Abstract: A variable displacement vane pump including a relief valve which includes a valve bore, a spherical valve element in the valve bore, a valve seat fixed onto one axial side of the valve bore and having a through hole and an annular seat surface on which the valve element is seated when the relief valve is in a closed position, a coil spring disposed on the other axial side of the valve bore, and a valve element retainer disposed between the valve element and the coil spring, wherein the seat surface is configured such that when the relief valve is in the closed position, a center of the valve element is located offset from a central axis of one winding seating portion of the coil spring which is disposed on an opposite side of the seat surface, in a radial direction of the valve bore.

Abstract: Disclosed herein is a check valve of a brake system to enable easy processing and assembly through a simplified structure. The check valve for brake systems includes a valve sheet housing press-fitted to a step of a hydraulic block provided with an oil passage, the valve sheet housing including an upper part having an opening and a lower part having an open/close hole to form an oil channel in an inner part, a ball provided in the valve sheet housing to open or close the oil channel, and a spring to elastically support the ball, wherein the valve sheet housing is provided in the upper part thereof with a plurality of fixing protrusions that protrude in an inside diameter direction along a circumference of the opening to support the spring.

Abstract: A pressure control valve has a non-uniformly tapered valve bore that has an increasing diameter as it extends downstream. An interface angle, defined in part between a valve ball and the valve bore in the area of the smallest gap between them, increases as the valve ball is increasingly displaced away from a valve seat of the valve bore.

Abstract: A check valve having a spherical valve body received in a valve chamber, a valve seat for blocking the flow of fluid from the valve chamber toward an inflow port when having the spherical valve body seated thereon, and a plate-like resilient member arranged across the valve chamber. The resilient member has an annular fixed portion fixed on a circumferential wall of the valve chamber and a tongue piece portion radially extending from a radial one side of the annular fixed portion to extend an end thereof beyond an inner edge on a radial other side of the annular fixed portion. The tongue piece portion is formed to be deflected toward the valve seat side from the fixed portion and is resiliently contacted with the spherical valve body at a center part thereof for disengageably pressing the spherical valve body against the valve seat.

Abstract: An oil jet assembly includes a body, a tube, a cap insert, a ball, and a spring. The body includes a bore passing longitudinally through the body; a tube aperture passing through the body near a first end of the body; and an opening at a second and opposite end of the body. The tube is attached to the body and in fluid communication with the tube aperture. The cap insert is positioned within the bore of the body. The cap insert includes a bore that passes longitudinally through the cap insert to form a wall. The cap insert also includes an oil exit aperture passing though the wall and is in fluid communication with the bore of the body. The ball and spring are positioned within the bore of the insert cap. The spring is positioned between the ball and the first end of the body.

Abstract: Various embodiments are directed to a modular valve apparatus. The modular valve apparatus includes a retaining component having an opening on either end. The modular valve apparatus further includes a cap component having a hole bored through. The cap component may be adapted to be coupled with the retaining component. A generally annular spring component may be disposed within the retaining component and seated on a lower end extending axially toward an upper end of the retaining component. A check ball may be disposed within the retaining component and seated on the spring component. The check ball may be adapted to block the opening bored through the cap component while being held in place by the spring component.

Abstract: Provided is a hot air blower comprising a fuel tank for storing fuel, an air compression pump for sucking air and compressing the air, a pressure regulation valve installed at the air compression pump to reduce the pressure of the compressed air, a burner assembly for receiving the fuel from the fuel tank and the air from the air compression pump, and a combustion chamber for receiving the fuel from the burner assembly and combusting the fuel, wherein the pressure regulation valve includes a high pressure regulation valve and a low pressure regulation valve, and a valve opening/closing means is installed at the low pressure regulation valve.

Abstract: A poppet valve for a hydraulic coupling member has an internal, spring-loaded check valve (which may be a ball check valve) in fluid communication with a bleed passage. The check valve may be configured as a pressure-relief valve which bleeds off excess hydraulic fluid pressure within the coupling member to a preselected value. A poppet valve according to the invention may be used in female coupling members and/or male coupling members. Certain embodiments of the invention may be retrofitted to coupling members of the prior art.

Abstract: A pressure regulator valve replacement assembly for maintaining a flow of transmission fluid to various fluid circuits within a Honda automatic transmission during low torque operation of a torque converter is disclosed. To accomplish this, the pressure regulator valve replacement assembly includes a valve piston subassembly having control diameters, and a valve chamber containing a check ball.

