Gerald J Bloom

US Patent:

6418956, Jul 16, 2002

Filed:

Nov 15, 2000

Appl. No.:

09/713776

Inventors:

Gerald Bloom - Spring Valley NY

Assignee:

Plast-o-Matic Valves, Inc. - Cedar Grove NJ

International Classification:

G05D 1606

US Classification:

137 14, 137488, 137492, 13759618

Abstract:

A pressure controller is provided for a pressure regulator. The pressure controller controls a pressure regulator to deliver process fluid at a regulated pressure from a variable supply. The pressure controller includes a control pressure source independent of the process fluid. One such pressure source could be compressed air which enters the controller through a restriction. The control pressure passes through the controller to the regulator where it exerts pressure on the pressure regulator. The controller is interconnected with the process fluid line at a point of regulation and senses pressure in a diaphragm chamber of the controller. A valve rides on the diaphragm and a bias is exerted against the valve to oppose pressure on the diaphragm. The bias tends to move the valve to a closed position. The bias means is adjustable.