Abstract: An evaporated fuel treatment device is provided with an electric-operated valve, a positive-pressure relief valve mechanism and a negative-pressure relief valve mechanism. The electric-operated valve has a valve body for opening/closing a vapor passage allowing a fuel tank and a canister, and adjusts the flow rate by electrical control. The positive-pressure relief valve mechanism opens when the pressure at the fuel tank side has a value greater than or equal to a predetermined positive pressure value. The negative-pressure relief valve mechanism opens when the pressure at the fuel tank side has a value less than or equal to a predetermined negative pressure value. The electric-operated valve is configured such that the valve body is moved in the valve opening direction by the pressure at the fuel tank side that is higher, by a predetermined value, than the valve opening pressure for the positive-pressure relief valve mechanism.

Abstract: A pressure limiting valve (1), operationally arranged between a high pressure zone and low pressure zone (HP, LP) of a hydraulic circuit, comprises: a valve body (4) defining a passage (11) for a fluid; a closing member (8) having a stem (10) and a closing head (9) connected thereto and movably engaged with the valve body (4) so as to move along a longitudinal or axial direction (X) between positions (P1, P2) for closing and opening the passage (11), in an opening direction (OD) and closing direction (CD), respectively; a sleeve (12) which is joined to the stem (10); a spring (S1) arranged between the sleeve (12) and the valve body (4) so as to exert a force on the closing member (8) along said longitudinal or axial direction (X), in the closing direction (CD); said sleeve (12) is irreversibly locked to the stem (10) by means of a threadless mechanical connection, in a predefined longitudinal or axial position of the said stem (10), so that the spring (S1) exerts a force of predefined value on the closing mem

Abstract: A flow control valve including a passage, and first and second valve devices disposed in the passage and comprising first and second valve members, valve seats, and seal members, respectively. Each valve member is movable for opening and closing the passage. Each seal member may seal between the corresponding valve member and seat. The first valve member moves in a first direction toward a closing position of the first valve device. The second valve member moves in a second direction, opposite the first closing direction, toward a closing position of the second valve device. The first or the second seal member may include a base portion attached to one of the corresponding valve member and the corresponding valve seat, a lip extending from the base portion, and a turning-up inhibiting device configured to inhibit the lip from turning up when the corresponding valve member is in the closing position.

Abstract: A heat recovery device such as an EGHR device includes a bypass valve, a gas/liquid heat exchanger and a flow duct. The flow duct has an open top and an open bottom. A top surface of the duct seals to a surface surrounding an opening of a gas flow conduit, such as an exhaust pipe. A duct wall extends from the top surface to the bottom surface, to which the heat exchanger is secured. The flow duct provides a passage through gas flows between the gas flow conduit and the heat exchanger. The bypass valve is mounted in the flow duct and is movable between a bypass position and a heat exchange position. The bypass valve may be mounted adjacent to the top or bottom of the duct, and may be a butterfly-type valve, a one-sided flap valve, or a pair of one-sided flap valves.

Abstract: An injection valve assembly for use in a well, where pressurized gas or fluid from uphole in the well displaces a perforated valve head from a valve seat, allows for fluid flow of the pressurized gas or fluid into the valve head and further downhole in the well toward an electric submersible pump. A compression spring is coiled around a valve stem connected to the valve head, pushing the valve stem and valve head in an uphole direction opposite to the force from pressurized gas or fluid. The compression spring is in a chamber filled with hydraulic fluid, where the hydraulic fluid can pass through a dampening system assembly and a flow restrictor assembly, thereby regulating the speed at which the valve stem and valve head can move relative to the valve seat.