Abstract: A pressure regulator (10) includes a fuel tube (30) having an inlet end (35), an outlet end (180), and a fuel chamber (40). The outlet end defines a valve seat (70). A valve element (80) engages the valve seat in a closed position to prohibit flow of fuel from the inlet end to the outlet end. The valve element moves to an open position when pressurized fuel builds in the fuel chamber. A valve biasing member (90) biases the valve element towards the valve seat in opposition to the pressurized fuel in the fuel chamber. The fuel tube includes pressure differential creating structure (170) at the outlet end thereof to create a pressure differential around the valve element and cause unbalanced fuel flow at the outlet end to promote the valve element to move towards a certain location at the outlet end when the valve element moves to the open position.

Abstract: A check valve is installed in the pressure flow line of an abrasive blaster of the type having a pop-up valve which opens under pressure and closes when depressurized to a predetermined level. The check valve is upstream of the pop-up valve and includes a having a valve chamber in communication with the pressure system for seating a valve mechanism adapted for opening and closing the valve chamber in response to the pressure level in the pressure system for closing the pressure system to back flow when the pressure in the system reaches a predetermined level.

Abstract: An improved grease coupler 3 allows for positive, coupling and uncoupling from a grease nipple 4 via a manually operated trigger mechanism 30. The coupler includes a replaceable seal 13 and has an elongate body 10 with a grease passage 11 through the length of the body. A floating barrel plunger 42 acts as a check valve to prevent grease leaking from the discharge end of the elongate body 10 upon disconnection.

Abstract: Disclosed is a check valve of a hydraulic brake system. The check valve includes a valve housing which includes a tapered front end having a smaller diameter than a middle end, the cylindrical middle end extending from the front end by a predetermined length to allow the ball and spring to be accommodated within the middle end, a rear end stepped from the middle end to have a greater diameter than the middle end, and a flange circumferentially bent from the rear end to have a greater diameter than the rear end, and a valve seat having an outer diameter equal to an inner diameter of the rear end so as to be press-fitted into the rear end of the valve housing. The check valve having a simplified configuration achieves size and weight reduction and is manufactured at low cost and high processing efficiency using pressing.

Abstract: The high pressure lubricant pump for steelworks has a body provided with at least one cylinder, the cylinder having a lubricant intake port and a lubricant delivery port. Within the cylinder a piston is movable to pressurize the lubricant. The cylinder and the piston define a pre-assembled pumping unit removably fixed into a seat of the body.

Abstract: An improved assembly of a foam soap dispenser control valve includes a lower casing, an upper casing and a valve body. In addition, a spring is installed in a protruding tube of the valve body, and a steel ball is disposed at the tip of the spring, and a bushing is sheathed onto the external periphery of the protruding tube for abutting the steel ball tightly against the top of the protruding tube and the internal side of the upper edge of the bushing, and a hollow joint bushing is protruded from the top of the upper casing, and the top of the joint bushing is a closed end, and a soap feeding inlet is disposed on a side of the bottom of the joint bushing, such that the upper casing and the lower casing can be engaged by screws to form the improved assembly of the soap dispenser control valve.

Abstract: A pump of an electronically controlled brake system. The pump includes a bore formed in a modulator block and connected with a suction port and a discharge port, a piston installed in the bore in a reciprocating movable manner and defining an inlet path therein, an inlet valve to open or close an exit-side end of the inlet path according to a position of the piston, and an outlet valve provided at one side of the bore, operations of the inlet and outlet valves being contrary to each other. The outlet valve includes a valve seat, a sleeve to surround the valve seat, an outlet ball interposed between the sleeve and the valve seat and used to open or close a path defined in the valve seat, and a valve cap provided at one side of the sleeve to isolate an interior from an exterior of the bore. One or more of the valve sheet, sleeve, and valve cap are formed by press-forming, to achieve improved assembly efficiency and reduced manufacturing costs.

Abstract: A variably tensionable check valve with a first end and a second end that includes a housing, a tension adjuster, a resiliently deformable elastic member, and a flow restriction member biased in a closed position. The housing includes a first portion, a second portion, and first and second passageways with a transition portion therebetween. The second portion includes at least one peripherally extending raised rib and a second internal passageway. The surface area of a cross-section of the first internal passageway is greater than the surface area of a cross-section of the second internal passageway. The tension adjuster, the elastic member, and the flow restriction member are located within the first internal passageway, wherein the tension adjuster secures the elastic member and the flow restriction member within the first internal passageway, and wherein rotational movement of the tension adjuster modifies the biasing force of the elastic member.

