Abstract: A check valve for a fuel pump of a vehicle includes a valve housing adapted to be disposed in an outlet member of the fuel pump and a valve seat formed on the valve housing. The check valve also includes a valve member disposed in the valve housing and having a closed position to engage the valve seat to prevent fuel from flowing through the outlet member and an open position to allow fuel to flow through the outlet member. The valve housing has a vortex abating geometry located near the valve seat to add turbulence to fluid flow past the valve seat when the valve member is in the open position.

Abstract: A repairable pressure relief valve having a valve body that forms an internal fluted surface provides improved field repairability. The internal, fluted surface is adapted to mate with a removal tool. A valve assembly is slidably mounted in the valve housing and slides under excess pressure to vent vapor from a vessel, such as a tank. The valve body has a first seating surface for mating with a second seating surface on the valve assembly when the valve plug is in the closed position. The relief valve has a seal for sealing an interface between the valve plug and the housing and a removable cap mounted proximate to the valve plug for mechanically supporting the seal. The cap can be removed and the seal can be replaced without extensive disassembly of the valve, thereby eliminating the requirement of re-calibration after a repair has been made.

Abstract: A gas purge valve comprising a housing fitted with an inlet port being in flow communication with a liquid outlet port, and at least one gas outlet member, a gas flow barrier associated with the liquid outlet port, a float member displaceable within the housing between a first position adjacent the inlet port and a second position adjacent the gas outlet The at least one gas outlet is fitted with an inlet prohibiting valve, and is sealingly engageable by a flexible sealing member articulated to the float member. Buoyant displacement of the float member into the second position entails sealing of the at least one gas outlet by the flexible sealing member.

Abstract: A suction valve including a valve seat and a piston movably joined to the valve seat. The piston has a head for engaging the top surface of the valve seat and a stem extending downwardly from the head through the valve seat. A valve guide is positioned adjacent the bottom surface of the valve seat and slidably receives the stem. A valve keeper is fitted upon the stem such that the valve guide is disposed between the valve seat and the valve keeper. A keeper pin is slidably positioned within a transverse aperture in the stem and abuts the bottom of the valve keeper. A compressed spring is positioned between, and exerts opposing forces upon, the valve guide and the valve keeper so as to normally retain the head of the piston in engagement with the top surface of the valve seat.

Abstract: An air poppet valve for use in molding or drawing deep draw thin walled plastic or metal parts. The air poppet valve includes a poppet, a sleeve, a spring and a pin. Said poppet includes a pin clearance and a poppet sealing surface. Said sleeve includes a spring retaining ledge, an outer diameter, a recess portion, a plurality of reliefs, a collar, a plurality of air passage channels, a sleeve sealing surface, and a poppet clearance. Said pin is inserted through the pin clearance of the poppet, and the spring is contained between the pin and the spring retaining ledge of the sleeve. The air poppet valve having said plurality of air passage channels permit use of an air supply line from the underneath of the poppet, or the side of the air poppet valve.

Abstract: A pressure relief valve having a modular design that allows the release pressure of the valve to be altered during assembly is provided by the present invention. The valve includes a serrated valve tube that fits inside of a valve body. A spring retainer ring fits on an outside diameter of the serrated valve tube such that it is held in position by interacting with the serrations. The release pressure of the valve is altered by changing the position of the spring retainer ring on the serrations. In addition, a variety of different spring types and configurations can be utilized in conjunction with the spring retainer ring position to select one of a large number of different release pressures for the valve during assembly.

Abstract: A suction valve including a valve seat and a piston movably joined to the valve seat. The piston has a head for engaging the top surface of the valve seat and a stem extending downwardly from the head through the valve seat. A valve guide is positioned adjacent the bottom surface of the valve seat and slidably receives the stem. A valve keeper is fitted upon the stem such that the valve guide is disposed between the valve seat and the valve keeper. A keeper pin is slidably positioned within a transverse aperture in the stem and abuts the bottom of the valve keeper. A compressed spring is positioned between, and exerts opposing forces upon, the valve guide and the valve keeper so as to normally retain the head of the piston in engagement with the top surface of the valve seat.

