Spring loaded pilot-operated check valve
If the inlet pressure at 1 is higher than the outlet pressure at 2 and the nominal pressure, then the check valve allows the flow to pass, otherwise it blocks the flow. Additionally, the check valve can be released using the pilot line 12, thus enabling the flow in both directions.
|Opening pressure||0 ... 2 MPa||0.1|
|Pressure regulation range||0.01 ... 1 MPa||0.05|
|Area ratio||0.1 ... 10||3.3|
|Standard nominal flow rate||0.1 ... 5000 l/min||108|