Abstract: A pneumatic check valve includes valve connections having a common axis of symmetry and a valve body at least partially guided in a droplet-shaped member disposed between the two connections to substantially eliminate flow and restriction losses occurring during operation.

Abstract: A pressure responsive valve assembly for use in a decanting apparatus for a wastewater treatment reactor. The valve assembly includes a cylindrical valve plate, a valve member support structure, a valve spring, and a valve member comprising a valve stem and a valve head. A discharge passageway extending through the valve plate has a frusto-conical valve seat located therein. The valve head also has a frusto-conical design having an angle of divergence smaller than that of the valve seat so that when the valve head is biased against the valve seat by the valve spring, the valve seat sealingly engages a peripheral edge of the valve seat. The valve member support structure maintains the valve member in proper alignment with the valve seat and in engaging relationship with the valve spring.

Abstract: A gas flow control valve for engine crankcase emissions includes an enclosure and a hollow valve element which is supported on a rod to permit sliding movements in response to a balance of forces produced by gas pressure and a closing spring located within the hollow control valve element. Vanes straighten gas flow to prevent oscillation and rotation of the valve element.

Abstract: An air pump having a diaphragm moved with a solenoid operates to supply air under pressure to air mattresses of an air bed. A hand control having a pair of valves functions to control the operation of the air pump to supply air to the air mattresses and vent air from the air mattresses.

Abstract: A duty-cycle type electromagnetic injector assembly has a valve and cooperating valve seat with the valve being positioned away from or against the valve seat depending upon whether an associated electrical coil is energized; a housing generally contains the valve and valve seat; a guide closely confines the valve permitting the valve to be freely moved toward and away from the valve seat while constraining movement of the valve in other directions; and a fluid pressure regulator forming a portion of the injector assembly establishes both the static rate and dynamic rate of liquid flow metered by the injector assembly.

Abstract: A pulse-irrigation system comprises a pressurized water supply line supplying water in a continuous, non-interrupted manner, a water irrigation device, and a pulsating device for converting the pressurized water of the line to the pulsating output when supplied to the irrigation device. The pulsator device comprises an inlet orifice of restricted cross-sectional area, an outlet orifice of substantially larger cross-sectional area, and a valve which is normally closed, automatically opens at a predetermined opening pressure lower than that of the inlet pressure to connect its inlet to its outlet, and automatically closes at a predetermined closing pressure lower than its opening pressure. The pulsator device further includes a reservoir for the fluid and located between the inlet orifice and the valve such that when the valve is closed the reservoir fills up and at the same time builds up pressure until the valve opens to discharge the fluid within the reservoir.

Abstract: A relief valve comprises a stationary valve seat and a poppet member which has a valve surface sealingly engageable with the stationary valve seat. The poppet member has an axially extending wall in the vicinity of the valve surface. When the poppet valve is displaced from the stationary valve seat, the low pressure which is exerted against the poppet valve in the vicinity of the poppet valve surface resulting from fluid flowing between the stationary valve seat and the poppet valve surface is generally substantially exerted in a radial direction against the axial wall to thereby prevent reseating of the poppet member at the initial opening conditions for the relief valve.

Abstract: A pressure activated valve apparatus for axial in-line positioning within sanitary systems, such as steam lines for food processing, in which the entire apparatus, including the spring biasing and valve elements are positioned within the flowing media. The spring biasing element is protected from contact with the flowing media, through the use of a sealed fluid-dynamic cover so as to allow the passing media to flow over it with a minimum amount of resistance. The entire apparatus is connected to an incoming and an outgoing conduit so as to enable easy removal for replacement or maintenance purposes, with a minimum amount of cost and effort. A fluid-dynamic cover is fitted over portions of the valve assembly to isolate same from the fluid itself, while being removable to enable facilitated replacement or maintenance of the internal valve actuation parts.