Abstract: A repairable pressure relief valve having a valve body that forms an internal fluted surface provides improved field repairability. The internal, fluted surface is adapted to mate with a removal tool. A valve assembly is slidably mounted in the valve housing and slides under excess pressure to vent vapor from a vessel, such as a tank. The valve body has a first seating surface for mating with a second seating surface on the valve assembly when the valve plug is in the closed position. The relief valve has a seal for sealing an interface between the valve plug and the housing and a removable cap mounted proximate to the valve plug for mechanically supporting the seal. The cap can be removed and the seal can be replaced without extensive disassembly of the valve, thereby eliminating the requirement of re-calibration after a repair has been made.

Abstract: A service valve for a CO2 refrigerant based air conditioning system in a vehicle. The service valve includes a dynamic seal that is opened and closed during servicing of the air conditioning system. The dynamic seal provides for good overall sealing as well as good permeation resistance.

Abstract: A check valve comprising a casing having a flange extending circumferentially around the inner periphery of the body. The flange is constructed by first drilling from a first direction at a diameter less than the predetermined diameter and then drilling from an opposite direction at the predetermined diameter. The flange defines a valve aperture for receiving a poppet valve. The poppet valve includes a stem including a plurality of legs each having an outer peripheral surface facing the valve aperture. The outer peripheral surface of the valve legs have rounded or recessed edges such that only a center portion of the outer peripheral surface of the legs can come into contact with the inner surface defining the valve aperture.

Abstract: A check valve for a fuel pump of a vehicle includes a valve housing adapted to be disposed in an outlet member of the fuel pump and a valve seat formed on the valve housing. The check valve also includes a valve member disposed in the valve housing and having a closed position to engage the valve seat to prevent fuel from flowing through the outlet member and an open position to allow fuel to flow through the outlet member. The valve member has at least one outlet port a predetermined dwell distance from the valve seat when the valve member is in the closed position and allows fluid flow past the valve seat when the valve member is in the open position.

Abstract: A vaccum-breaking valve comprising: a tubular body (10) mounted through one of the walls (P) of the cabinet (G) and having inner (11) and outer (12) ends, a valve seat (15) defining a fluid communication between the inside and the outside of cabinet (G); and a seal constantly biased towards a closed position, blocking said fluid communication and dispalceable towards an open valve position. The seal comprises a slide (20), which is axially and slidingly mounted through the valve seat (15) and has a surrounding sealing ring (25), which is seated against the valve seat (15) when the slide (20) is displaced to the closed seal position, the slide (20) being provided with at least one air passage (24) interconnecting the upstream and downstream sides of the valve seat (15) when the slide (20) is in the open seal position.

Abstract: A check valve for a fuel pump of a vehicle includes a valve housing adapted to be disposed in an outlet member of the fuel pump. The valve housing has a valve seat formed thereon. The check valve also includes a valve member adapted to be disposed in the outlet member and cooperating with said valve seat. The check valve further includes a nonlinear spring adapted to be disposed in the outlet member and cooperating with the valve member to move the valve member to a closed position to engage the valve seat to prevent fuel from flowing through the outlet member and an open position spaced from the valve seat to allow fuel to flow through the outlet member.

Abstract: A check valve comprising a casing having a flange extending circumferentially around the inner periphery of the body. The flange is constructed by first drilling from a first direction at a diameter less than the predetermined diameter and then drilling from an opposite direction at the predetermined diameter. The flange defines a valve aperture for receiving a poppet valve. The poppet valve includes a stem including a plurality of legs each having an outer peripheral surface facing the valve aperture. The outer peripheral surface of the valve legs have rounded or recessed edges such that only a center portion of the outer peripheral surface of the legs can come into contact with the inner surface defining the valve aperture.

Abstract: A check valve for a fuel pump of a vehicle includes a valve housing adapted to be disposed in an outlet member of the fuel pump and a valve seat formed on the valve housing. The check valve also includes a valve member disposed in the valve housing and having a closed position to operatively engage the valve seat to prevent fuel from flowing through the outlet member and an open position to allow fuel to flow through the outlet member. The valve member also has a single outlet port to allow flow from the valve member when the valve member is in the open position.

