The ERVPM is used for leakage free shutoff and active opening of flow rates up to 63 l/min. Releasing takes place in two stages with a pilot pressure (unlock pressure) at port X. At low unlock pressure (from 1/10 of working pressure) opens only a smaller valve section. The complete cross section opens at ¼ of the working pressure.
The compact design allows the integration directly to the cylinders and motors. Besides the load holding function this configuration provides a higher stiffness in the system.
Omitting the locking screw the pilot pressure port can be tubed directly at the outer face.
|Hydraulic fluid||Mineral oil according to DIN 51524 (other fluids on request)|
|Fluid temperature range||– 25 up to 80 °C|
|Ambient temperature range||– 25 up to 80 °C|
|Viscosity range||5 up to 400 mm2/s|
|Max. operating pressure connection A, P, X||500 bar|
|Max. flow rate||63 l/min|
|Filtration||According to ISO/DIN 4406 class 17/15/12|
|Cracking pressure (check valve RV)||0.3 +0.1 bar|
|Unlock pilot pressure ratio||1. phase: 1:10|
2. phase: 1:2.5
|Min. unlock||pilot pressure 2.5 +0.5 bar|
|Pressure drop||1. phase: 200 bar at 50 l/min|
2. phase: 6 bar at 50 l/min