Apparatus for pressure detection and control of a safety valve

Details Apparatus for pressure detection and control of a safety valve Apparatus for pressure detection and control of a safety valve

1979-03-20

1981-09-29

Cohan, Alan

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

13759618, F16K 3112

Patent

active

042917212

ABSTRACT:
A safety valve for a pressure vessel, e.g. a marine boiler, comprises a piston-operated valve mounted on the pressure vessel and provided with a cylinder which is connected to a pressure detector. According to the invention, a pair of juxtaposed control valves are provided for selectively opening and blocking communication between the cylinder and the pressure vessel and between the cylinder and the atmosphere, respectively, these control valves being actuated by an element disposed between them and connected by a rod to a control piston which is displaced by the pressure in the vessel against the force of an adjustable spring.

REFERENCES:
patent: 1110320 (1914-09-01), Fulton
patent: 2113943 (1938-04-01), Kimball
patent: 2185671 (1940-01-01), Kimball
patent: 2977110 (1961-03-01), Kilgore
patent: 3754566 (1973-08-01), Gemignani

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