Daniel Industries, Inc.

Kenton Chickering, Iii

Kee W Kim

Alberto L Hinojosa

Bela Vaczi

A sealing assembly for valves incorporates an annular rigid seat member forming a reference face sealing surface and having a circular seal recess receiving a circular sealing member and a circular seal retainer member which project forwardly of said reference surface for sealing engagement with said working surface. The sealing element forms radially inner and outer stepped sealing surfaces which establish sealing engagement with the working surface of the valve element at various pressure conditions. The rigid seat element defines a cylindrical outer spring retainer recess which receives a plurality of compression springs for spring urged movement of the seat assembly toward the working surface of the valve element. A spring retainer and positioner element formed of a thin strip of sheet material defines spaced spring receptacles separated by spacer segments. The spring retainer and positioner positions the compression springs in substantially equally spaced relation about the spring retainer recess and secure them against inadvertent movement. One or more locking clips secure at least one of the positioner segments in intimate locked relation with the cylindrical surface of the spring retainer recess.

Spring urged seat assembly for valves

A gate valve mechanism is provided which is especially designed for use as a hot tap valve. The valve incorporates a fabricated valve body having internal seat rings with circular elastomer sealing elements disposed within circular sealed grooves formed therein. A slab gate member is movable between the seat members between open and closed positions and is positionable radially outwardly of the seal grooves to permit replacement of the elastomer seal members. The valve body structure is of minimal thickness to permit access to the seal members through the flow ports of the valve in order to permit seal replacement. The valve also incorporates an internal rotatable threaded drive stem which receives a drive nut interconnected with the gate to thus permit opening and closing movement of the gate member by simply rotating the valve stem. The seat rings accomplish venting of the seal groove to the valve chamber and metal internal sealing lands to prevent seal extrusion and damage upon valve opening and closing movement.

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Simonton, TX, United States of America

Kenton Chickering, Iii