Fast opening valve apparatus

Details Fast opening valve apparatus Fast opening valve apparatus

1984-06-13

1986-04-29

Scott, Samuel

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

60652, 91 27, 91 31, 91361, 91363R, 91363A, F16K 31363

Patent

active

045852057

ABSTRACT:
A fast opening valve apparatus includes an electronic sensing circuit to determine when a positional error signal exceeds a predetermined reference value corresponding to an opening rate reference value. The sensing circuit provides a fast open command signal which is applied to a solenoid valve which is hydraulically coupled in parallel with a control servo valve. The control servo valve hydraulically couples a primary source of hydraulic fluid under pressure to a valve actuator which is mechanically coupled to a valve stem of an associated steam valve desired to be controlled. The activated solenoid valve opens a supplemental hydraulic fluid path between the valve actuator and the primary source of hydraulic fluid. To ensure an adequate hydraulic fluid pressure at the input of the servo valve and solenoid valve, an auxiliary source of hydraulic fluid under pressure may be coupled upstream of the servo valve and solenoid valve.

REFERENCES:
patent: 3097488 (1963-07-01), Eggenberger et al.
patent: 3495501 (1970-02-01), Kure-Jensen
patent: 4040600 (1977-08-01), Coppola et al.
patent: 4065094 (1977-12-01), Adams
patent: 4121618 (1978-10-01), Sweeney
patent: 4215844 (1980-08-01), Bowen

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