Control valve

Details Control valve Control valve

1995-12-21

1998-04-21

Chambers, A. Michael

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

25112904, 1377875, F16K31240

Patent

active

057410020

ABSTRACT:
A control valve includes a valve body having an inlet port and an outlet port which receives an orifice plate mounted to the valve body. Set within the valve body is a plunger which cooperates with the orifice plate to selectively communicate the inlet port with the outlet port. The plunger is acted upon by a stem for displacement in an axial direction between a closing position and an opening position and provided with a servo system for maintaining the desired position of the plunger. The servo system includes a slide gate which is connected to the stem and opens and closes the fluid passageways between the inlet port, outlet port and a pressurizing chamber above the plunger.

REFERENCES:
patent: 4746093 (1988-05-01), Scanderbeg
patent: 4799645 (1989-01-01), Kramer et al.
patent: 4995586 (1991-02-01), Gensberger et al.
patent: 5271599 (1993-12-01), Kolchinsky et al.
patent: 5328148 (1994-07-01), Hartmut

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