Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent
1988-10-26
1989-11-21
Cohan, Alan
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
137492, G05D 1600
Patent
active
048815713
ABSTRACT:
A main valve includes a product pressure inlet, an outlet, a movable closure member and a pressurized head volume above the closure member. Product pressure relief flow through the main valve is controlled by a modulating, pressure operated pilot relief valve that includes a piston chamber with a reciprocally mounted pilot piston. The chamber is in fluid communication with the pressurized head volume and with the outlet and inlet of the main valve. An inlet valve controls flow from the inlet of the main valve into the chamber and is actuated by the pilot piston. A vent valve is mounted within the piston chamber and controls fluid flow from the piston chamber to the outlet of the main valve and is actuated by the pilot piston.
REFERENCES:
patent: 2649115 (1953-08-01), Deardorff
patent: 2849987 (1958-09-01), Shafer
patent: 2877791 (1959-03-01), Rich
patent: 3083726 (1963-04-01), Woelfel
patent: 3304951 (1967-02-01), Farris
patent: 3326228 (1967-06-01), Phillips
patent: 3357359 (1971-03-01), Weise
patent: 3362424 (1968-01-01), Smith et al.
patent: 3389718 (1968-06-01), Johnson et al.
patent: 3592224 (1971-07-01), Bois
patent: 3631878 (1972-01-01), VanderHorst
patent: 3664362 (1972-05-01), Weise
patent: 3716074 (1973-02-01), Peters
patent: 3754566 (1973-08-01), Gemigniani
patent: 3771553 (1973-11-01), Huet
patent: 3807439 (1974-04-01), Doe
patent: 4129141 (1978-12-01), Vogeli
patent: 4188011 (1980-02-01), Akkerman
patent: 4250913 (1981-02-01), Scull
patent: 4291721 (1981-09-01), Gemignani
patent: 4355657 (1982-10-01), Reip
patent: 4384590 (1983-05-01), Friend
patent: 4402341 (1983-06-01), Reip
patent: 4586533 (1986-05-01), Estes
Theisen, Terry J. and Reip, Raymond, G., "Second Generation High Performance Pilot Operated Safety Relief Valve--Non Flowing Modulating Pilot Valve," Pacific Oil World, Nov., 1984, pp. 68-69.
Brochure, "AGCO.TM. Series 400," May, 1986.
Cohan Alan
Dresser Industries Inc.
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