Test valve for fluid actuated pilot valve

Details Test valve for fluid actuated pilot valve Test valve for fluid actuated pilot valve

1975-12-24

1976-10-26

Nilson, Robert G.

Fluid handling

Systems

Multi-way valve unit

73 4R, 137458, G01L 2700

Patent

active

039878171

ABSTRACT:
A test valve is positioned to block off a primary fluid pressure source acting on a pilot valve means and to provide communication with an alternate test fluid pressure source for testing the pilot valve means. The test valve has a central bore in which a depressible plunger is positioned for longitudinal movement between a seated extended position blocking the primary fluid pressure source and simultaneously commmunicating test fluid to pilot valve means, and an unseated retracted position in which the alternate fluid pressure source is sealed and blocked by an annular sealing member. The plunger has the annular sealing member adjacent its inner end in sealing contact with the adjacent surface forming the bore and positioned inwardly of a discharge passage in the plunger for the alternate fluid source. A hollow detachable stinger member which seats the plunger provides the test fluid and has a manual control thereon which selectively supplies the test fluid to the test valve.

REFERENCES:
patent: 2548957 (1951-04-01), DiRosa
patent: 3049148 (1962-08-01), Richardson
patent: 3817282 (1974-06-01), Peters
patent: 3927553 (1975-12-01), Frantz

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