Diaphragm valve

Details Diaphragm valve Diaphragm valve

1987-04-20

1988-06-14

Chambers, A. Michael

Valves and valve actuation

Hermetic flexible wall seal for actuator

Diaphragm

251267, 251214, 137556, F16K 3100, F16K 3144

Patent

active

047507098

ABSTRACT:
A diaphragm valve which uses a multiple layer 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: 679062 (1901-07-01), Staedeli et al.
patent: 3982729 (1976-09-01), Tricini

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