Pull type relay valve with automatic lockout

Details Pull type relay valve with automatic lockout Pull type relay valve with automatic lockout

1980-11-10

1982-12-21

Michalsky, Gerald A.

Fluid handling

With indicator, register, recorder, alarm or inspection means

Fluid pressure responsive indicator, recorder or alarm

137458, 13762566, F15B 13042

Patent

active

043644120

ABSTRACT:
A manually set relay valve (38) for controlling fluid flow to and from a valve actuator (14). A slide valve (60) is manually pulled outwardly to the set or open position and held therein by pilot pressure applied to a piston chamber (46) through a passage (110) in the slide valve (60). When the slide valve (60) is tripped to the closed position due to an interruption of pilot pressure, a cross port (112) of the fluid passage (110) vents the piston chamber (46) to maintain the relay (38) closed until manually reset.

REFERENCES:
patent: 4121615 (1978-10-01), Bergeron
patent: 4239058 (1980-12-01), Peters

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