Abstract: The flexible hose assembly 10 interconnects a portable tank and another tank for transmitting hazardous fluids. A back check housing 34 contains a valve member 56 and a seating surface 58 for closing off flow through the back check housing. A flexible hose 16 extends downstream from the back check housing, and a flexible sensing line 26 extends within the flexible hose downstream from the back check housing for transmitting fluid pressure to a piston 36. The piston 36 is axially movable between a locked and unlocked position, and when in a locked position maintains the valve member in the open flow position and when in the unlocked position allows the valve member to move to the closed position. A biasing member is provided for biasing at least one of the piston and valve members to the unlocked position.

Abstract: A poppet valve is designed in a manner that results in relatively low failure rates and/or operates with relatively little or no degradation in performance. The poppet valve may include one or more features, each independently or in combination, contributing to such high service life and/or performance. The poppet valve includes a body, a poppet, and a spring. The poppet valve may also include an interface between the poppet and the spring to permit relative rotation between the spring and the poppet. The poppet valve may also include a limit stop to prevent over-stressing the spring. The body may include one or more tapered walls to reduce interference with the spring. The spring may also be tapered. The poppet may include one or more tapered elements.

Abstract: Within a check valve, a spring urges a poppet into the closed position. If the fluid flow through the valve attempts to reverse, the poppet will seal against the valve seat by a combination of spring resistance and fluid pressure, thereby preventing all or a significant portion of fluid flow back through the valve body. The poppet is retained in the valve body by a retainer or other suitable part or combination of parts that can be removed for service of the check valve assembly.

Abstract: Disclosed is a pressure relief valve for attachment to a closed vessel having an opening to vent gas and liquids from the housing should the internal housing pressure rise to unacceptable levels. The pressure relief valve includes a single gasket that seals between a valve disk and a collar disposed about the opening. The gasket is fixed to the collar by a single retaining ring and effects seals with the disk valve in two planes, one seal is in a plane generally parallel to the plane of the opening and a second seal is in a plane generally normal to the plane of the opening. Moreover, the second seal remains in tact for a short time after the first seal is broken to permit the rapid separation of the disk valve from the gasket to vent gas and liquids from the housing.

Abstract: A fluid flow control valve is disclosed. This valve includes a housing which defines a central passageway having fluid inlet and fluid outlet openings. A pressure responsive element is disposed within the passageway for selectively opening and closing the inlet opening to fluid flow in response to fluid pressure exerted thereon at the inlet opening. A mechanism is provided within the passageway for exerting a bias force against the pressure responsive element which is sufficient to close the inlet opening to fluid flow absent a pre-established level of fluid pressure exerted on the pressure responsive element. A fluid filter element is also disposed within the passageway; and a retainer device is positioned for removably securing the filter element within the passageway.

Abstract: A check valve attached to an inner wall of a main body of a fuel tank ensures a sufficient seal of the main body from outside, without increasing the required number of parts. The check valve communicates with a fuel conduit of a fuel inlet pipe and functions to prevent liquid fuel and fuel vapor in the main body from flowing through the fuel inlet pipe and being released to the outside. The check valve is opened by a flow of fuel in the fuel inlet pipe and allows the flow of fuel to be introduced into the main body. The check valve includes a casing with a fuel outlet, a valve disc, and a fixation plate. The valve disc is movable between an open position and a closed position to open and close the fuel outlet of the casing. The fixation plate has one end inserted in an end of the casing and the other end welded to the main body. This arrangement enables the main body to be securely sealed from the outside.

Abstract: Disclosed is a pressure relief valve for attachment to a closed vessel having an opening to vent gas and liquids from the housing should the internal housing pressure rise to unacceptable levels. The pressure relief valve includes a single gasket that seals between a valve disk and a collar disposed about the opening. The gasket is fixed to the collar by a single retaining ring and effects seals with the disk valve in two planes, one seal is in a plane generally parallel to the plane of the opening and a second seal is in a plane generally normal to the plane of the opening. Moreover, the second seal remains in tact for a short time after the first seal is broken to permit the rapid separation of the disk valve from the gasket to vent gas and liquids from the housing.

