Gate valve with poppet closure

Details Gate valve with poppet closure Gate valve with poppet closure

1988-02-22

1989-03-28

Nilson, Robert G.

Valves and valve actuation

With means to increase head and seat contact pressure

Fluid pressure

251 82, F16K 318

Patent

active

048157023

ABSTRACT:
A gate valve which prevents the accumulation of pressure within the valve housing when closed is disclosed. The device employs poppets which are located on both sides of a shuttle carried in the gate structure and movable transversely thereto. The shuttle fits in the gate structure in a manner to facilitate the communication of fluid throughout the valve housing so as to equalize, in the closed position, pressure throughout the valve housing, with upstream line pressures. The device also is reversely operable to respond to pipeline backflow.

REFERENCES:
patent: 1548634 (1925-08-01), Schiller
patent: 2750962 (1956-06-01), Kreitchman
patent: 2941779 (1960-06-01), Saar
patent: 3768774 (1973-10-01), Baugh

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