Abstract: A cap for closing a sprayer tank has integrated therein a pressure relief valve having a tubular member providing a seat with respect to which a valve provided by an o-ring on a stem is displaced in a direction against the seat to close the valve. The stem is connected at one end thereof to a cap and is biased by a spring around the stem at the opposite end thereof into closing position. The cap is guided by a rim around the seat member. The cap defines around the stem a chamber. This chamber communicates with a spout which directs pressurized flow away from the cap when it is rotated to manually open the valve against the bias of the spring so as to relieve pressure in the tank.

Abstract: A valve assembly (1) included in a system for measuring differential pressures in a fluid system and where the valve assembly (1) includes a valve body (7) with an inlet (13) and an outlet (14) for connection to the fluid system, ducts (32, 33) for communication with a differential pressure sensor (12) for registration the differential pressure, a cavity (22) including a calibration cone (10) which is movable in the cavity (22) between a measuring position and a position for zero point calibration/flushing via the valve assembly (1). In instances when the measuring position of the device does not exists, the calibration cone (10) separates the differential pressure sensor (12) from the fluid system, i.e., in its initial position, and, at the same time, the valve assembly (1), in this position, is automatic flushed so as to get rid of any enclosed air in the valve assembly (1).

Abstract: A valve assembly (1) for measuring differential pressures in a fluid system where the valve assembly includes a differential pressure sensor (12) for registration of differential pressures, a first cavity (22) with a calibrating cone (10) displaceable between measuring and a zero point calibration/flushing position. The valve assembly (1) includes a valve body (7) with two connections (13, 14) and a second cavity (15) arranged with a safety valve cone (8) which protects the differential pressure sensor (12). The safety valve cone (8), by differential pressures higher than a dimensioned value, is moved in a direction towards the low pressure side and, as a result, a passage between high and low pressure side is opened, from one connection (13) to the other connection (14) via the second cavity (15) and via provided cavities (24) and recesses (25) in the safety valve cone (8), whereby a pressure equalizing occurs.

Abstract: A relief valve for an oil pump, may include a housing defining a relief space, a plunger slidably disposed in the relief space and dividing the relief space into a housing chamber and a plunger chamber, an elastic member elastically supporting the plunger and being compressed by oil pressure of the main gallery, wherein the oil pressure of the main gallery may be relatively lower than an oil pressure under a warm-up state of the engine, a locator disposed under the plunger and supporting the elastic member, a plug coupled to a lower portion of the housing under the relief space and supporting the locator such that a modulus of elasticity in the elastic member may be changed by a change in seat position of the elastic member, and a negative pressure supplier selectively generating negative vacuum pressure in the locator such that a height of the locator changes.

Abstract: A pressure relief valve includes a housing including an inlet chamber adapted to be in communication with an outlet of a pump and an outlet chamber adapted to be in communication with a pump inlet. The housing includes a bore having a first end in communication with the inlet chamber and a main spill aperture in communication with the bore and the outlet chamber. A piston includes an orifice and an axially spaced apart aperture. The piston is axially moveable within the bore between a first position whereat the piston seals the inlet chamber from the outlet chamber, a second position whereat the inlet and outlet chambers are in fluid communication with one another via only the orifice, and a third position whereat the inlet and outlet chambers are in fluid communication with one another via the orifice and the aperture. A spring biases the piston toward the first position.

Abstract: A relief valve (100) is provided, including a floating piston (120) configured to move reciprocally in a piston chamber (103) in response to fluid pressure, a circumferential seal (124) located on the floating piston (120), a biasing device (130) configured to keep the floating piston (120) within a piston float movement range, wherein the fluid is held when the floating piston (120) is within the piston float movement range and the fluid is exhausted when the floating piston (120) exceeds the piston float movement range, and one or more relief grooves (107) formed in a sidewall (106) of the piston chamber (103). The one or more relief grooves (107) are configured to conduct fluid around the floating piston (120) and the circumferential seal (124) when the floating piston (120) is compressed to a predetermined relief location in the piston chamber (103).