Abstract: Valves, particularly service connection valves for use with a refrigeration system and the like, to permit charging, evacuation and/or testing of the system, are disclosed. In one embodiment, the valve includes a valve seat, a valve body detachably connected to the valve seat, and a valve core detachably secured within the valve body. The valve body and valve core are removable together as a single unit from the valve seat. In another embodiment, the valve includes a valve seat, a valve body detachably connected to the valve seat, and a cap that are designed so that the action of unscrewing the cap from the valve body will never cause the valve body to be unscrewed from the valve seat. Therefore, unscrewing the cap from the valve body will never loosen the connection between the valve body and the valve seat, thereby preventing leakage between the valve body and valve seat.

Abstract: An anti-geyser shut-off valve assembly for a water sprinkler irrigation system. It has a valve housing, a valve member, a coil spring, and a push nut that would be installed on the elongated shaft member of the valve housing for restricting the distance that the valve member may be biased away from a valve housing. When a sprinkler housing is mounted above the shut-off valve assembly and is operating properly, there is minimal obstruction to the water flow passing therethrough. If the sprinkler head or riser is broken off, the uncontrolled geyser of water will be automatically shut off and a thin stream of water would be sprayed upwardly to function as a flag identifying that the sprinkler head requires repair.

Abstract: A fuel filter comprises a filter head having an inlet and an outlet. A filter element is connectable to a nipple portion in the filter head. An actuating projection supported by the element is engageable with a valve element in the nipple portion to open flow through the nipple portion when the filter element is attached to the filter head. The filter head includes an annular threaded peripheral flange, and the element includes a corresponding annular threaded peripheral flange which together cooperate to secure the element to the head. A manual priming pump in the filter head includes a pair of check valves to control the flow of fluid through the head when priming the filter. A heater assembly includes a heater pan which encloses the heater elements and also includes the nipple portion, formed unitary therewith.

Abstract: A check valve attached to an inner wall of a main body of a fuel tank ensures a sufficient seal of the main body from outside, without increasing the required number of parts. The check valve communicates with a fuel conduit of a fuel inlet pipe and functions to prevent liquid fuel and fuel vapor in the main body from flowing through the fuel inlet pipe and being released to the outside. The check valve is opened by a flow of fuel in the fuel inlet pipe and allows the flow of fuel to be introduced into the main body. The check valve includes a casing with a fuel outlet, a valve disc, and a fixation plate. The valve disc is movable between an open position and a closed position to open and close the fuel outlet of the casing. The fixation plate has one end inserted in an end of the casing and the other end welded to the main body. This arrangement enables the main body to be securely sealed from the outside.

Abstract: A spray head for fixing on a control rod of a valve or a pump. The spray head includes a body and a shutter disposed in a housing of the body. The housing is suitable for dispensing substance under pressure. At rest the shutter is in a closed position in which its frustoconical head portion is seated a frustoconical bearing surface of the body. The shutter moves away from the bearing surface under the pressure of the substance contained in the housing when the substance is being dispensed to form an annular dispenser orifice enabling the substance to be dispensed in the form of a hollow conical spray, at least in the vicinity of the spray head. The shutter moves away from the bearing surface against a resilient return action urging it back towards its closed position and returns to the closed position when the pressure of the substance diminishes.

Abstract: The invention relates to a radial piston pump for high-pressure fuel delivery in fuel injection systems of internal combustion engines. The pump includes a drive shaft that is supported in a pump housing and is embodied eccentrically or has a number of cam-like projections in the circumference direction, with a number of pistons that are disposed radially with regard to the drive shaft, each piston in a respective cylinder chamber. Each piston can be set into a reciprocating motion in the cylinder chamber upon rotation of the drive shaft. The pump includes an intake side and a high-pressure side check valve, and a component which has a through opening that constitutes the cylinder chamber, into whose radially outer end, a sealing element is inserted. The intake side check valve is integrated into the sealing element.

Abstract: The filter cartridge assembly has a valve body having an interior flow passage, a filter across the interior flow passage, and a check valve assembly in the valve body. The filter removes particulates as small as 0.003 microns. A check valve element adjacent to a valve seat in the interior flow passage has a check valve poppet and a stem. The check valve poppet has a relatively narrow neck, and the check valve poppet is tapered inwardly from the outlet end toward the neck at an oblique angle relative to the longitudinal axis of the valve body that is substantially equal to the oblique angle of the annular valve seat.

