Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent
1998-04-17
1999-09-21
Ferensic, Denise L.
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
137613, 13761411, 13761413, 36452817, 36452836, F16K 3102
Patent
active
059540893
ABSTRACT:
A pair of serially connected electrically operated computer controlled gas valves combine with a pressure sensor to output pressure regulated low pressure gas dispensed from a high pressure gas source and define a pressure regulation system of relatively simple construction, great versatility and of heretofore unknown flexibility, well suited to remote control. The computer controlled valve controller selectively operates the valves in any and all of three operational modes, including the familiar Bang-Bang mode in which both valves operate simultaneously, a Bang-Wait mode in which both valves operate simultaneously for a precise time interval and thereafter close while the outlet gas pressure is checked, and a newly defined Burp mode. In the novel Burp mode, the valve closest to the high pressure gas source is first opened and closed to admit and capture a small volume of gas within inter-valve piping. Thereafter only the outlet valve is opened and closed to release that small volume of captured gas. Each small puff of gas captured and released during repetition of the cycle raises the outlet pressure ever so slightly until the desired pressure is sensed, thereby avoiding significant pressure overshoot.
REFERENCES:
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patent: 5269341 (1993-12-01), Nusz et al.
patent: 5677500 (1997-10-01), Ackerley et al.
patent: 5730166 (1998-03-01), Ackerley et al.
Farid Ramyar
Ferensic Denise L.
Goldman Ronald M.
TRW Inc.
Yatsko Michael S.
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