Abstract: A self-sealing and self-positioning replaceable rupture disc cartridge arrangement includes a cartridge receptacle mounted in a pressure relief vent having spaced apart opposite end walls with circumferential positioning grooves on respective internal surfaces thereof and a cartridge assembly having a rupture disc mounted therein for removable placement within the cartridge receptacle. The cartridge assembly includes an annular cartridge body having a cylindrical passage therethrough with a shoulder at one end thereof to retain disc seat rings, having the rupture disc placed therebetween, within the cartridge body. The cartridge includes seal mounting rings which have circumferential seals thereon, which are resiliently retractable into circumferential channels at opposite ends of the cartridge body, and which cooperate with the positioning grooves on the cartridge receptacle walls whereby upon placement of the cartridge within the receptacle, the seal rings snap into the positioning grooves.

Abstract: A water sensitive cutoff valve shuts off upon detecting water to protect a gas leak detector. A transparent case threads into a base and houses a normally open valve mechanism. The valve includes a tapered post with an exit port and a shuttle that is capable of movement along the post to seal or uncover the port. A water-soluble band stretched between a finger mounted on the post and a second finger mounted on the shuttle holds the valve open against the bias of a spring that acts between the shuttle and the post. The presence of water dissolves the band and frees the shuttle to close under the bias of the spring and prevent water from entering and damaging the gas leak indicator. The base has an inlet port for a gas probe, a passage into the case, and an exit port to the gas leak detector. The passage into the case includes a tube extending into the case with an exit in close proximity to the band.

Abstract: The fuel supplied to an injector is maintained at substantially constant pressure by a fuel pressure regulator which balances the fuel pressure with the bias of a coil spring. To establish the desired pressure, a spring housing is deformed to move a spring seat to the position which causes the spring to exert the required bias. The spring seat is connected to the diaphragm by a tie rod which simplifies assembly of the pressure regulator. Slits in the outer portion of the diaphragm allow separation of the diaphragm along an arcuate line while maintaining a continuous peripheral seal about the pressure regulator.

Abstract: A reverse buckling disc having a central domed region, an outer flange and an integral transitional region interconnecting the flange and the domed central region wherein the included angle of the transitional region is greater than the included angle of the domed region, such that the reversing pressure of the disc is determined by the angle of the transitional region rather than by the height of the dome.

Abstract: A gate valve including a valve body having a first bore therethrough for accommodating a reciprocating gate, and further having a second cylindrical bore extending normal to the first bore for fluid flow through the valve. A pair of opposed counterbores are formed in the body adjacent, and on opposite sides of, the first bore and in concentric, axial alignment with the second bore. Annular upstream and downstream seats are seated in the counterbores. A wave spring resting on a shoulder in the body at the bottom of one of the counterbores biases the upstream seat against the gate and maintains sealing when the valve is open.A bonnet is slidably extended through an opening in the valve body, and is forced by fluid pressure into sealing engagement with the body.

Abstract: Rupturable pressure relief apparatus are provided which are less subject to damage and premature failure as a result thereof and which reliably rupture at very low pressure differentials. The apparatus are adapted to be clamped between conventional pipe flanges or annular support members and are basically comprised of a first circular rupturable member formed of solid flexible material and a second circular rupturable member also formed of flexible material positioned adjacent the first rupturable member. The second rupturable member includes a solid annular flange portion and a plurality of arcuate slots circumscribing a substantially circular central portion wth rupture tabs between the arcuate slots. Knife means having a cutting edge forming at least a portion of a circle are positioned adjacent the second rupturable member on the side thereof opposite from the first rupturable member so that when the second rupturable member ruptures, the first rupturable member is severed by the knife means.

Abstract: A gate valve having an inlet and an outlet flow-way with a chamber having a gate inbetween and with counterbores at the end of the flow way adjacent the chamber is disclosed. Each counterbore telescopically receives a seat member. A sealing system for each of the gate seat members which permit certain liquid communication to the valve body cavity is disclosed. Each seal system includes seals on all sides of the gate seat member except the inwardly facing cylindrical walls. Each seal is disposed on an annular groove cut in the outer periphery surface of the end of the gate seat member. The seal on the upstream side of the valve body is located adjacent to the inwardly facing cylindrical wall. The seal between the gate seat and the gate is located near the valve body cavity. The seal on the outwardly facing cylindrical wall is adjacent to the valve body flow-way counterbores.

Abstract: A high pressure shut-off valve consists of a hollow valve body having an open end, a closed end and a cylindrical cavity with a cover therefor. Aligned tubular inlet and outlet portions on opposite sides of the valve body form a continuous straight bore intersecting the cavity at a right angle thereto. A plug valve assembly positioned in the valve body cavity has a supporting mandrel a slidable therein between an extended position abutting the closed end and a retracted position some distance therefrom. The mandrel has an end portion with a laterally extending valve passage and an intermediate portion closing the valve body bore when in the extended position, the valve passage being aligned with the bore when in the retracted position. A sealing sleeve member of elastomeric material surrounds the mandrel intermediate portion and engages the entire circumferential wall of the cavity around the bore to seal against leakage when the valve is closed.

Abstract: A sewer fluid trap is disclosed, consisting of firstly a rigid flat plate permanently secured to a manhole wall surrounding a sewer pipe outlet. This flat plate has a pair of spaced-apart lateral slots. Secondly, an elbow having a lower end submerged in the catch-basin of a manhole and an upper end rigidly secured to a back-plate. The latter is removably inserted into the lateral slots, thereby forming a tight seal between itself and the back-plate. Central holes are formed in both plates and are in registry with the sewer pipe outlet when the trap is installed. A latch locks the two plates together. A ring is fixed to the elbow to lift the same and its back-plate from the manhole without having to descend into the same.