Abstract: A valve member having a valve part and a piston part is accommodated in a piston accommodation cylinder part of a case reciprocatably, and a damper chamber that is substantially a sealed space is formed in an anti-valve seat side in the valve member so that fluid flows without flowing via the damper chamber. Accordingly, since the fluid does not pass through the damper chamber, a fluid force that occurs in the piston part due to a fluid flow does not change easily, thus it becomes difficult to increase hunting at the valve members. Moreover, in a vibrational component in the valve member reciprocating direction of the valve members, amplitude of the vibration can be decreased by a damping force generated in the damper chamber.

Abstract: A flow controllable connector for home appliances, which diverges or extends a passage of fluid by fastening an inlet having a first passage and an outlet having a second passage to tubes using fastening devices. The connector includes a control device disposed between the inlet and the outlet in order to prevent the fluid from flowing back as well as to control a flow rate. The control device performs both the function of preventing the fluid from flowing back and the function of controlling the pressure of the fluid. This makes it possible to prevent an electric/electronic sub-assembly from malfunctioning or abnormally operating, thereby increasing the longevity and reliability thereof.

Abstract: A relief valve includes a valve body having a first port through which fluid flows in and a second port through which the fluid is discharged, a sleeve arranged so as to be slidable within the valve body and formed with an inlet being communicatable with the first port and an outlet being communicatable with the second port, a valve being slidable within the sleeve by receiving a fluid pressure of the first port flowing through the inlet in order to establish a closing state at which the outlet is closed by the valve and an opening state at which the outlet is opened, a biasing member applying a biasing force to the valve and a valve position adjusting mechanism actuated for operating the fluid pressure of the first port so as to act on the sleeve in a direction of the biasing force of the biasing member and changing the position of the sleeve relative to the valve body by turning on or off the operation of the fluid pressure of the first port so as to act on the sleeve.

Abstract: A valve includes a body, a cavity in the body, and a check valve formed in the cavity. The check valve includes a poppet having a first end and a second end, and a first seat and a second seat, wherein the first seat is formed at the first end, the second seat is formed at the second end, and a diameter of the second seat is greater than a diameter of the first seat.

Abstract: A variable performance valve for use in a fuel nozzle is presented. The valve includes a spring, an inner spool having a port, an outer sleeve, and an orifice, which in a fuel nozzle application may be a calibration orifice. In a low flow condition, the inlet to downstream pressure is the spring force divided by the area on which the pressure acts. At low flow the orifice does not cause any appreciable pressure drop. As the flow increases, a pressure drop develops across the orifice. Since the pressure drop across the valve cannot be greater than the spring force divided by valve area, the valve is forced to open to compensate. As flow is increased, the valve will stroke completely open and the pressure drop at the port becomes negligible and the pressure drop across the orifice is nearly 100% of the pressure drop across the valve.

Abstract: A relief device includes a relief housing constituted by a relief inflow portion, a valve passage portion, a recess, and an oil discharge portion having a relief hole; a relief valve having a small-diameter portion between a first large-diameter portion and a second large-diameter portion; and a spring elastically biasing the relief valve toward the relief inflow portion. The recess is formed at a position that is closer to the relief inflow portion side than to the oil discharge portion, the axial length of the recess is larger than the axial length of the first large-diameter portion of the relief valve, and the shortest axial distance between the recess and the relief hole is less than the axial length of the small-diameter portion.

Abstract: A bypass valve assembly for a generator includes a spring cover with a flange which extends in a radial direction from a spring cover body. The spring cover body defines an overall length dimension, the overall length dimension to an end of the spring cover body to the flange dimension defines a ratio between 1.6:1-1.2:1. The bypass valve assembly also includes a valve sleeve with a multiple of windows. Each of the multiple of windows includes a longitudinal edge which defines a longitudinal edge radius and corner radius.