Abstract: A sterilization container is provided with relatively large top and bottom apertures to allow hot steam to rapidly pervade the interior of the container through the top while flushing cool air out the bottom. The apertures are provided with pressure actuated valves with large cross sections to minimize impedance to gas flow when the valves are open. The pressure-sensitive elements of the valves are set such that the valves close to seal the apertures when the external pressure is at atmospheric, and rapidly open fully when the pressure begins to rise in the autoclave as steam is admitted at the start of a sterilization cycle. When the external pressure is returned to atmospheric at the end of the cycle, the pressure-actuated valves close to provide a sealed container for removal from the autoclave.

Abstract: For use in a system comprising a source of pressurized fluid and a plurality of lines extending to a plurality of gas springs, a gas spring comprising a cylindrical body with a bore, a piston rod positioned in the body and having an end projecting beyond one end of the body, a base closing the other end of the body, the cylindrical body and piston rod interengaging one another to limit relative outward movement of the piston rod with respect to the body. The gas spring includes a radial inlet through the wall of the cylindrical body into the base. A one-way valve is positioned in the base within the inlet and an axial inlet pressure passage extends from the outlet end of the valve to the interior of the cylinder. A radial bore is provided in the base and communicates at one end through an axial pressure relief passage to the interior of the cylinder.

Abstract: A pressure relief valve for a hot gas generator is constructed as a valve arrangement which can be subjected to high temperature shocks and abrasion causing gaseous streams. The valve arrangement is constructed so as to have a prolonged operative life despite such operative demands, whereby simultaneously the predetermined pressure resistance for this valve arrangement is precisely maintained. For this purpose the valve arrangement includes a piston of substantially longitudinal cylindrical shape which has hemispherically shaped ends. A coil spring is operatively maintained behind the piston between a pair of end pieces which bias the piston towards a combustion chamber. The valve arrangement includes a valve body in which the piston is slidably moved. The valve body is made of a high temperature molybdenum alloy, whereas the piston, the seat and the end pieces for the coil spring 16 are made of a material having poor heat conduction characteristics, preferably silicon nitride.

Abstract: The pressure relief valve is debris resistant, self-cleaning, and self-actuating in a cryopump. It includes an o-ring carried by a valve member within a valve cylinder. In opening, the valve member moves away from an end port to open vent ports in the side of the valve cylinder while withdrawing the o-ring to a debris free and protected region of the valve. As the valve member is moved into the closed position in response to an atmospherical pressure differential, a wiper ring cleans debris from the inner surface of the valve cylinder. A taper is provided on the inner surface of the cylinder to release compression on the vacuum sealing o-ring upon opening and to compress the o-ring as the valve member moves to the closed position. The wiper ring is expansible in order to provide a wiping action along the entire taper and prevent debris from reaching the o-ring. The end of the valve cylinder opposite to the end port serves as a shock absorber as the valve is opened.

Abstract: A vacuum valve-sensor device mounted on a vacuum source and maintaining the vacuum generated by the vacuum source to a required level. It includes a one-way valve which allows gas to flow towards the vacuum source but not away therefrom, and a pressure sensor on the side of the one-way valve remote from the vacuum source. The one-way valve includes a valve seat through which flow of gas is directed and a valve element biased toward seating on the valve seat from the side of the vacuum source. The pressure sensor may be located on the side of the valve seat remote from the valve element thereof, and may include a V-ring seal member fitted on the valve element.

Abstract: A quick-action on/off valve comprises a housing including a partition having an interconnecting passageway between the two chambers on opposite sides of the partition. One chamber includes a fixed piston and a movable cylinder, the cylinder including a resilient disc between its closed end and the port leading from the first chamber, and a spring urging the cylinder in the direction tending to close the latter port. Spacing means are provided between the partition and the open end of the cylinder for continuously maintaining communication between the first chamber and the interconnecting passageway. The difference in the cross-sectional areas of the first port and of the cylinder result in a smaller area of the cylinder being effective to open the valve when the valve is closed, but a larger area of the cylinder being effective to close the valve when the valve is open, thereby providing a quick-action opening and closing of the valve.