Abstract: An airless paint sprayer has a pressure dampener in the paint supply line to the pump for providing consistent atomization at the spray gun orifice. During peak pressure times within the system and when an inlet check valve is open, paint within the pressure dampener is added to the paint in the supply line to overcome the tendency for the paint to cavitate and delivery an uneven spray pattern.

Abstract: A pressure-limiting valve for use in a gas system for manual ventilation of patients, has a valve seat with an opening, a valve plate and a force-generating element, the force-generating element being arranged to press the valve plate against the valve seat in order to close the opening. In order to reduce the risk of annoying noise from the valve, the valve is devised so the valve plate is asymmetrically shaped, so as to cause a gas flowing through the opening in the valve seat, when the valve is in the open position, to apply an asymmetrical force against the valve plate.

Abstract: A valved fitting is provided which includes a body having a first end and a second end spaced from the first end, with a fluid passage extending through the body between the first and second ends. A valve seat is defined on the body within the fluid passage, and a valve assembly is removably disposed within the fluid passage for controlling flow through the fluid passage. The valve assembly includes a valve head that is engageable with the valve seat in sealable relation therewith. A higher flow area, and thus a higher flow rate, are achieved with the fitting of the invention as compared to conventional fittings which utilize a single-piece body with a Schrader valve, because the valve seat is defined on the body, and the valve head is engageable with the valve seat. Further, the valve assembly is removable, thereby allowing the valve assembly to be replaced when needed. The valved fitting of the invention is particularly useful on a service valve block for an air conditioning system.

Abstract: A fuel injection system (10) for a multiple-cylinder engine includes a single solenoid-operated fuel metering valve (12) connected through fuel lines (50) to a plurality of fuel injection nozzles (52). The fuel metering valve (12) has a solenoid-operated movable valve member (14) that opens and closes a single discharge opening (26) having a first metering orifice (58). Each injection nozzle (52) has an equally calibrated second metering orifice (90) that serves to distribute the fuel metered by the first orifice evenly over all of the fuel injection nozzles. Preferred forms of the fuel injection nozzle is also disclosed.

Abstract: A bypass fuel pressure regulator disposed downstream of and in communication with a fuel pump outlet to bypass at least a portion of the outlet fuel from the fuel pump corresponding to the engine's fuel demand. The regulator has a bypass passage with an inlet in communication with the fuel pump outlet and an outlet in communication with the fuel tank. A valve assembly is received in and controls the flow of fuel through the bypass passage. The valve assembly has a disc carried on one end of a stem which has an enlarged valve head adjacent its other end which is movable to open and close an outlet opening of the regulator. The disc is disposed generally transverse to the axis of the bypass passage and upstream of the valve head. The disc has at least one and preferably several openings through which fuel flows into the bypass passage through the disc. A spring is received between the regulator body and the disc to yieldably bias the valve head onto a valve seat to close the regulator outlet.

Abstract: A pressure relief valve for use with inflatable devices such as life rafts and escape slides which provide significant improvement in exhaust flows while maintaining a highly desirable compact configuration, particularly as to the height dimension. The pressure relief valve including a poppet having a protected skirt thereon which is biased within a valve body to maintain pressure within the inflatable device unless a preselected maximum pressure is exceeded whereby the poppet releases and opens a fluid passage to exhaust ports. The protected skirt providing a more efficient and thus improved "pop action" which results in improved low pressure PRV performance.

Abstract: A device that produces toroidal bubbles of gaseous fluid when operated in immersed relation to a body of liquid fluid. A first embodiment is operated by a person who blows into a first end of the device with a short burst of air, and a second embodiment is operated by a pneumatic pump that delivers a short burst of air to the first end. A normally closed valve such as a poppet valve is positioned on a second end of the device. The valve opens and closes very rapidly in response to the burst of air. Air escaping around the peripheral border of the valve creates a toroidal bubble that expands in volume as it approaches the surface of the liquid fluid; the effect is visually pleasing. The valve of the device may also be held in the mouth, eliminating the conduit. In additional embodiments, the source of gaseous fluid is any pneumatically-charged device.

