Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator
Patent
1986-10-24
1989-01-03
Walton, George L.
Valves and valve actuation
Fluid actuated or retarded
Piston type expansible chamber reciprocating valve actuator
1376253, 13762537, 137907, 251 635, 251282, F16K 31122
Patent
active
047951311
ABSTRACT:
A vacuum controller for controlling the vacuum at a controlled vacuum which includes a balanced piston arrangement coupled to a valve piston reciprocal with respet to a valve seat positioned between the controlled vacuum and a high header or source vacuum. A throttling of the header vacuum takes place across the space between the valve piston and valve seat and is such that the header vacuum does not influence the movement of the valve piston.
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AES V-700 Vacuum Control Valves by Albany International Engineered Systems Division (pp. 1-4, undated).
Bolton Joseph A.
Scarano Robert V.
Albany International Corp.
Walton George L.
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