Pneumatically actuated valve

Details Pneumatically actuated valve Pneumatically actuated valve

1984-12-31

1987-04-14

Scott, Samuel

Valves and valve actuation

Fluid actuated or retarded

Piston type expansible chamber reciprocating valve actuator

13750528, F16K 31163

Patent

active

046572244

ABSTRACT:
The pneumatically actuated valve is of the type, which is normally closed, has a constant autocontrolled rate of flow and is particularly but not exclusively used in adsorption working installations for drying gases. The valve is capable of effecting a decompression at a constant rate of flow up to atmospheric pressure, and a successive venting of regenerating gases at atmospheric pressure. The valve comprises a valve member with a first orifice controlling a variable upwardly located section area of a second orifice having a fixed section area said orifices being separated by an annular chamber which is connected with one of the two section of a variable volume chamber through an axial passage of a spring-urged piston sub-diving the last-mentioned chamber in the two sections, the other section of the variable volume chamber being connected with a constant pressure pilot circuit.

REFERENCES:
patent: 635149 (1899-10-01), Schreidt
patent: 2721576 (1955-10-01), Grove et al.
patent: 2759699 (1956-08-01), Rush
patent: 2783020 (1957-02-01), Kleczek

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