Check valves, pilot operated

These hydraulic check valves are part of the shut-off valves according to 

DIN ISO 1219. With a hydraulic inlet in the connection Z the blocked flow

A→B can be opened. The flow B→A is permanently open. 

Pressure medium: Hydraulic oil 10 68 mm²/s, 

(ISO VG 10 to 68 according to DIN 51 519) 

An integrated ball check valve with a spherical grounded valve piston 

produces decompression. Already when opening the valve piston 

a throttle opening is released during the unlocking process. 

This dampens the pilot opening movement of the unlocking piston. 

Pressure surges in the load volume are suppressed by that. 

The check valves serve for blocking the supply line in the application

of hydro cylinders. The check valve with decompression is ideal for 

high operating pressures.