Diaphragm operated spring loaded regulator

Details Diaphragm operated spring loaded regulator Diaphragm operated spring loaded regulator

1993-01-11

1993-08-24

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

13750522, G05D 1602

Patent

active

052380211

ABSTRACT:
A diaphragm controlled spring loaded regulator is disclosed. Such regulator is adapted to regulate the flow of compressed gas applied to a gas blanket on top of liquids in a storage tank and to other low pressure applications. The regulator includes a piston in a valve body with an "O" ring seat contacting an annular seating surface of the valve body. A compression spring is located on one end of the piston and a diaphragm actuator responsive to remote tank pressure is provided on the other end of the piston. At closure, the piston is pressure balanced. One arrangement is provided with a rollout seal in combination with an upper piston part and tapered cylinder walls such that after the piston begins to open, increased opening force is created due to inlet pressure acting on the upper piston part. As the piston begins to close, increased closing force is created due to inlet pressure. Another arrangement is provided such that with cracking of the "O" ring seat with the annular seating surface, pressure is adjustably increased in the lower part of the valve so as to act against a lower part of the piston so as to increase opening force.

REFERENCES:
patent: 353081 (1886-11-01), Patterson
patent: 3001550 (1961-09-01), Engel et al.
patent: 3111957 (1963-11-01), Broughton
patent: 3392749 (1968-07-01), Gneiding et al.
patent: 3545471 (1970-12-01), Taplin

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