Abstract: A pump includes a coaxially integrated pump bypass/relief valve element of high density polymer material seats against a hard metallic sleeve that is pressed into a first counterbore around the bypass flow channel with an interference fit. That axial end of the sleeve bearing the valve seat face projects, for a substantial proportion of the sleeve length, beyond the first counterbore shoulder into a second counterbore space to provide an annular space around the outside diameter surface of the sleeve to free the seat face end of the sleeve from direct structural restraint.

Abstract: The invention relates to a piston, through which a fluid can flow, for a piston pump, which piston has a longitudinal bore into which a spring-loaded inlet valve body is inserted. In order to be able to bring a helical compression spring, which loads the inlet valve body, to bear against an annular shoulder in the longitudinal bore and to be able to check and if necessary improve its seating after installation, the invention proposes to produce the inlet valve body in two parts comprising the inlet valve disk and the inlet valve stem and to join these two parts to one another after the helical compression spring has been correctly inserted into the piston. The inlet valve disk can for example be joined to the inlet valve stem by ultrasonic welding, thermoplastic riveting or screwing.

Abstract: A valve device installed within the interior of a water receiving tank. A cylindrically shaped housing has a pair of openings at either end and is substantially contained within the tank. A valve rod is movably mounted within the housing. A cap is attached to one end of the valve rod and engages an innermost end of the housing to form a water tight seal. A spring is mounted within the housing to bias the valve rod and cap to a closed position. A flange is secured to the other end of the housing and is mounted to the external surface of the tank. The flange is adapted to connect to a conventional water conduit to facilitate communication of water from a hydrant to the tank. When water, under sufficient pressure from a water source, enters the valve device, the cap and valve rod are urged inward opening the valve to allow water to fill the tank. When the pressure of the water source falls below a certain level, the valve device closes providing a water tight seal.

Abstract: An airless paint sprayer includes an inlet check valve assembly having a dual spring configuration which allows for increased travel distance of the inlet check valve thereby increasing the fluid flow through the valve without diminishing response time of the valve or the priming operations of the system. A dampener also contributes to lessening the cavitation and loss of pressure in the paint sprayer and comprises a generally T-shaped fitting in which one leg of the T-shaped fitting is capped and includes a trapped volume of air to dampen acceleration/deceleration forces and acceleration spikes being transmitted from the pump to the fluid being pumped through the fitting.

Abstract: A vacuum breaker valve assembly is provided including a housing mountable to a transport tank. The housing has a wall defining a passageway through the housing and there is a valve member movable within the housing. Structure is provided for permitting the valve member to move in response to variations in tank pressure between (1) and open state when atmospheric air external of the tank is allowed to travel through the passageway and into the tank once a predetermined vacuum pressure condition is reached, and (2) a closed state wherein the passageway is sealed to prevent atmospheric air travel into the tank when the predetermined vacuum pressure condition in the tank has not been reached. A housing lid is mounted to the housing and includes a vent hole for allowing atmospheric air to enter the housing passageway. A bottom wall integral with the housing wall includes a vent hole therethrough communicating with the interior of the tank.

Abstract: This invention is directed to a closing member of an inlet valve of a pressure-medium-traversed piston of a reciprocating piston pump. The closing member is disposed as fully as possible in the piston to minimize the dead air space. The piston has a longitudinal bore in which a stem engages the closing member, which stem emanates from a valve disk. The stem is embraced by an at least approximately frustoconical helical compression spring acting as a closing spring. This is held, with an end segment of smaller diameter, non-twistably against the stem. A shoulder of the longitudinal bore is located on the valve seat side and exhibits at least one cross-sectional alteration for the screw-like action upon the end segment of larger diameter of the closing spring. The closing spring is thus able to be sunk into the longitudinal bore and biased in place. The reciprocating piston pump can be used, for example, for slip-regulated braking systems of motor vehicles.