Abstract: A pump including a bore formed in a modulator block and connected with a suction port and a discharge port is provided. The pump includes a piston installed in the bore in a reciprocating movable manner and defining an inlet path therein, an inlet valve to open or close an exit-side end of the inlet path according to a position of the piston, and an outlet valve provided at one side of the bore, operations of the inlet and outlet valves being contrary to each other. The outlet valve includes a valve seat, a sleeve to surround the valve seat, an outlet ball interposed between the sleeve and the valve seat and used to open or close a path defined in the valve seat, and a valve cap provided at one side of the sleeve to isolate an interior from an exterior of the bore.

Abstract: A flow through pressure regulator apparatus and method for directing a flow of fuel and reducing valve seat wear within a fuel system. Present invention includes a lower housing having fuel inlet where fuel flows through the fuel inlet and communicates with a valve assembly and valve biasing member. The valve assembly comprises a lower and upper valve member where the lower valve element contains a plurality of fuel passages. The valve biasing member permits or inhibits fuel flow through the lower valve member by opening and closing an upper valve member. The valve biasing member comprises a flat disk having at least two reticulated concentric rings coupled by at least one bridge. The fuel flows past an open upper valve member through the plurality of fuel passages that encircle the lower valve member to the valve biasing member. The valve biasing member then diffuses the flow of fuel. A fuel cover directs the flow of fuel from the valve biasing member to the fuel outlet.

Abstract: A valve has a valve body that defines a chamber. The chamber has an inlet and an outlet through which a flow path passes. A seat is positioned within the chamber and surrounds the flow path. A closing member is positioned within the chamber and a biasing member biases the closing member into an open position away from the seat. The biasing member exerts a biasing force on the closing member which exceeds the force exerted on the closing member by a first fluid which enters the inlet and flows past the closing member and through the open valve. The biasing force is less than the force exerted by a second fluid having one or more different characteristics from the first fluid. Force exerted by the second fluid on the closing member overcomes the biasing force and moves the closing member into engagement with the seat, closing the valve.

Abstract: A system for quickly removing and installing check valve parts without disturbing system piping attached to a pump. The system includes a first adapter attached to the outlet of the pump head. The first adapter includes a valve seat and a housing with a side wall having external threads. A second adapter includes a hollow body with a space for a check valve. The body has an opening in the side wall for inserting the check valve. The second adapter fits over the first adapter and the adapters are attached by means of a collar. Tightening the collar onto the threads on the first adapter causes the check valve to be held firmly between the valve seat and the top wall of the second adapter.

Abstract: A high-pressure pump for feeding fuel to an internal combustion engine has a pump housing; a fuel delivery duct; and a check valve, which is arranged along the delivery duct, and comprises a fuel chamber; a valve member mobile within the fuel chamber; and a biasing and guiding assembly, which has a fastening member suitable for being fastened to the pump housing and sealing the fuel chamber in a fluid-tight manner; a helical spring suitable for biasing the valve member; and a bushing arranged about the helical spring in order to prevent bending of the helical spring.

Abstract: In a check valve having a spherical valve body received in a valve chamber, a valve seat for blocking the flow of fluid from the valve chamber toward an inflow port when having the spherical valve body seated thereon, and a plate-like resilient member arranged across the valve chamber. The resilient member has an annular fixed portion fixed on a circumferential wall of the valve chamber and a tongue piece portion radially extending from a radial one side of the annular fixed portion to extend an end thereof beyond an inner edge on a radial other side of the annular fixed portion. The tongue piece portion is formed to be deflected toward the valve seat side from the fixed portion and is resiliently contacted with the spherical valve body at a center part thereof for disengageably pressing the spherical valve body against the valve seat.

Abstract: A flow through pressure regulator apparatus and method for directing a flow of fuel within a fuel system. Present invention includes a lower housing having a fuel inlet where fuel flows through the fuel inlet and communicates with a valve biasing member through a fuel chamber and lower valve element with fuel passages. The valve biasing member permits or inhibits fuel flow through a fuel chamber by opening and closing a ceramic valve element. The valve biasing member comprises a flat disk having at least two reticulated concentric rings coupled by at least one bridge. The fuel flows past an open valve element through the lower valve element fuel passages to the valve biasing member. The valve biasing member then diffuses the flow of fuel. A fuel cover directs the flow of fuel from the valve biasing member to the fuel outlet.

