In-line flow,pilot-operated high-pressure gas regulator

Abstract

Abstract 1,129,716. Fluid-pressure servomotor systems. FISHER-GOVERNOR CO. Aug. 22, 1966 [May 20, 1966], No.37616/66. Heading G3P. A fluid-pressure regulator comprises a main valve member 28 co-operating with a seat 31 to control the flow from an inlet 17 to an outlet 18, the valve being adjusted by an actuator diaphragm 36 which is subjected to downstream pressure in a chamber 48, spring loading 46 and a pilot controlled pressure in a chamber 50. The pilot controlled pressure is determined by a two stage pilot assembly which comprises a first differential pressure regulator valve 85 which controls the flow of inlet fluid through passage 94 to passage 106 in accordance with downstream pressure acting on piston 85a fed through passages 54 and 89 and the reduced pressure in passage 106 acting on the piston, thus the pressure in passage 106 fed to the second stage is at a constant pressure differential above the downstream pressure. The second stage pilot comprises a diaphragm 118 subjected to downstream pressure in chamber 123 and controlling supply and exhaust valves 110, 132. The diaphragm moves against a spring loading 150 to produce a pilot pressure in chamber 116 which is connected to the chamber 50 of the actuator. The actuator 36 is thus adjusted in response to changes in inlet and downstream pressure. The actuator 36 also moves a position indicator rod 70.

Inventors

• 👤 Tom K Buresh
• 👤 Ralph W Zeigler

Bibliographic Details