Valves and valve actuation – Fluid actuated or retarded – With mechanical movement between actuator and valve
Patent
1992-05-26
1993-06-01
Walton, George L.
Valves and valve actuation
Fluid actuated or retarded
With mechanical movement between actuator and valve
74110, 74519, 92130A, 92130D, 92140, 215 635, 215214, 215331, 215362, 215364, 215229, F16K 717, F16K 31122
Patent
active
052152863
ABSTRACT:
A diaphragm valve for high pressure use has a metal diaphragm which is actuated into and out of direct engagement with a valve seat by an air operator acting through a force multiplying lever assembly. The valve seat is confined by rigid interior and exterior sleeves while the sealing surface is contoured to have a concave configuration corresponding to the contour of the diaphragm in its deflected position. The air operator is provided with a stroke adjustment mechanism that is locked in adjusted position by a member that is generally accessible only when the operator is disconnected from the valve.
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Nupro Company
Walton George L.
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