Diaphragm valve

Details Diaphragm valve Diaphragm valve

1987-01-08

1988-03-22

Chambers, A. Michael

Valves and valve actuation

Hermetic flexible wall seal for actuator

Diaphragm

251367, F16K 3150

Patent

active

047323639

ABSTRACT:
A diaphragm valve which uses a multiple annular metal diaphragm welded about its inner periphery to a valve operating stem. The diaphragm is sealingly clamped about its outer periphery to the valve body and is also clamped about its inner periphery at a location spaced outwardly of the weld to prevent the weld from being subjected to flexure stresses during valve actuation. The actuating assembly is arranged to produce non-rotary, reciprocatory movement of the operating stem through a bonnet mounted rotary actuator. An improved stem tip seal arrangement is also disclosed.

REFERENCES:
patent: 2051350 (1936-08-01), Smith
patent: 3874636 (1975-04-01), Balce et al.
patent: 4199850 (1980-04-01), Velan
patent: 4231549 (1980-11-01), Visalli

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