Controlling process gas flow

Details Controlling process gas flow Controlling process gas flow

1992-04-23

1993-10-19

Hepperle, Stephen M.

Fluid handling

Processes

Involving pressure control

1374875, 137906, G05D 1602, G05D 1620

Patent

active

052536696

ABSTRACT:
A method and apparatus for controlling the pressure to the bonnet of a pressure regulator, wherein two solenoid valves in combination with a buffer tank and a microprocessor to control the solenoid valves. When the pressure within the regulator bonnet exceeds a specified maximum value, one of the solenoid valves opens to allow the control pressure going to the regulator bonnet to be decreased. When the pressure in the regulator bonnet falls below a preset minimum value, the other solenoid valve opens to allow increased control pressure to enter the regulator and raise the regulator bonnet pressure to the level required.

REFERENCES:
patent: 1869791 (1932-08-01), Wright
patent: 2261364 (1941-11-01), Grove
patent: 2587728 (1952-04-01), Hoskins
patent: 3858598 (1975-01-01), Carman et al.
patent: 4253480 (1981-03-01), Kessel et al.
patent: 4901758 (1990-02-01), Cook et al.
patent: 4961441 (1990-10-01), Salter
patent: 5020564 (1991-06-01), Thoman et al.

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