Safety valve

Details Safety valve Safety valve

1989-04-26

1990-02-27

Michalsky, Gerald A.

Fluid handling

Systems

Supply and exhaust

91424, 13759618, F15B 13043

Patent

active

049037285

ABSTRACT:
A hydraulic safety valve which is controlled by electromagnetically actuated pilot valves includes two valve bodies movable in opposite direction towards each other for regulating the connections between a pump port, two working ports and two tank ports. Upon occurrence of a faulty switching, both valve bodies are moved in a hydraulically locked end position so that the safety valve can be operated again only after eliminating the malfunction. By coupling the safety valve with a proportional pressure reducing valve, the pressure buildup and the speed of a consumer which is connected to the safety valve can be controlled.

REFERENCES:
patent: 4473095 (1984-09-01), Motzer

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