Abstract: The valve for supplying a flow medium to a flow medium pipe which alternatingly carries different flow media, in particular to the flow medium pipe of a converter for treating the contents of a converter with various gaseous flow media, exhibits a chamber (20) between the flow medium inlet (7) and the flow medium outlet (10), which chamber may be closed on the side facing the flow medium inlet (7) by a piston (11) and on the side facing the flow medium outlet (10) by a disk (12). The piston (11), on the side turned away from the chamber (20), and the chamber (20) are optionally connectable via separate flow medium pipes (27 and 28, respectively) with the flow medium inlet (7) and the free atmosphere, respectively, to close the chamber (20) by the piston (11) and evacuate the chamber, or with the free atmosphere and the flow medium inlet (7), respectively, to open the chamber (20) by the piston (11).

Abstract: A pressure relief valve includes a housing defining an internal valve chamber. A valve seat is positioned within the chamber, and a valve pallet is reciprocally mounted within the chamber to engage the seat in a valve closed mode. A spring is mounted within the housing to bias the valve pallet into engagement with the valve seat. A spring retainer is threaded through an aperture in the housing and extends into the valve chamber. The spring is located within the retainer. A desired set pressure to be imposed upon the valve pallet is provided by threading the retainer relative to the housing thereby compressing the spring. To lock the retainer relative to the housing, an annular lock member is threaded onto the outside of the retainer. Once the desired set pressure is attained, the lock member is threaded on the retainer until it abuts the housing. The lock member includes first and second ends spaced apart to define a gap.

Abstract: A bypass valve assembly is disclosed for use with a fluid flow meter of the type having a housing, an inlet, an outlet, a fluid passage which fluidly connects the inlet to the outlet and a flow rate responsive member within the fluid passage. The bypass valve assembly comprises a tubular body open at one end in which is secured to the flow meter housing so that the open end of the tube registers with the flow meter inlet. A valve member is contained within the tube and is urged to a closed position by a helical spring. In its closed position, the valve member directs all of the influent to the flow meter through the passage. When the fluid flow rate into the flow meter exceeds a predetermined amount, the valve member moves to an open position against the force of the helical spring thus bypassing the influent directly to the flow meter outlet.

Abstract: The present invention provides a pressure relief valve having a broad range of variable relief pressures. The valve has an inlet passage, an outlet passage, a valve seat interposed between said passages, a valving member mounted for movement into and out of sealing engagement with the valve seat, a valve stem assembly operably connected to said valving member, and two or more resilient compression springs of preferably variable length mounted relative to said valve stem to exert a progressively greater compressive force upon said valve stem upon compression of said valve springs, and an adjustable pressure plate assembly for pre-compressing of the compression springs so as to set the relief pressure at a desired pressure value. A preferred embodiment is directed to that comprising a valve stem assembly for preventing the valve spring from being compressed beyond a predetermined selected point of relief pressure.

Abstract: A back pressure inducer and check valve is disclosed for use with a fluid system having inlet passageway, an outlet passageway and in which fluid flows from the inlet and to the outlet passageway. The back pressure inducer comprises a valve seat secured to the system and having a fluid port fluidly between the inlet and outlet passageways. A valve member is movable between a closed and open position to variably open the fluid port while a spring urges the valve member towards its closed position. Cooperating conical surfaces on the valve member and valve seat form an annular passageway when the valve member is in its open position to produce controlled pressure drops between the inlet and outlet conduit over a wide range of fluid flow rates.

Abstract: A check relief valve particularly suited for use with corrosive fluids includes a body having an input port and an output port connecting a fluid passageway therebetween. A ring spring is mounted to the body along the fluid passageway. An annular sleeve is attached to the ring spring. A rod, having a sealing member at one end adapted to engage an annular edge of the sleeve, is lightly biased against the sleeve so that forward flowing fluid flows relatively unhindered while reverse fluid flow is checked. When the pressure at the output port is sufficiently greater than the pressure at the input port, the rod and moveable sleeve cause the ring spring to flex. After the rod has travelled a predetermined distance, movement of the rod is halted so that further movement of the sleeve breaks the seal with the sealing member to allow reverse flow of fluid. Also disclosed is a governor, which includes the check relief valve and pilot valve, for use between a pump, a system and a reservoir.

