US 6,092,550 AGranted

Diaphragm valve seat arrangement

AssigneeSwagelok Marketing Co.

InventorsJames E. Gotch, Dale J. Kitchen, Maria T. Longo, Victor N. Rasanow, Philip J. Smith

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Abstract

A flow control device includes a first body and a second body; a threaded engagement for clamping the bodies together in an axially aligned relationship; a diaphragm seal that is disposed axially between the first and second bodies to form a seal there between; each of the first and second bodies having a generally flat surface portion near its respective outer periphery; at least one of the generally flat surfaces being adjacent an outer corner thereof; the diaphragm being singularly clamped between the generally flat portions; the diaphragm having an outer peripheral portion adjacent the generally flat surfaces and that bends over and seals at the corner.

Claims11

Dependent claims

A valve diaphragm seat arrangement for a diaphragm valve of the type having a first body with fluid inlet and outlet openings therein and a diaphragm for controlling flow between said inlet and outlet passages, the valve diaphragm seat arrangement comprising:

a first collar that surrounds one of said fluid openings and that extends axially toward said diaphragm;
a second collar that is radially spaced outward from said first collar to form a recess there between;
said second collar extending axially toward said diaphragm a distance substantially greater than said first collar;
a valve seat partially disposed in said recess;
said seat extending axially beyond said second collar and being retained in said recess by said first collar;
said seat having an upper surface that engages with and forms a seal with a portion of said diaphragm to close said one opening.

3 more elements

Dependencies are inferred from the claim text.