Abstract: A pressure limiting valve comprises a valve closing body (7) which comprises a valve closing surface (8) which together with a first valve seat (9) opposing the valve closing surface (8) forms a first seal seat and a valve closing body orifice (11), which is surrounded by a second valve seat (12) which together with a closing head (14) configured on an axially displaceable valve bolt (13) forms a second seal seat and with a spring plate (15) which is connected to the valve bolt (13) and axially displaceable therewith, and a first return spring (10) clamped between the spring plate (15) and the valve closing body (7), which pretensions the valve bolt (13) against the second valve seat (12) configured on the valve closing body (7) and a second return spring (35) which pretensions a valve unit (7, 13, 15, 10) against the first valve seat (9). In the valve bolt (13) a longitudinal bore (53) is provided extending over the entire axial length of the valve bolt (13).

Abstract: To provide a relief valve structure for an oil pump, which is capable of appropriately controlling/switching the discharge pressure and flow rate of oil to an optimum condition in low, middle and high speed regions of an engine. The relief valve structure has: a relief valve having formed therein a valve flow path for communicating between a valve head part and an outer circumferential side part; a valve housing in which a valve passage accommodating the relief valve is formed; a relief flow-in part formed on an axial direction one end side of the valve passage and communicating with the valve passage; a first discharge part formed in the valve housing and communicating with the valve flow path by the movement of the relief valve; and a second discharge part that is opened by allowing the valve head part to pass therethrough. The second discharge part is positioned nearer to the relief flow-in part than the first discharge part.

Abstract: A conduit protection system, comprising: a conduit for carrying a fluid; a sealed vessel surrounding the conduit along a protected zone of the conduit; and a valve moveable between a first position for obstructing fluid flow through the protected zone of the conduit and a second position for enabling fluid flow through the protected zone of the conduit, wherein the valve is biased to the first position, and wherein the valve is fluidically coupled to the sealed vessel such that a positive pressure within the sealed vessel is operable to move the valve to the second position against the bias. Also, a method for protecting a fluid carrying conduit.

Abstract: A steam supply passage incorporates a pressure reducing valve and the passage further incorporates a steam ejector downstream of the pressure reducing valve. A suction portion of the steam ejector is connected to a re-evaporation tank for re-evaporating steam condensate via a suction passage. Passage steam of the pressure reducing valve is used as a driving steam for the steam ejector. In operation, re-evaporated steam within the re-evaporation tank is suctioned by the steam ejector to be mixed with the passage steam. The suction passage incorporates a check valve for preventing reverse flow of steam to the re-evaporation tank.

Abstract: A check valve assembly for well stimulation operations. The check valve assembly includes a valve body having an axially extending passageway including an inlet and a valve body seat. The valve body has a discharge port extending laterally from the passageway. A valve cap slidably engages with the valve body and has an opening with a valve cap seat. A piston is disposed within the passageway. In a closed position, a first sealing surface of the piston engages the valve body seat to prevent fluid communication between the inlet and the discharge port. In an open position, a second sealing surface of the piston engages the valve cap seat allowing fluid communication between the inlet and the discharge port. A spring disposed within the passageway between the piston and the valve cap biases the piston toward the closed position.

Abstract: An illustrative valve cartridge for a pump system is disclosed. In one example the valve cartridge includes a cartridge body, a mounting flange operatively coupled to the cartridge body, wherein the mounting flange is adapted to be coupled to a housing of a pump, a valve member that is adapted to sealingly engage a valve seat within the pump housing and an actuator positioned within the cartridge body, wherein the actuator is operatively coupled to the valve member via a connector and wherein the actuator is adapted for selectively moving the valve member relative to the valve seat when the valve cartridge is operatively coupled to the pump housing.

Abstract: An illustrative valve is disclosed that includes a valve body, a valve seat disposed within the valve body that has a first curved sealing surface and a valve member having a second curved sealing surface that is adapted to sealingly engage the first curved sealing surface, wherein the first and second curved sealing surfaces are opposed curved sealing surfaces.

Abstract: A pressure retention valve including a housing having an inlet passage and an outlet passage that can be connected together and a separating diaphragm subdividing the housing into two portions, wherein, in operation of the valve, a first portion conveys fluid and a second portion is fluid-free. The valve further includes a valve seat defining an end of the inlet passage, arranged in the fluid-conveying portion of the housing, and has a first sealing surface, a shut-off body which is arranged movably in the fluid-conveying portion of the housing and has a second sealing surface, and a spring element having a spring force, which is arranged in the fluid-free portion of the pressure retention valve.