Abstract: A relief valve with a low hysteresis closing curve with a fixed seat and a spring-biased poppet which is guided for longitudinal movement by an axial guide sleeve and aligns with its seat by pivoting about a fixed point through a small angle of rotation.

Abstract: A pressure control valve to control the pressure of a fluid in a fluid system so that it remains constant. This type of valve can be utilized as element of a fuel injection system for internal combustion engines, and has storage means which are independent of the valve member, and actuatable by the pressure of the fluid. The pressure control valve comprises a housing and a support assembly urged toward a valve seat by a control spring. Additionally, a storage spring in the support assembly urges a closing member toward the valve seat. The closing member is slidably received in a bore in the support assembly. The support assembly is connected to a membrane which is tensioned between the housing members. Other variations of this device are also revealed herein.

Abstract: A reverse buckling rupture disk apparatus, adapted to be clamped between inlet and outlet companion bolted flanges, the operation of which is unaffected by the torque applied to the bolts of the companion flanges. The apparatus is comprised of a reverse buckling rupture disk which is welded at its periphery to an annular support ring. The annular support ring is in turn welded to an annular support member. Methods of manufacturing the apparatus are also provided.

Abstract: A ball valve operable between a fully-open position and a closed position for regulating fluid flow includes a valve body machined and arranged with a flow passageway extending completely therethrough and receiving at each end a fluid fitting for coupling to flow lines. Disposed within the interior of the valve body is a ball plug member which is supported below by a stem and needle bearing arrangement and is operable to be turned 90 degrees by a handle, stem and bonnet arrangement. The internal position of the ball plug member is maintained by a pair of ball seats which are centrally disposed within the flow passageway and are held in position by means of adapter cylinders which are in turn held in position by retainer plates. In order to maintain spring-loaded pressure and to provide a sealed interface between the ball seat and the adapter cylinder, spring seal assemblies are disposed within the adapter cylinder and between the ball seat and corresponding retainer plate.

Abstract: A plastic valve cartridge for a plumbing fixture can be installed in and removed from a valve casting without tools. One end of a valve cage has detent means that snaps into a cup of the casting. The cage extends across a cavity in the casting so that its other end fits a cylindrical inlet opening. Valve means carried by the cage include a closure having a stem comprising a pair of leaf spring arms releasably snap-fitted to a non-circular hole in a knob or handle. The cage is locked in position by a sleeve that interferes with the detent means of the cage. Key means allow the sleeve to be removed only when the valve is partly open, thus signalling by spout flow the desirability of shutting off the water supply to the fixture before the cartridge is removed.

Abstract: A hydraulic supply system of a pulsatory press has two pumps (4 and 5) supplying through non-return valves (8 and 9) and through overflow valves (10 and 11), two slide dividers (17 and 19). The divider (17) in the position I directs oil to the working space V.sub.n under the servo-motor piston, whereas the divider (19) directs oil to the rotary divider (20) wherefrom a pulsating stream of oil gets into the working space under the part of the piston of a smaller diameter and into the run-off. The divider (17) in the position II directs oil to the space V.sub.p over the servo-motor piston at a simultaneous connection of the space V.sub.w via a slide valve (24) with the run-off, whereby the value of pressure in the space V.sub.p over the servo-motor piston is limited by means of an overflow valve (15).The conduit supplying oil from the divider (19) to a rotary divider (20) is connected via a cut-off valve (22) and a throttle valve (23) with a conduit supplying oil from the divider (17) to the space V.sub.

Abstract: The invention is an improved pressure compensating flow limiting valve which maintains an optimum performance curve at differing flow rates. The invention is the specific placing of a vent passage in the valve spool immediately downstream of the fluid jet passing across the spool in a metering mode with the vent passage connected to one of the servo chambers which positions the spool. The effect of the exiting fluid jet draws some fluid from the vent passage thereby dropping the pressure level in that servo chamber sufficiently to offset certain dynamic forces on the spool and balance the spring forces on the spool with these forces regardless of the flow rate through the valve.

Abstract: A manually operated gate valve having a fusible element located exterior of the shaft sealing element. Melting of the fusible element permitting outward movement of the shaft and gate elements with all the movable elements being confined to the housing.

Abstract: A control valve for a passageway in which the valve is reciprocated toward and away from its seat by pressure within a pressure dome and pressure exteriorly of the valve housing and in which reciprocation is controlled by a J-slot capable of latching the valve in open position while being run and releasing the valve for reciprocation after being landed in the well together with a frangible disc which may be ruptured to permit flow past the valve member; said valve being used to control flow through a H mandrel in a pumpdown system.

Abstract: A novel seat especially adapted for a butterfly valve is provided which is formed both of metal and "soft" material so as to furnish a "bubble tight" seal in normal operating conditions and a metal-to-metal seal in fire situations. The seat is uniquely constructed and is permanently deformed by the disc or closure member of the valve to form a precise size and configuration corresponding to the size and configuration of the disc.

Abstract: An improved pressure relief valve with an improved device for securing the blowdown ring of the valve without compromising its pressure integrity. These pressure relief valves include a nozzle extending into the interior of the valve and communicating with the pressure vessel and a blowdown ring which is threaded to the nozzle. Atop the nozzle's opening is a disc which is spring biased into engagement with the nozzle to seal same. The device includes an annular collar surrounding at least a portion of the blowdown ring and the nozzle, a first locking member secures the blowdown ring to the collar and a second locking member secures the collar to the nozzle. The device may utilize the wire seal required by many safety codes.