Target Rock Corporation

Robert A Wells

Malcolm S McClintock

A self-modulating control valve for high pressure fluids, particularly gas in three interacting pressure chambers are provided in association with the main disc which includes two piston portions of different diameters, one of which operates as a spool valve to meter fluid flow through valving ports to a pressure stabilizing chamber formed in the main disc and also to the outlet side of the valve. Fluid flow to the pressure chamber which includes the large piston portion is through a metering orifice which drops the pressure in combination with unseating the valve, allowing the pressure in the chamber which includes the smaller of the piston portions to contribute the unseating forces for the main disc.

Self-modulating control valve for high-pressure fluid flow

The pressure responsive, pilot actuated, modulating valve comprises a main valve assembly which defines with the housing a first chamber and controls flow of fluid from an inlet port to an outlet port. A pressure responsive piston is provided which defines with the housing a second chamber. A vent passageway is provided in the piston for communicating the second chamber with the outlet port. A pilot valve assembly is provided to control flow through the vent passageway. A means is provided for selectively actuating the pilot valve assembly. A discharge orifice is comprised in the main valve assembly for communicating the vent passageway with the outlet port. A vent valve assembly is disposed to control flow of fluid between the first chamber and the discharge orifice. A restricted conduit means is disposed to coact with the main valve assembly to provide a variable flow area communicating the inlet port with the discharge orifice and the first chamber when the vent valve assembly and the main valve assembly are in an open position and which flow area varies in direct proportion to the amount the main valve assembly is open to thereby vary fluid pressure in the first chamber and provide forces on the main valve assembly which act counter to the direction of movement of the main valve assembly.

Pressure responsive, pilot actuated, modulating valve

An improved solenoid operated valve utilizing a pilot valve nested within a main valve having a dual mode capability, fluid pressure assisted or solenoid powered, wherein the main valve's stem section is mounted within a tubular pilot armature and stem for movement toward the main armature to thereby open the pilot valve and then the main valve.

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Huntington, NY, United States of America

Robert A Wells