Abstract: The aim of the invention is to protect hydraulic assemblies, in particular those used for hydraulic longwall working in coal mining. To achieve this, pressure regulating valves (1) are used, the damping chambers of which (20) are located, configured and connected to the inlet side (5) in such a way that a system pressure constantly prevails in said chamber (20) and only drains in a restricted manner when the pressure in the regulating valve (1) is released, thus preventing the occurrence of detrimental vibrations.

Abstract: The present invention regards a device designed for injection of fluids in a well bore, typically an offshore well bore for petroleum production and gas injection/gas lift system for fluid injection. The device comprises a outer hollow housing (1) with an internal body (2) moveable within the outer housing (1) with an internal bore (3) which in a first closed position is closed with a metal to metal seal system between the outer housing (1) and the internal body (2), which internal body (2) is operated by pressure differential across the internal body (2), where the internal body (2) is designed with slots (4) forming outlets of the internal bore (3) which in an open position of the device is positioned outside of the outer housing (1).

Abstract: The present invention regards a device designed for injection of fluids in a well bore, typically an offshore well bore for petroleum production and gas injection/gas lift system for fluid injection. The device comprises a outer hollow housing (1) with an internal body (2) moveable within the outer housing (1) with an internal bore (3) which in a first closed position is closed with a metal to metal seal system between the outer housing (1) and the internal body (2), which internal body (2) is operated by pressure differential across the internal body (2), where the internal body (2) is designed with slots (4) forming outlets of the internal bore (3) which in an open position of the device leads to the outside of the outer housing (1).

Abstract: A relief valve for an oil pump, may include a housing defining a relief space, a plunger slidably disposed in the relief space and dividing the relief space into a housing chamber and a plunger chamber, an elastic member elastically supporting the plunger and being compressed by oil pressure of the main gallery, wherein the oil pressure of the main gallery may be relatively lower than an oil pressure under a warm-up state of the engine, a locator disposed under the plunger and supporting the elastic member, a plug coupled to a lower portion of the housing under the relief space and supporting the locator such that a modulus of elasticity in the elastic member may be changed by a change in seat position of the elastic member, and a negative pressure supplier selectively generating negative vacuum pressure in the locator such that a height of the locator changes.

Abstract: There is disclosed a sealing bush as well as a hydraulic unit fitted with the sealing bush and a check valve. The sealing bush is made of plastic and has, on an end face, a preferably conical elevation that can be brought into sealing contact with a bearing shoulder.

Abstract: A full flow pressure relief valve includes a housing having an inlet opening on its bottom and an outlet opening on one of its side. A piston is positioned inside the housing adapted to move from a set position where the piston seals the inlet opening to a sprung position where the piston is removed from the inlet opening. A lock is biased by a spring in a perpendicular direction toward the side of the piston. The lock is adapted to hold the piston in the set position until a relief pressure is supplied in the inlet opening, where the lock is adapted to release the piston to the sprung position.

Abstract: A check valve for use in a pump of a hydraulic cylinder includes a tubular member having a sheath member received therein. The pump includes a chamber provided in an output pipe thereof for receiving the check valve. The tubular member is constructed in the form of a hollow cylinder and includes a sealing sleeve fitted therearound. The tubular member includes an oil seal mounted on the front end thereof for the engagement with a hollow screw element in the chamber. The sheath member includes a hollow cap member, a first spring element, a ball, a hollow disc element, and a second spring element which are placed into the tubular member in turn. By using the hollow disc element and the second spring element, the tubular member may be fixed in the chamber, and by way of the screw element, the tubular member is enclosed in the chamber.

Abstract: The invention relates to a pressure limiting valve with a hydraulic seal ring (12), characterized in that the sealing element (6), for securing the flow gap (10) between the consumer connection (3) and the pressurized fluid outlet (4), is embodied as a seal ring (12) with a limited flexibility. Said seal ring (12) is inserted without preload into a groove (13) provided therefore, whereby said groove (13) is embodied so as to allow the flow of pressurized fluid (11) behind the seal ring (12).