Abstract: A valve construction wherein a streamlined flow diverter is centered within a cylindrical valve body. A slidable annular seat ring is biased upstream to seal against a seating surface on the inwardly tapered downstream side of the flow diverter and is biased by fluid pressure so that the valve opens when line pressure exceeds the control pressure. The inner contour of the retractable seat ring and the tapered outer contour of the downstream side of the flow diverter are such that the minimum flow area between them occurs a short distance downstream of the seating surface and is thereafter maintained or slightly increased gradually to an abrupt termination of the tapered surface.

Abstract: A swivel valve assembly (10) for an inflatable member (M) permitting passage of a high velocity input of fluid from a pressurized source and providing sealing closure upon pressure equalization including a body (11,12) having a connector (13) for sealing engagement with the inflatable member, a bore (27) in the body communicating with the pressurized source of fluid, a passage (51) in said body communicating with the inflatable member and connecting with the bore, and a movable poppet (55) operative with a sealing member (60) for precluding fluid flow upon pressure equalization and having a disk (66) positioned in the bore for throttling the high velocity input of fluid before passing the sealing member.

Abstract: In order to improve upon the prior arrangement of a valve within a liquid distributor head for a mixing pre-heater degasifier it is proposed that a valve containing a valve plate, valve shaft, valve spring and spring plate, is arranged within the mixing pre-heater centrally within a deflection screen or baffle and at the same time the valve is surrounded by a protective housing in order to prevent that, in the event of possible rupture of the valve spring any broken pieces thereof will drop into the mixing pre-heater.

Abstract: This drip preventing valve is adapted to be installed in a conduit between the discharge outlet of an oil burner pump and the nozzle. The valve responds to the pressure in that conduit and closes whenever the pump stops, thereby preventing leakage or dripping from the nozzle. This valve consists of a body of one or more closed, flexible-walled cells, filled with air at atmospheric pressure. When the valve body is subjected to a greater pressure, it is compressed, thereby opening the valve. When that greater pressure is relieved, the valve closes.

Abstract: A check valve assembly adapted for connection to a high pressure reciprocating pump cylinder, comprising valve body means, inlet check valve means and outlet check valve means. The valve body means has an inlet end adapted for connection to the pump cylinder and an outlet end adapted for connection to a high pressure outlet line. The inlet end has a planar surface adapted to be exposed to the interior of the pump cylinder. The valve body means also includes a low pressure inlet passage opening in the planar surface for providing communication with a source of low pressure fluid and a high pressure outlet passage extending between the planar surface and the outlet end. Such passages are parallel to one another and spaced apart a distance at least as great as the radius of the high pressure outlet passage. The inlet check valve means is mounted entirely on the exposed planar surface in association with the inlet passage and prevents high pressure fluid backflow into the inlet passage.

Abstract: A valve in which a member is movable within the valve body so as to open and close access to a passage within the valve, and, when the movable member is closing access to the passage within the valve, a sealing member is engaged between the movable member and an end wall of the passage. The sealing member is made of a flexible but non-resilient material, and elasticity is imparted by means of a resilient member which causes the non-resilient material to be forced into engagement with the end wall. Limits are set for relative movement of the end wall and the movable member to prevent damaging flexure of the non-resilient material.

Abstract: A valve assembly for controlling the flow of fluid, has a passage for fluid flow therein and open and closed positions whereby fluid flow through said passage is respectively allowed and prevented. First and second mating surfaces define a contact area therebetween when the valve assembly is in its closed position. Relief means is provided for communicating fluid from the passage with an inner portion of the contact area for operably reducing a force required to disengage the mating surfaces and open the valve assembly.

Abstract: A noise damping device is proposed for the reduction and smoothing out of compressional vibrations of a conveying medium, especially fuel conveyed by fuel feed pumps, which device serves for diminishing the continuous pressure vibrations by means of suitable damping installations in the fuel circulation. The noise damping device comprises arrangements comprising locations of discontinuity, cross-sectional changes, changes in the flow path as well as including at least one wall section which yields in an elastically resilient manner, whereby a simultaneous dynamic volume change is likewise produced. Such pressure vibration damping devices can be arranged at any desired point in the fuel circulation, preferably in the zone of the pressure connection of the fuel feed pump, and can have the form of barometric bellows, accordion bellows, corrugated hoses, and the like.

