Pressure relief valves are used in hydraulic systems to limit the system pressure to a specific set level.

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If this set level is reached, the pressure relief valve responds and feeds the excess flow from the system back to oil tank.

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Hidros provide inline pressure relief valves with different setting ranges. VMPDI series have two port cross relief valves that limit the pressure in two ports of a cylinder/hydraulic motor to a certain setting. They are ideal to provide protection against sudden shock pressures. 6 ports (2 inlets and 4 reversible outlets) enable to use just one valve for two cylinders.