Abstract: The invention relates to a pressure limiting valve. The pressure limiting valve comprises a valve holder a valve insert connected to the valve holder a valve piston slidably supported in the valve insert and a compression spring acting on the valve piston in the closing direction. Between the valve piston and the compression spring an adjusting shim is disposed such that the compression spring is braced on one end on a bottom piece of the valve holder and on the other on a face of the adjusting shim facing away from the valve piston.

Abstract: In an electric pump unit, communication between arcuate ports provided in correspondence with a discharge side and a suction side of an internal gear pump is selectively permitted and prohibited in correspondence with movement of a spool of a relief valve. If fluid pressure at the discharge side of the internal gear pump becomes greater than or equal to a predetermined value, the spool moves across an inner arc of one of the arcuate ports corresponding to the suction side of the internal gear pump and from a position at which the spool prohibits the communication between the arcuate ports to a position at which the spool permits the communication. As the spool moves away from the position at which the spool blocks the communication between the arcuate ports, the opening degree of the relief valve changes in accordance with a downward convex curve.

Abstract: A control valve is provided that includes a valve body, a valve element, a first radial seal, and a second radial seal. The valve body forms an inlet, an outlet, and a fluid flow passage therebetween. The valve element is disposed at least partially within the valve body, and is movable between at least a closed position and an open position. When the valve element is in the closed position, fluid is restricted from flowing through the fluid flow passage. When the valve element is in the open position, the fluid is allowed to flow through the fluid flow passage. The first radial seal is disposed against the valve body at a first distance from a centerline of the control valve. The second radial seal is disposed against the valve body at a second distance from the centerline, the second distance being greater than the first distance.

Abstract: An anti-siphon check valve assembly 20 has an upper portion 4 body housing with a shut off seat 9 or seal 6 and a lower portion 3 body housing for attachment to the upper portion 4 body housing. Inside the body housing is an internal float 5 and a compression coil spring 8. The internal float 5 has a shut off seal 6 for engaging a shut off seat 9. The compression coil spring 8 for biasing the internal float 5 to a shut off position wherein the seal 6 engages the shut off seat 9. The check valve opening force is less than 1 psi, preferably less than 0.5 psi, more preferably 0.25 psi or less. The anti-siphon check valve assembly 20 also has an “O” ring seal 7 to seal the upper portion 4 of the body housing to the lower portion 3 of the body housing. The shut off seal 6 can be made as a washer gasket.

Abstract: A variable performance valve for use in a fuel nozzle is presented. The valve includes a spring, an inner spool having a port, an outer sleeve, and an orifice, which in a fuel nozzle application may be a calibration orifice. In a low flow condition, the inlet to downstream pressure is the spring force divided by the area on which the pressure acts. At low flow the orifice does not cause any appreciable pressure drop. As the flow increases, a pressure drop develops across the orifice. Since the pressure drop across the valve cannot be greater than the spring force divided by valve area, the valve is forced to open to compensate. As flow is increased, the valve will stroke completely open and the pressure drop at the port becomes negligible and the pressure drop across the orifice is nearly 100% of the pressure drop across the valve.

Abstract: This invention relates to valve assemblies having a valve seat body having an axial bore therethrough; wherein the valve seat body has an inclined seat surface located on an upper end of the seat body. The valve assemblies further include a valve member having a valve body such that the valve body is positioned within the axial bore of the valve seat body. A seal is disposed between the seat surface of the seat body and an annular seal surface of the valve member such that the seal prevents contact between the seat surface of the seat body and the valve member.

Abstract: Sequence valves 10 (FIGS. 1-7) and 210 (FIG. 8) are disclosed for use in a hydraulic circuit (FIG. 2). Sequence valve 10 provides a control signal through a control signal port 20, 60 to a pressure responsive flow source 122 to maintain pressure in an accumulator 124 between a low pressure setting (point b in FIG. 7) and a high pressure setting (point c in FIG. 7). When the pressure in the accumulator 124 falls from its high pressure setting to its low pressure setting, the control signal from control signal port 20 of the sequence valve 10 increases (from point f to point g in FIG. 7). When this occurs, the flow source 122 is loaded and operates to provide fluid flow to charge the accumulator 124. When the pressure in the accumulator 124 reaches its high pressure setting, the control signal from the control signal port 20 falls to a low level (point i in FIG. 7) and remains at that low level until the accumulator 124 again needs to be charged.