Abstract: A combination check valve and relief valve has a valve body with an inlet, an outlet, and a valve chamber operatively interposed between the inlet and outlet. A check valve may be integrated with the relief valve and therefore simplify a hydraulic system. The valve includes a relief valve member which is within the valve chamber. The valve also includes a resilient member with a first end and a second end. The first end of the resilient member operatively engages the relief valve member. The valve includes a setting member pressure-fit within the valve chamber to operatively engage the second end of the resilient member. The resilient member is resiliently biased between the setting member and the relief valve member to bias the relief valve member against a relief valve seat, whereby, when pressurized fluid communicates with the inlet, the resilient member is compressed, and the relief valve member disengages its seat to enable the fluid to pass through to the outlet.

Abstract: A valve having a valve member, which cooperates with a valve seat formed in a housing part in order to control a connection, and the valve seat has an at least approximately conical seat face, which is located at a transition of the connection from a portion of small diameter to a portion of large diameter. The seat face is adjoined, on its side oriented toward the portion of large diameter, by at least one face which is more markedly inclined relative to the longitudinal axis of the connection than the seat face, and on its side oriented toward the portion of small diameter, the seat face is adjoined by at least one face which is less markedly inclined relative to the longitudinal axis of the connection than the seat face.

Abstract: A radial piston pump has a pump housing containing pump elements and whose high-pressure conduits extending in the pump housing are embodied so as to significantly increase the permissible operating pressures.

Abstract: A pressure control valve has a non-uniformly tapered valve bore that has an increasing diameter as it extends downstream. An interface angle, defined in part between a valve ball and the valve bore in the area of the smallest gap between them, increases as the valve ball is increasingly displaced away from a valve seat of the valve bore.

Abstract: A fluid jet for providing fluid under pressure to a desired location is disclosed wherein the valve body includes and integral valve element retaining region. Preferably, the valve body and integral valve element retaining region are die cast as a one-piece component. More specifically, the fluid jet includes a die cast one-piece valve body having a valve element retaining region extending longitudinally within at least a portion of the valve body, at least one fluid passage extending longitudinally within at least a portion of the valve body and in fluid communication with at least a portion of the valve element retaining region, and at least one fluid-exiting aperture through the valve body in fluid communication with the at least one fluid passage.

Abstract: An occlusion valve with safety relief comprising a manifold block having an inlet and an outlet. A diaphragm connected to the manifold block and for being manually pressed to stop flow between the inlet and the outlet. A pressure relief valve internal to the manifold block and in fluid communication with downstream and upstream pressures and wherein when the diaphragm is pressed and downstream pressure exceeds a predetermined pressure the pressure relief valve opens allowing flow through the occlusion valve with safety relief.

Abstract: A ball valve is provided for threaded connection to a separable component 72 having male threads 74. A housing 10 contains a ball 12 selectively rotatable for passing fluid through the housing, and a flange member 20 threadably secured to the valve housing. A stop ring 16 is positioned outward of the valve housing and engages the flange member. A coupling 20 is threadably secured to the stop ring and includes female threads for engagement with male threads on the separable component.

Abstract: Pressure actuated oil jets have long been used to cool the underside of the pistons in such reciprocating engines. The present disclosure is a fluid jet for providing fluid under pressure to a desired location. The fluid jet comprises a valve body, at least one fluid passage extending longitudinally within at least a portion of the valve body, a fluid pressure actuated valve element located within the valve body and moveable longitudinally therein between a valve open position and a valve closed position, and a sleeve extending inwardly within said valve body, wherein said valve element is retained within said sleeve when oil pressure drops below a predetermined threshold.

Abstract: A pump apparatus for transporting at least one fluid, comprising a shaft, wherein the shaft has a longitudinal axis; a motor, wherein the motor is adapted to rotate the shaft about the longitudinal axis; and, a plurality of gerotors, wherein the gerotors are attached to the shaft along the longitudinal axis and wherein the shaft rotation actuates the plurality of gerotors rotation, causing pumping of the at least one fluid.

