Redundant pilot valve control system

Details Redundant pilot valve control system Redundant pilot valve control system

1985-04-12

1987-06-16

Cohan, Alan

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

251 26, F16K 3138

Patent

active

046729950

ABSTRACT:
In the preferred and illustrated embodiment, a safety relief valve, subject to control of redundant pilot valves with a control system, is set forth. A safety relief valve is ordinarily installed in a fail safe circumstance; accordingly, this control system incorporates redundant pilot valves which respond independently of one another having outputs utilized in the control system to trigger operation of the safety relief valve. The control system has, in its preferred form, an elongate body mounting redundant pilot valves on common manifold passages. If any pilot valve forms a signal requiring operation of the safety relief valve, that signal for the safety relief valve adjusts the setting of the safety relief valve.

REFERENCES:
patent: 1830927 (1931-11-01), Campbell et al.
patent: 3411530 (1968-11-01), Powell
patent: 3807438 (1974-04-01), Posipsek
patent: 3920040 (1975-11-01), Powell
patent: 4201362 (1980-05-01), Nishimi et al.
patent: 4402341 (1983-09-01), Reip

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