Parallel slide gate valves and related methods

Abstract

A parallel slide gate valve includes a valve body comprising an interior surface, and an obturator therein. A portion of the interior surface defines a groove having a longitudinal axis oriented substantially peipendicular to a direction of flow through the valve body. The groove has a first width at a first end proximate to the fluid flow path and a second width at a second end distal from the fluid flow path, the second width smaller than the first width. The obturator is at least partially within the at least one groove. The obturator is configured to translate from the first end of the atleast one groove toward the second end of the at least one groove as the obturator moves from a closed position to an open position.

Description

[0001] priority statement [0002] This application claims the benefit of the filing date of U.S. Patent Application Serial No. 14 / 696,321, filed April 24, 2015, entitled "Parallel Slide Gate Valves and Related Methods." technical field [0003] Embodiments of the present disclosure relate to valves with translatable obturators, such as gate valves with parallel sliding gates. Background technique [0004] Many valve types are used to stop and control fluid flow in pipes or other flow paths. The various types of valves offer certain advantages and disadvantages. Some valve types include plug valves, ball valves, stop or globe valves, angle valves, butterfly valves, and gate valves. [0005] Wedge gate valves have a gate shaped as a wedge with two oppositely inclined flat faces (usually metal) each sealing against a portion of a seat of the valve's body. Both the face of the gate and the corresponding surface of the valve seat are typically machined to allow the gate to f...

AI Technical Summary

Problems solved by technology

[0007] Failure of the bracket 28 may cause the halves 24a, 24b to become disengaged from each other such that the gate 24 cannot move back into the inner passage 20 to close the gate valve 10

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