Abstract: A bypass valve assembly for a generator includes a spring cover with a flange which extends in a radial direction from a spring cover body. The spring cover body defines an overall length dimension, the overall length dimension to an end of the spring cover body to the flange dimension defines a ratio between 1.6:1-1.2:1. The bypass valve assembly also includes a valve sleeve with a multiple of windows. Each of the multiple of windows includes a longitudinal edge which defines a longitudinal edge radius and corner radius.

Abstract: A flow control device for automatically controlling the flow of a fluid at a predetermined rate that is capable of taking measurements of the pressure of the fluid within the device while the device is functioning and that is capable of real-time adjustment of the flow rate is provided. Said device includes a casing having a casing outlet, a piston having a piston inlet and an edge, wherein said piston interfaces with the casing in a manner such that the edge is cooperable with the casing outlet to control the flow of fluid through the device. A biasing member, such as a spring, for biasing the casing with the piston is further included, as is a sensor, such as a pressure transducer, for measuring the pressure within the interior of the casing.

Abstract: A thermostatic mixing valve (TMV) including a low-flow passageway and a high-flow passageway connecting a mixing chamber and a sensing chamber, and a check valve received in the high-flow passageway adapted to open and allow additional flow from the mixing chamber to the sensing chamber upon fluid flow through the valve rising to at least a predetermined high flow rate. The TMV accommodates a wide range of flows yet does not allow excess flow to bypass the sensing chamber which contains a thermal motor of the valve. Even at high flow rates, therefore, the TMV accurately mixes fluid.

Abstract: A hydraulic valve having a first fluid chamber hydraulically connected to a pressure source, a second fluid chamber hydraulically connected to a pressure operator, and a blocking member for controlling fluid flow between the first and second chambers. The blocking member substantially blocks fluid flow between the first and second chambers when a pressure of fluid in the first chamber is greater than a minimum pressure and less than a pressure of fluid in the second chamber. The blocking member is displaceable to enable fluid flow between the first and second chambers when the pressure of fluid in the first chamber is below the minimum pressure.

Abstract: An anti-backflow valve, including a valve seat and a plug slidingly disposed in the valve seat, is provided. The valve seat has a ring portion protruding inwards at a middle section of a flow passage thereof. The ring portion has a seat portion extended outwards on one side thereof. The plug has an accommodating chamber recessed inwards on one side thereof. The accommodating chamber has an opening radially penetrating through the plug at one end thereof distant from an inlet. The plug has a protruding portion at one end thereof adjacent to the inlet. An outer diameter of the protruding portion is larger than an inner diameter of the ring portion. A spring is provided between the protruding portion and the ring portion, and a portion of the plug penetrating through the ring portion has an O-ring engaged thereon corresponding to the seat portion.

Abstract: A pilot-to-open soft seat check valve having a soft seat and zero leakage is described. The check valve includes a valve body with a poppet bore and an annular valve seat around the bore; a poppet moveable axially between open and closed positions within the bore, the poppet having an annular valve face; a spring urging the poppet to its closed position with the annular valve face against the valve seat; an annular O-ring clamp around the bore adjacent the valve seat, the clamp including an annular O-ring channel with a radially inward open groove exposing the O-ring to the bore; and a resilient O-ring within the channel, whereby the poppet contacts the O-ring ring when the poppet is in its closed position and the O-ring is held in the O-ring channel by the O-ring clamp when the poppet is in its open position.

Abstract: A check valve for use with a pump is disclosed. The check valve may have a body at least partially defining a central bore with an open end and a closed end, and a spring guide separate from the body and disposed within the closed end of the central bore. The check valve may also have a spring located within the central bore and having a first end operatively engaged with the spring guide, and a valve element operatively engaged with a second end of the spring and being movable by a pressure differential to compress the spring. The spring guide may be moveable relative to the body.