Abstract: A flow control valve for use in oxygen systems. The flow control valve has a body within an inlet and an outlet. A seat is located within the body and a ball retainer is located within the body. The ball retainer is able to capture a ball. The flow control valve also has biasing means connected to the ball retainer. Furthermore, the biasing means is movable between a flow and a non-flow position. The ball retainer is in a closed position when the ball, captured by the ball retainer, engages the seat to prevent gas flowing through the seat.

Abstract: A small engine fuel system includes a vent valve configured to be disposed within a tank having at least a portion of a filler pipe defined therein. The filler pipe includes an upper portion configured to receive a fluid and a lower portion located at a predetermined depth in the tank, where the predetermined depth defines a liquid fill level of the tank. The small engine fuel system further includes spring valve arranged in series with the vent valve. The spring valve is configured to close during a refilling event, thereby substantially preventing overfill of the tank with the fluid.

Abstract: A pressure responsive regulator valve particularly suitable for a vehicle fuel system includes a substantially monolithic T-shaped body having a first bore defining a substantially unrestricted fluid flow path therethrough and a second bore in fluid flow communication with the first bore. A pressure responsive valve is provided in the second bore to open and close a fluid flow path through the second bore.

Abstract: Disclosed are a valve sealant fitting and a method of manufacturing the same, which not only allows a sealant to be rapidly and easily injected but also prevents a leakage, which result in a more facilitated manufacturing process with reduced costs and a superior mechanical quality. In particular, the sealant fitting includes: a spring coupling unit 150 having an internal screw thread 140 for coupling unit assembly below the ball installation groove 103 of the sealant body 100, the internal screw thread 140 having a hexagonal groove 151 for preventing a downward separation of the coil spring 130, allowing a fluid to flow and facilitating fastening and releasing of the screw, and having an external screw thread 152 at an outer circumference of the spring coupling unit; and outer sealing O-rings 160 and 160-1 disposed in O-ring installation grooves 161 formed on respective upper and lower positions of the valve coupling taper screw part 101-1 formed on the outer lower side of the sealant body 100.

Abstract: Vibration damper with a damping medium-filled cylinder, in which a piston rod is installed with freedom of axial movement, and a pressure container, which is connected to the vibration damper by an adapter piece. The adapter piece comprises a connecting part, which is connected to the pressure container, and an upper part, which is connected permanently to the vibration damper. A filling channel inside the adapter piece is open at both ends when the pressure container is full, and a filling channel on the vibration damper side, which is connected to the filling channel of the adapter piece, has a closing element.

Abstract: A ball valve (10) is disclosed with an orifice (58) to control the flow of fluids in which the downstream seal (52) is never directly exposed to erosive wear from the fluid flow. The orifice (58) is only open in a limited range of the ball (42) rotation. Upon rotation of the ball (42) from the full closed position, the orifice starts to open on the outlet side (62) first and after the outlet orifice is fully open the orifice opens to the inlet side (60). The size of the opening on the inlet side (60) can be adjusted to control the flow rate of fluid through the orifice (58) in the ball (42). When closing the valve, the inlet side closes first and then the outlet side. The orifice (58) of the ball (42) thus passes the outlet seal (52) under no-flow conditions, and gross erosion of the outlet seal can be avoided.

Abstract: A fluid jet for providing fluid under pressure to a desired location is disclosed wherein the valve body includes and integral valve element retaining region. Preferably, the valve body and integral valve element retaining region are die cast as a one-piece component. More specifically, the fluid jet includes a die cast one-piece valve body having a valve element retaining region extending longitudinally within at least a portion of the valve body, at least one fluid passage extending longitudinally within at least a portion of the valve body and in fluid communication with at least a portion of the valve element retaining region, and at least one fluid-exiting aperture through the valve body in fluid communication with the at least one fluid passage.

Abstract: A ball check valve for use in a hydraulic chain tensioner. The ball check valve contains a check ball, a ball seat having a passage for the flow of hydraulic fluid, a coil spring to urge the check ball toward the ball seat and a retainer to house these components. The retainer has at least two peripheral walls along its longitudinal axis, each of which is either substantially planar or slightly convex so that the check ball contacts a single point on each peripheral wall as it travels between full compression of the coil spring and secure abutment with the ball seat. The gaps or openings between the peripheral walls minimize turbulence in the flow of hydraulic fluid.

