Pilot control relay valve apparatus

Details Pilot control relay valve apparatus Pilot control relay valve apparatus

1981-10-26

1984-04-17

Chambers, A. Michael

Fluid handling

With indicator, register, recorder, alarm or inspection means

Fluid pressure responsive indicator, recorder or alarm

137556, 137458, 13762566, F16K 1700

Patent

active

044428600

ABSTRACT:
An improved pilot control relay valve is disclosed to monitor pressure conditions in a system and to shut down in response to the detection of pilot pressure outside a predetermined range. Dual piston action actuates a visual indicator mounted on the slide valve of the control relay valve.

REFERENCES:
patent: 3823739 (1974-07-01), McMullen
patent: 3877484 (1975-04-01), Theriot et al.
patent: 4073466 (1978-02-01), Snyder
patent: 4160463 (1979-07-01), Akkerman et al.
patent: 4173986 (1979-11-01), Martin

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