Abstract: A valve disk assembly comprising an inverted cup-like holder accommodating a resilient disk, and being devoid of any fastening means for retaining the disk in the holder. The disk has a hole extending between its faces through which the region between the disk and the top wall of the holder communicates unobstructedly with the low pressure region surrounded by the valve seat when the disk is seated on the valve seat to close the valve. Sealing means, which may be a peripheral lip carried by the disk, restricts flow of high pressure fluid from beneath the disk into the region between the disk and holder. The top wall of the holder may be imperforate or have a hole aligned with the hole in the disk, depending upon the type of valve with which the disk assembly is used.

Abstract: A straight compression valve is disclosed in which shutoff of flow of fluid is effected between surfaces of plastic material, but in which a washer of non-metallic material may be employed under certain conditions. When the washer is not used, the design of the sealing surfaces is such as to obtain a highly effective shutoff with a minimum of closing pressure, while avoiding breakage of parts of the valve adjacent the sealing surfaces. Means are provided for controlling the movement of the valve stem to prevent breakage of the valve bonnet and other parts during closing of the valve. The valve body is provided with flats or flat surfaces which are so disposed or positioned in relation to the valve as a whole as to enable the valve to be clamped in a vise for facilitating access to the stem and other parts of the valve. The use of packing glands is avoided through the use of an O-ring and its structural location in the valve.

Abstract: The valve closure element has an annular peripheral groove opening outwardly onto the periphery of the closure element. An annular sealing element has an annular heel portion disposed in the groove. The latter has an inner end face whose diameter is less than the inside diameter of the heel portion. The groove is defined laterally by two confronting annular faces of the closure element which have a substantially rectilinear generatrix and grip the heel portion so as to prevent relative movement of the heel portion and closure element.

Abstract: The invention relates to machine welded obturators of generally spherical shape for equipping rotary plug valves. These obturators are composed of a central tube and an envelope formed by two hemispherical segments of pressed sheet metal which are truncated by two planes perpendicular to their diametral plane and which are welded on the one hand to one another in a diametral plane passing through the axis of the tube and through the axis of rotation and on the other hand, to two ends of the central tube, and at its outer surface, in a plane parallel to its diametral plane, each segment carries a sealing bearing or a seal in a groove.

Abstract: A check valve assembly is disclosed. A hollow valve body is provided with respective upstream and downstream ends. A valve seat is located on the interior of the valve body and has an annular seating surface directed toward the downstream end of the valve body. The seating surface is inclined at an acute angle relative to the centerline of the valve body. A poppet element is provided which has a circumferential surface with a relatively narrow neck proximate the valve seat. The circumferential surface of the poppet element on the downstream side of the neck has a frustoconical configuration. A deformable resilient O-ring circumscribes the poppet element at the neck. The outer diameter of the O-ring is greater than the inner diameter of the annular seating surface of the valve seat so that the flow of fluid through the valve body from the downstream end to the upstream end presses the O-ring against the seating surface to close the valve.

Abstract: A valve construction including a seat, a rotatable stem shiftable endwise toward and away from the seat, a washer carried by the stem for movement therewith into and out of closing relation with the seat, the washer being rotatable relative to the stem for nonrotative bearing engagement with the seat, and interfitting guide means for holding the washer against rotation relative to the seat upon movement of the washer into and out of its sealing engagement with the seat.

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.

Abstract: This invention relates to the sealed faucet valve assembly which is particularly designed to repair corroded or damaged valve stem mechanisms without replacement of the entire faucet. Included is a novel faucet washer assembly which provides a sealed chamber to protect the securing screw from contact with corrosive liquids.

Abstract: An improved valve for high speed, high pressure pumps, having a dished, rectangular-sectioned, radially stretched seal overhanging the valve body to both cushion and seal the body's closure against the valve seat, and which is pre-stressed in tension sufficiently to stiffen against pinch off under the high fluid pressures of, and to attain full elastic shape recovery in the very brief time interval between the valve closings of, such pumps.

Abstract: A pressure regulator with a spring loaded diaphragm having spring pressure and atmospheric pressure on one side and line pressure on the other for moving a valve stem in a valve seat for controlling downstream pressure. A soft seat design utilizing a metal seat in the regulator body and a resilient valve insert carried on the valve stem for engaging the seat. An annular flexible insert carried in an annular groove in the valve stem.

Abstract: A valve assembly comprises a valve carrier slidably received in a central bore of a valve body, a valve washer assembly mounted for movement with the carrier, the washer assembly including at least one spherically shaped contact surface for contacting an annular seat located between inlet and outlet ports of the valve.

Abstract: A rotary control valve has a plug in the form of a cup shaped shell mounted on a bracket which is rotatable about an axis orthogonal to and offset from the central axis of a ring seat. This plug is connected to the rotatable actuating bracket by means of a threaded pin and nut so that the plug position can be adjusted with respect to the ring seat. Proper adjustment of the pin and nut allows the plug to be mounted in a fixed position on the bracket and enables the plug to be brought into and out of fluid tight sealing engagement with the ring seat without any bending or deformation taking place in the actuating bracket. The obtaining of this desired tight sealing engagement is aided by displacing the bracket axis from the plug center of curvature in the direction of the position occupied by the plug when in its sealing position, and by making the plug position adjustable along the bracket axis.

Abstract: A rotary plug valve having a plug member rotatable in a valve housing member between an open position and a closed position, the plug member carrying a sealing ring, such as an O-ring seal or the like, in a groove provided on its surface between its port openings, the O-ring seal being adapted to encircle one of the ports of the housing member when the plug member is in the closed position. The rotary plug valve is capable of two-way flow therethrough, and this is realized by providing means for equalizing the pressure across the unsupported portion or segment of the O-ring seal when the same is passing across one of the ports of the valve housing. By such an arrangement, the pressure across the O-ring seal may be equalized in certain situations such as when the plug member is rotated towards and approaches a position for closing the valve and when the plug member is rotated towards and approaches the full open position and this prevents clipping or shearing of the O-ring seal.

Abstract: A resilient sealing gasket of patch-like shape having a ring-like sealing lip that defines a continuous pressure chamber open to receive positive fluid flow, is mounted in a shape-conforming positioning on a valve control body that is adapted to be moved, slid or rotated into and out of a fluid flow closing-off position within a valve housing. The sealing portion of the gasket is cross connected along its central area, and the valve housing defines a fluid passageway therein that is serviced by inlet and outlet ports. A second sealing lip is also shown that is sensitive to positive fluid pressure applied in a direction opposite to fluid pressure applied to the first-mentioned sealing lip.

Abstract: A safety valve for use in gaseous service at elevated temperatures, including a casing provided with an annular valve seat and a selectively moveable valve member having mounted thereon a plastic annular sealing ring for seating on the valve seat. The plastic annular sealing ring is preferably formed of Teflon P.F.A. fluorocarbon and is shrunk fit onto a projecting shoulder portion of a metal seal retainer detachably mounted on the valve member, and the valve seat includes a projecting ridge formed by intersecting flat surface portions disposed at an obtuse angle to one another, whereby the plastic annular sealing ring will be engaged by the valve seat ridge when the valve member is seated.