Abstract: A multi-stage check valve includes a valve housing defining an internal valve chamber. A main valve member within the valve chamber of the valve housing has an internal valve chamber. In the first position thereof the main valve member blocks fuel below a predetermined main pressure from flowing through a main fuel path. In the second position thereof the main valve member is displaced to allow fuel above the predetermined main pressure to flow through the main fuel path. The multi-stage check valve also includes a pilot valve member within the valve chamber of the main valve member. In the first position thereof, the pilot valve member blocks fuel below a predetermined pilot pressure from flowing through a pilot fuel path. In the second position thereof, the pilot valve member is displaced to allow fuel above the predetermined pilot pressure to flow through the pilot fuel path.

Abstract: A pressure control valve includes a housing, a piston within the housing, a biasing means within the housing for biasing the piston to seat in a first position for limiting fluid communication between an inlet port of the housing and an outlet port of the housing, and an insert cooperating with the biasing means for setting a pressure differential between an inlet side of the piston and an outlet side of the piston that unseats the piston from the first position for establishing fluid communication between the inlet port and the outlet port.

Abstract: In one embodiment, a solenoid valve includes a supply port that fluidly communicates with a source of compressed air, a delivery port, a bore that selectively fluidly communicates with the supply and delivery ports, an armature in the bore, a pole piece in the bore, and a coil that is selectively energized with electrical power. The coil is around the armature and pole piece. The armature and pole piece selectively sealingly engage and move as an armature/pole piece single unit as a function of the electrical power in the coil. A position of the armature/pole piece within the bore controls fluid communication between the supply port and the delivery port.

Abstract: A subsea coupler has an internal chamber (6) adapted for the reception of fluid under pressure, a passageway (7) for the ingress of fluid to the chamber, a valve seat (9) in the passageway, a poppet comprising a body (4) which is engageable with the valve seat to close the passageway and a head (3) which fits against the body and is moveable away from the body. The body (4) includes a channel (11, 12) for communicating fluid pressure from the internal chamber to a region between the head and the body whereby the head can be moved away from the body to relieve pressure in the chamber while the body is in engagement with the valve seat.

Abstract: A valve that includes a housing defining first and second bores having a central axis, and a peripheral valve seat. An actuator is located in the first bore and has a reciprocating seal disposed for movement along the central axis for engaging the valve seat and closing the valve. A coiled return spring is mounted in the housing for urging the reciprocating seal towards the chamber to open the valve, the return spring having a first end connected to the reciprocating seal and a second end engaging a spring support in the housing facing the first bore. The return spring may have a larger diameter at its second end than its first end. The housing may include a third bore in communication with the second bore and having a different cross-sectional area than the second bore. A closure cap formed from moldable material may close an opening in the housing, the closure cap being sealably joined to the housing by a welded joint.

Abstract: A relief valve includes a body, a damping chamber in the body, a poppet in the body, wherein the poppet includes an end in the damping chamber, and a check valve in the damping chamber. The damping chamber is located adjacent an inlet side of the relief valve, and the check valve includes a sealing member to prevent fluid flow into the damping chamber at the inlet side. The sealing member is unseated during opening of the poppet to permit fluid to flow into the damping chamber at the inlet side.

Abstract: A valve means has a valve housing, in which an inlet duct for pressure fluid extends, the duct opening into a valve chamber, in which a valve member is held by spring means in a closed position engaging a valve seat, the valve member opening at a predetermined opening pressure of the pressure fluid present so that pressure fluid arrives by way of an opening cross section at a fluid outlet and flows from it, and the valve means comprises a control duct by way of which pressure fluid flows into a control chamber, in which a control member is held clear of a control seat by spring means in an open position, the control chamber being connected by way of a connecting duct with the valve chamber; and in which the control member so controls the exit flow of the pressure fluid that the control member is able to be shifted, prior to opening of the valve member at a control pressure below the opening pressure into engagement with its control seat so that the passage of fluid between the control chamber and the valve ch