Abstract: Disclosed herein is a nozzle assembly comprising a housing including a central bore having, at one end thereof, a valve seat, an elongated needle member having, at one end thereof, a valve portion engageable with the valve seat, and having, at the other end thereof, an end portion, a retainer member having therein a bore receiving the end portion of the needle, and being fixed to the end portion of the needle, and a spring acting between the housing and the retainer member to bias the valve portion into engagement with the valve seat, and a method of assembly therefor comprising the steps of locating the needle member in the bore in the housing with the valve portion in engagement with the valve seat and with the end portion extending from the housing, locating the spring in surrounding relation to the end portion of the needle member and in operative engagement with the housing, locating the retainer member with the end portion of the needle member passing through the bore in the retainer member, spacing the

Abstract: A valve assembly including a valve housing adapted to be fixed in the bore of a member supplying fuel under pressure, the valve housing including a bore which extends along an axis, which is adapted to communicate with the bore of the member and which has an end portion defining a valve seat, a valve member moveable in the axial bore in the valve housing between a closed position in which the valve member is engaged with the valve seat and an open position in which the valve member is spaced from the valve seat, the valve member including an inner end, a retainer rigidly fixed to the inner end of the valve member, and a spring bearing against the valve housing and against the retainer so as to bias the valve member into the closed position when the fuel pressure in the valve assembly is below a predetermined pressure.

Abstract: A multi-function valve for installation in a riser of a sprinkler system provides two valve functions. One function is to stop flow automatically when breakage of a sprinkler head causes the flow rate to exceed a predetermined threshold. The second function is to prevent back flow and reduce the risk of the "hammer effect" causing damage to the sprinkler system.

Abstract: A valve device for restricting fluid flow has a hollowed piston member having a closed piston end wall and an open piston seat end. The piston end wall is integral with a second piston wall which extends to the piston seat open end which, in turn, opens into a chamber defined by the piston end wall and second wall. The piston second wall is positioned in slidable contact with a housing interior wall surface and has at least one aperture positioned therethrough for a fluid to flow in or out of the piston from the chamber so that upon the piston being reciprocated in the housing, when the piston seat end is seated in a seat integral with the housing, the at least one second wall aperture is confined by the housing interior wall surface to close the valve to fluid flow and so that when the piston is at a position displaced away from the seat, the at least one aperture is unconfined by the housing so that the valve is open to flow of fluid.

Abstract: A secondary pressure relief valve assembly is coupled to a cryopump relief valve for reducing the gas load on the cryopump. The pressure relief valve assembly comprises a main housing mounted to a crypoump exhaust conduit enclosing that portion of the cryopump valve typically exposed to the external environment. A second relief valve is mounted to the main housing and operates in series with the cryopump valve to exhaust pressurized gases from the cryopump during regeneration. A pump is coupled to a port on the main housing and maintains a pressure within the main housing which is less than the pressure of the external environment. As such, the pressure differential across the cyropump valve is reduced. Since the leakage and permeation gas loads are linearly related to the pressure differential, they are correspondingly reduced.

Abstract: A mixing valve according to the invention allows fluids such as hot and cold water to flow through a pair of inlet ports, mix together and then exit through an outlet port. A check valve in each inlet allows the incoming fluid to flow in a forward direction, but prevents any reverse or crossover flow. An adjustable stop, positioned intermediate the valves, regulates the extent to which each valve can open to provide a desired mixing ratio of fluids, and can also be used to close one of the check valves. An actuator connected to the adjustable stop permits manual control of the mixing ratio.

Abstract: A check valve includes an outer poppet therein having a central opening therein where the outer poppet is mounted on the internal lip within the body of a valve. The outer poppet is translatable relative to the inner lip and body and an inner poppet is mounted within the central opening of the outer poppet where the inner poppet is also translatable relative to the outer poppet and inner lip. A means for limiting the translation of the outer poppet relative to the internal lip and a means for limiting translation of the inner poppet relative to the internal lip allow the outer and inner poppet to extend between an open position and retracted position to allow improved flow area through the valve.

Abstract: A single seal fluid control valve (100) is provided that has a guide member (12) secured within a chamber (34) of a body member (2) such that an outer portion of a sealing member (18) secured to an annular securement surface (21) of guide member (12) is compressed against an annular sealing surface (17) of a shoulder (26) extending from body member (2) into chamber (34) to prevent fluid leakage therebetween. An inner exposed portion of sealing member (18) is engagable by an enlarged head (16) of a pin member (31) that is guided by and reciprocally movable relative guide member (12) and operative to compress the exposed portion of sealing member (18) sufficiently to prevent fluid leakage therebetween when urged thereagainst by a biasing spring (20) when fluid pressure at an inlet (6) of body member (2) is less than required to overcome the biasing force.