Abstract: An improved valve facing for one member of relatively sliding gate valve members. More specifically, the improved valve facing has foamed polymeric core and an impervious and solid polymeric outer surface. This combination provides the necessary resilient and deformable characteristics for effecting a long-life seal between the sliding members of the gate valve. When the valve is a drain valve of a fire hydrant most unexpected results are obtained.

Abstract: An automotive thermostatic valve which comprises a stationary portion and a movable portion. The stationary portion comprises a rigid frame member which includes a central portion and an outer annular portion. The outer annular portion is joined to the central portion by radially extending spokes. The outer annular portion of the rigid frame member is covered with a body of elastomeric material which is shaped to provide a valve seat surface for engagement by the movable portion of the valve and is also shaped to provide a securing region which is clamped within a fluid conduit within which the valve is positioned. The outer annular portion of the rigid frame member has a radial portion adjacent the valve seat surface of the body of elastomeric material for support thereof and a cylindrical portion adjacent the securing region of the body of elastomeric material for support and reinformcement thereof during clamping thereof within a fluid conduit within which the valve is positioned.

Abstract: An improvement is provided in a valve having a valve housing defining first and second valve openings and a valve sealing element in the housing. The improvement comprises a three-piece valve sealing element. That valve sealing element comprises a first hard retainer of metal or the like, a second generally cup shaped hard retainer of metal or the like and a resilient plastic component disposed between the first and second retainers and having an exposed sloped peripheral sealing surface which surface is adapted to engage the first valve opening defined within the valve housing. The second retainer has a curved peripheral surface engageable with the second valve opening within the valve housing, the two valve openings being spaced longitudinally from each other. The valve includes a valve stem connected to the valve sealing element for movement of said valve sealing element in the housing between the two valve openings.

Abstract: A valve for a flow regulator employed in a fluid system is disclosed. The flow regulator includes a housing defining an internal chamber and a fluid inlet and outlet communicating with the chamber each adapted to be connected to the fluid system. Mounted within the chamber is a reciprocating piston that is actuated by an external master piston. A backing element is also mounted within the housing. The valve includes an elastomeric inner member including a body with a circumferential layer of elastomeric material bonded to the body. The inner member is mounted between the piston and stationary backing member and upon being compressed by the piston, varies the flow area through the inner chamber. To protect the interface of the outer layer and the body from fluid flow, a shield may be placed along the backing member and the upstream end of the inner member.

Abstract: A lined gate valve having a seat proportioned such that the ratio of the unit bearing stress to the unit shear stress is substantially 0.68. In one form of the valve, the seat comprises a plastic ring having an embedded metal band. The seat is removable and is held in place by the end pressure of a pipe flange. The seat can be removed by tapping against the seat in an axially outward direction. In another form of the valve, the seat is integral but has the same proportions as above recited.

Abstract: The present invention provides an improvement in fluid flow control valves which utilize polymeric rubbery materials either as the valve member or the valve seat in the flow control valve. The improvements are obtained by utilizing as the rubbery material for either the valve seat or the valve, a semi-rigid to rigid rubbery material prepared by curing a nitrile rubber with from three to 15 parts of sulfur per 100 parts of rubber. Such cured rubbers when utilized in said application, have been found to overcome the problems exhibited by the rubbery materials heretofore used for such applications.

Abstract: A fluid flow controlling butterfly valve assembly is disclosed which comprises a valve body defining a through passage for fluid, a butterfly valving member supported within the body, a shaft extending transversely through the passage and drivingly connected to the valving member, and a shaft supporting structure rotatably supporting the shaft in the body while sealing against leakage from the valve.In a preferred embodiment the shaft supporting structure includes a band extending about the body and defining recesses aligned with shaft portions emerging from the body. Resilient flexible elements are disposed within the recesses and compressively engage the shaft and body to provide both bearings and seals.

Abstract: An automatic shut-off nozzle has its valve, which controls liquid flow from its inlet to its outlet, arranged to provide a minimum flow rate to prevent recycling of fuel irrespective of the angle of the fill pipe.

Abstract: A check valve comprising a housing having an annular abutment therein, a spring pressed guide in the abutment, an elastomeric disc on the guide, a conical head with an annular tapering groove facing the disc and a flat apex facing downstream, said guide having fluid passages open upon downstream pressure and the conical head and disc closing and stabilizing the valve upon lack of pressure or reverse pressure.

Abstract: An improved pneumatic piston apparatus is provided wherein a movable poppet valve member employs at least one composite member exposed to air pressure which varies dynamically during the operation of the apparatus. Delamination of the composite member and resultant malfunction of the poppet valve are avoided by a novel construction in accordance with the principles of the present invention, which excludes the dynamically varying air pressure from access to the interface between the layers of the separate materials comprising the composite member. The effect achieved by the novel construction is further enhanced by the manner in which the composite member is retained on the poppet valve member. Unwanted movement of the piston conjointly with the motion of the poppet valve member is precluded in the invention by providing an air space therebetween.