Abstract: An improved hydraulic lash adjuster including a cup-shaped adjuster body, and a plunger assembly disposed within the adjuster body. The plunger assembly includes a stepped axial bore extending from a body inner end to a central oil passage opening onto a hemispherical pivot head. A check valve cartridge sub-assembly is disposed against the step, defining a low-pressure oil chamber in the axial bore. A lash adjustment spring is disposed against the cartridge sub-assembly in a high-pressure chamber formed between the sub-assembly and the adjuster body. The cartridge sub-assembly may be used in other hydraulic lash adjusters such as are incorporated in hydraulic valve lifters.

Abstract: Pressure actuated oil jets have long been used to cool the underside of the pistons in such reciprocating engines. The present disclosure is a fluid jet for providing fluid under pressure to a desired location. The fluid jet comprises a valve body, at least one fluid passage extending longitudinally within at least a portion of the valve body, a fluid pressure actuated valve element located within the valve body and moveable longitudinally therein between a valve open position and a valve closed position, and a sleeve extending inwardly within said valve body, wherein said valve element is retained within said sleeve when oil pressure drops below a predetermined threshold.

Abstract: Disclosed is a check valve (5) that is screwed into a threaded bore (1) of a housing (2) of a hydraulic subassembly between a first pressure side (26) and a second pressure side (27) by means of an external thread (11) which is disposed in a first cylinder section (8) of a cylindrical valve housing (6) of the check valve (5). A passage duct (39) which allows a hydraulic fluid to flow between the sidewall of the threaded bore (1) and a first removed portion (16) of the surface area (10) of the cylindrical valve housing (6) is embodied in at least one angular segment (a1, a2, and a3) of the valve housing (6).

Abstract: The invention relates to a method of setting the ball travel of a valve-closing body, designed as valve ball, of a control valve of a hydraulic valve-lash-adjusting element which has a plunger with a plunger head and a central bore, a valve seat being provided at the outer end of this central bore, this valve seat being controlled by a valve ball, the ball travel of which is limited by a valve cap which has a cap flange and a cap base, the cap flange resting with its bearing surface on a base of a recess of the plunger head, and a stop of the cap base serving as a travel limit for the valve ball.

Abstract: To prevent explosion of an air tank in a vehicle collision, an apparatus includes a case defining a passage, configured for air stored in the air tank to be exhausted therethrough, the case being mounted to the air tank; a stopper movably disposed in the case and configured to selectively intercept the air based on a position thereof; an elastic member supporting the stopper; and at least one hook configured to secure the stopper in a position at which the air is exhausted.

Abstract: A pump including a main body having a piston provided in a portion of the main body, the piston being configured to reciprocate linearly. A piston spring may be provided within the main body and configured to bias the piston toward an end of the main body. Further, a plurality of intake check valves may be positioned radially within the main body and configured to move in a direction generally perpendicular to the linearly reciprocating direction of the piston such that brake fluid is introduced into the main body. Additionally, the pump may include an exhaust check valve configured to exhaust brake fluid from an inside of the main body to an exterior of the main body by moving an exhaust check ball in the linearly reciprocating direction of the piston.

Abstract: An air fitting with an integral check valve includes a housing having an inlet and at least one outlet, a passage extending between the inlet and the at least one outlet with a valve seat being formed in the passage adjacent the at least one outlet with a portion between the outlet and the valve having a plurality of channels separated by lands which form a guide surface for the valve as it is being forced onto the valve seat by a spring. The channels allow passage of air around the valve member with less restriction when the valve member is lifted off the valve seat.

Abstract: Apparatus and methods for constructing a valve comprising a sealing member and a hollow ball operable to sealingly engage the sealing member. A guide housing disposed about said hollow ball and does not constrain rotation of said hollow ball. A spring is disposed between the hollow ball and the guide housing so as to bias the hollow ball into sealing engagement with the sealing member. The hollow ball is constructed from two unequal sized portions and may comprise a hollow, spherical body having an aperture and a plug sized so as to closely fit within the aperture.

Abstract: A rotary compressor having a housing, a rotor positioned within the housing defining a compression chamber, the rotor rotatable about an axis of rotation, a discharge port in the rotor in fluid communication with the compression chamber, and a valve assembly mounted to the rotor to regulate the pressure of the fluid within the compression chamber. In one embodiment, the valve assembly is canted or obliquely aligned with respect to the axis of rotation of the rotor and a radial axis perpendicular to and intersecting the axis of rotation. Aligning the valve assembly in this way allows the displacement of the valve head of the valve assembly to be substantially collinear with forces acting on the valve head.