Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1995-07-07
1998-03-10
Chambers, A. Michael
Fluid handling
Processes
Cleaning, repairing, or assembling
13732901, 251359, F16L 5518
Patent
active
057250073
ABSTRACT:
A diaphragm valve including a main valve body and a ring member welded to the main valve body, and a flexible diaphragm having an outer periphery welded to the ring member. The weldment between the main valve body, the ring member, and the diaphragm, provide a hermetic seal for the chamber cavity of the diaphragm valve. The diaphragm may include an inner periphery welded to an axially movable valve member, also for providing a hermetic seal of the chamber cavity. In other embodiments, the outer periphery of the diaphragm is clamped to seal the chamber cavity by a bonnet being welded to the valve body.
A seal arrangement includes a groove provided in a surface surrounding a port, and an elastic sealing material disposed in the groove. The sealing material includes a portion extending out of the groove, and the groove and sealing material are configured so as to provide a void between the extending portion and the sidewall portions of the groove such that material may elastically fill the void when it is engaged by a valve member, and such that it may return to its original shape upon disengagement of the valve member without substantial permanent deformation.
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