Abstract: The invention contemplates a valve having particular application to the control of flow and pressure within a sanitary-sewer system which includes independently pumped feeders at elevations below an intervening region of greater elevation. The valve, located at the downstream side of the region, of greater elevation, and below the elevation of pumping on the upstream side of the region of greater elevation, provides (a) such a minimum level of pressure at its inlet as to assure against syphoning liquid sewage out of the greater-elevation region, (b) a reduction in hydraulic-head pressure for liquid sewage passed by the valve to the succeeding downstream region of lower elevation, and (c) such balanced response to excessive downstream-region pressure development as to prevent any development of upstream flow through the valve, i.e., such balanced response as to prevent changes in upstream pressure level with fluctuating downstream pressure level.

Abstract: A monoflow ball valve is disclosed that is particularly suited using plastic materials that resist metal-corrosive acids, as in a spray system using hydrofluoric acid and the like. The valve has a valve body with a passage section smaller than the external diameter of the ball and the ball is forced into the generally cylindrical passage section to become a highly effective fluid-tight seal. A spacer at the inlet forms with the ball a second fluid-tight seal and is adjustably movable to dislodge the ball from the passage section if required.

Abstract: A fluid pressure relief valve provides automatic venting of a high pressure source to an area of lower pressure in response to pressure build-up of the source. The valve includes a valve body in which a recess is provided, a passage providing communication between one end of the recess and the source. A poppet is oriented for movement with respect to the recess and includes a sealing element adapted to close the other end of the recess by sealing engagement with the valve body. A spring urges the poppet toward sealing engagement. The poppet has ports proximate the sealing element which are covered when the sealing engagement is maintained but are uncovered progressively with movement of the poppet out of sealing engagement. If the source pressure exceeds a predetermined threshold level, the poppet is driven increasingly away from the sealing engagement with increase in pressure of the source for progressively uncovering the ports in response to dynamic impact upon the poppet by fluid flow through the valve.

Abstract: A drink dispenser spigot comprises a barrel, a valve plunger, a stem for the plunger, and a spout opening in the barrel. A splash deflector collar about the stem is movable therewith. As the spigot is opened by withdrawing the plunger so that it passes over the spout opening to dispense drink, the splash deflector at least partially blocks splashing of the drink through the spout opening and into the barrel. Some drink splash may enter the barrel but the splash deflector has a wiper flange which will wipe interior surfaces of the barrel as the plunger moves toward closed position and wipe drink splash from the inside of the barrel and out through the spout opening.

Abstract: A seat guided poppet valve for fluid compressors and the like having improved flow directing characteristics provided by a poppet element having integral flutes surrounded by a shroud and variable dampening provided by adjustable seals or dashpots. The dashpot may reciprocate with the poppet element or be constrained within the guard. A seat seal is established by conventional abutment of the poppet element head surface with the seat outlet port seating surface, or by eliminating that portion of the poppet element head overhanging the seat outlet port so that the circumferential surface of the head makes a sliding seal with the inner surface of the seat bore. Additional sealing may be provided by a resilient ring entrained within a groove inscribed in the circumferential surface of the poppet element head, or by constructing the circumferential surface of a resilient material which deforms as the head enters the seat bore. Lift washers are provided to control the amount of valve lift.

Abstract: A backflow prevention device is disclosed which includes a spring operated check valve and a shielding member for protection of the spring from transverse fluid flow disturbances. The shielding member is preferably cylindrical in shape and surrounds the spring longitudinally about 40% to 90% of the extended spring length.

Abstract: This invention relates to a non-return valve or check valve in the form of a piston-type slide-valve comprising a substantially rotationally-symmetrical outer housing and a likewise substantially rotationally-symmetrical inner housing which is arranged centrally therein and which is of streamline configuration, a free annular space serving as a flow passage between the outer and the inner housings which annular space is subdivided by connecting webs and can be shut off by a piston which can be extended coaxially from the inner housing, under spring pressure, against the direction of flow of a flow medium.