Pressure relief valves are used in hydraulic systems to limit the system pressure to a specific set level.
If this set level is reached, the pressure relief valve responds and feeds the excess flow from the system back to oil tank.
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.