Gas saving back pressure device

Details Gas saving back pressure device Gas saving back pressure device

1992-07-31

1993-01-12

Cohan, Alan

Fluid handling

Processes

Involving pressure control

137488, 251 25, G05D 1600

Patent

active

051781778

ABSTRACT:
A back pressure control device is connected to the actuator of a control valve to limit the amount of gas released from the actuator after each actuation. Approximately two thirds of the volume of the actuation gas is retained in the actuator by the subject device after each actuation, this being both the release of a sufficient volume to assure actuation of the control valve while retaining gas which was heretofore wasted.

REFERENCES:
patent: 3604679 (1971-09-01), Pennington
patent: 3664362 (1972-05-01), Weise

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