초록 ▼

A diaphragm valve includes a valve body adapted to receive a replaceable diaphragm subassembly. The subassembly includes a sleeve closely received in the valve body. An actuating stem extends through the sleeve and includes a composite diaphragm welded at one end. An intermediate portion of the stem

A diaphragm valve includes a valve body adapted to receive a replaceable diaphragm subassembly. The subassembly includes a sleeve closely received in the valve body. An actuating stem extends through the sleeve and includes a composite diaphragm welded at one end. An intermediate portion of the stem is threadedly received in a closure ring. The closure ring defines a radial gap with a closing gap to permit adjustment of the stem relative to a valve seat. A peripheral portion of the composite diaphragm is clampingly engaged between the valve body and sleeve. The composite diaphragm includes a metal layer having an elastomer bonded to one face to provide superior sealing and strength properties.

대표청구항 ▼

A diaphragm valve comprising: a body having an inlet and outlet operatively communicating across a valve seat defined in an enlarged recess in the body; and, a diaphragm subassembly adapted for receipt in said body recess, said subassembly including (i.) a sleeve dimensioned for close receipt in sai

A diaphragm valve comprising: a body having an inlet and outlet operatively communicating across a valve seat defined in an enlarged recess in the body; and, a diaphragm subassembly adapted for receipt in said body recess, said subassembly including (i.) a sleeve dimensioned for close receipt in said body recess, (ii.) a flexible composite diaphragm having a solid, generally circular configuration received adjacent one end of said sleeve and being clampingly engaged along a peripheral portion between said sleeve and body to define a primary seal, (iii.) an actuating stem received through said sleeve and having a first end fixedly secured to said diaphragm without extending therethrough, said stem having a first portion adapted for selective, reciprocative movement relative to said sleeve, a second portion adapted for both rotational and reciprocative movement relative to said sleeve, and means interconnecting said stem first and second portion for limiting transfer of torque from said stem first portion to said stem second portion, (iv.) a closure ring receiving said stem second portion therethrough, said closure ring including a threaded portion for advancing and retracting said stem, (v.) a secondary seal interposed between said stem and sleeve, and cap means for securing said diaphragm subassembly to said body, said closure ring having a portion extending into said sleeve and an intermediate radial portion being supported by said sleeve, said cap means having a portion extending into engagement with said sleeve and a radial portion of said cap means being in engagement with said closure ring radial portion, said radial portions defining gaps therebetween to permit radial adjustment of the closure ring prior to final tightening of the cap means so that the axis of the actuating stem is accurately aligned relative to the valve seat.