Valve is one of the most important type of safety valve.

This type of valves sets a limit on the rise of pressure within a hydraulic line.In normal operation the valve is closed and no fluid passes through.But if the pressure in the line exceeds the limit the valve opens to relieve the pressure.This protects expensive machinery such as motors,pumps and actuators from becoming damaged from high pressure.

Without a relief valve the pressure can continue to grow until another component fails and pressure is released.

Two Types of Pressure Relief Valves are there.

1.Direct Acting
2.Pilot Operated 

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