Abstract: An improved gate valve comprising spaced parallel housing walls having axially aligned apertures therethrough and constituting a housing; sleeves removably coupled to the housing walls and defining an annular space therebetween; a gate plate in sliding contact with the sleeves reciprocable between open and closed positions and defining a primary seal to atmosphere between the gate plate and sleeves; packing located adjacent to the upper edges of the housing walls through which the gate plate reciprocates between open and closed positions and defining a secondary seal to atmosphere between the gate plate and the packing; and means associated with the periphery of the housing walls to retain flowing fluid within the housing walls.

Abstract: A gate valve comprising housing walls secured together in face to face relationship, a gate plate reciprocable between an upper open position wherein the gate plate is oriented for allowing the flow of fluid and a lower closed position wherein the gate plate is oriented for precluding the flow of fluid. Locking components are provided and comprise a first arm laterally offset from one housing wall and a second arm laterally offset from the gate plate for movement therewith. Each arm has a hole therethrough, the holes being in alignment when the gate plate is in the lower closed position. A pad lock is positionable through the holes for securing the gate plate against being raised to the upper open position when the gate plate is locked in the lower closed position.

Abstract: A gate valve formed with spaced parallel housing plates having axially aligned apertures which constitute a housing therebetween. Elastomeric sleeves line the apertures of the housing plates to provide an annular space between the sleeves. An elongated gate plate, having an apertured section and an imperforate section, is positioned in sliding contact with the sleeves. Actuator means reciprocate the gate plate between an open and closed position.