Relief valve improvement

Details Relief valve improvement Relief valve improvement

1977-03-09

1979-04-10

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

Line flow effect assisted

137492, 137526, F16K 1734

Patent

active

041483359

ABSTRACT:
The purpose of the invention is to provide a pilot-valve-controlled safety valve for venting excess pressures without allowing any noxious gas to exhaust to atmosphere in the vicinity of personnel.
This purpose is achieved by the provision of a safety valve and pilot valve combination with a connection from the pilot valve to an exhaust duct of the main safety valve. Control of the exhaust rate from the pilot valve is effected by the provision of a divergent nozzle at the downstream end of the pipe leading from the pilot valve.
The invention is of particular value when applied to a storage vessel for natural gas or a natural gas pipeline.

REFERENCES:
patent: 2308583 (1943-01-01), Berges
patent: 2690758 (1954-10-01), Lee
patent: 2890714 (1959-06-01), Greenwood
patent: 3592224 (1971-07-01), Bois

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