Abstract: Embodiments of the present disclosure are directed toward a pressure vacuum relief valve and a seal assembly of the pressure vacuum relief valve. The seal assembly includes a ribbed substrate disposed against a flanged seat of the pressure vacuum relief valve. The ribbed substrate includes ribs extending from a base of the ribbed substrate. The seal assembly also includes a pallet coupled to and disposed below the ribbed substrate. The pallet includes a top ring, a bottom ring, and a flexible diaphragm captured between the top ring and the bottom ring. The flexible diaphragm of the pallet is configured to seal against the ribbed substrate in a sealed position. The pallet and ribbed substrate are configured to move together away from the flanged seat when a pressure on a sealed side of the pressure vacuum relief valve exceeds a maximum pressure threshold.

Abstract: An adjustable damping valve arrangement comprises an adjustable damping valve in which flow is bidirectional, wherein a pressure-dependent supplementary valve is associated with the adjustable damping valve in series therewith for each through-flow direction, wherein each supplementary valve has at least one separate through-channel, the outlet side thereof being at least partially covered by at least one valve disk, wherein the flow path proceeding from the adjustable damping valve in flow direction is carried out through the first supplementary valve from a smaller inlet diameter to a larger outlet diameter, and the at least one valve disk carries out a peripheral lift movement, wherein the flow path through the second supplementary valve in flow direction to the adjustable damping valve is implemented from a larger inlet diameter to a smaller outlet diameter.

Abstract: A high-pressure fuel pump for an internal combustion engine. The high-pressure fuel pump includes an improved configuration that beneficially simplifies certain features of the high-pressure fuel pump. The fuel pump possesses an inlet check valve positioned along an inlet fuel circuit and an outlet fuel circuit of the high-pressure pump that provides a path for a low-pressure inlet fuel flow to and a path for a high-pressure output fuel flow from a pumping chamber of the fuel pump. Because of the configuration of the inlet check valve and the outlet check valve, the complexity of high-pressure fuel pump is beneficially reduced, decreasing the cost of components and assembly and improving the life and reliability of high-pressure fuel pump.

Abstract: A relief valve assembly includes a relief valve, a hollow shell disposed on the relief valve so as to form a relieving chamber, and a cap mounted to the hollow shell and closing off a distal end of the relief valve to an external environment. The hollow shell has a distal aperture and a proximal aperture, and the distal end of the relief valve is inserted into the hollow shell through the proximal aperture and protrudes through the distal aperture. The relief valve includes a relief port forming a fluid flow path between a valve chamber of the relief valve and the relieving chamber, and the hollow shell extends past the relief port along a longitudinal axis of the relief valve. The relief valve includes a slide member configured to move in response to an over-pressure condition, and a fluid vents from the valve chamber to the relieving chamber through the relief port.

Abstract: A brake system and a valve device for a brake system are provided which provide at least partial front brake actuation in the event of a failure in the front brake pneumatic supply circuit. The valve device may be configured as a biased orifice double check valve which permits compressed air flow from the front brake pneumatic supply circuit to a front brake actuator during normal brake operation, but in the event of lack of sufficient front brake pneumatic pressure permits compressed air to be supplied to the front brake actuator from a rear brake pneumatic supply circuit, as well as permitting compressed air in the front brake actuator to be ventilated back through the rear brake pneumatic supply circuit when the brake is released.

Abstract: A check valve includes a casing including a positive pressure valve seat, a positive pressure valve urged by a positive pressure valve spring and including a negative pressure valve seat, and a negative pressure valve assembled to the positive pressure valve and urged by a negative pressure valve spring, where the positive pressure valve includes an inner cylinder, an outer cylinder that is connected with an outer circumference of the inner cylinder via ribs, and passages formed between the inner cylinder and the outer cylinder, where the positive pressure valve spring is disposed the casing and the outer cylinder, and where the negative pressure valve spring is disposed in the inner cylinder.

Abstract: A pressure relief valve assembly includes a housing, a diaphragm assembly separating the housing into a sensing pressure section and a tank pressure section, the sensing pressure section configured to sense both atmospheric pressure and the pressure in the tank pressure section and the tank pressure section is configured to only sense the pressure in the tank pressure section, an orifice disposed between the sensing pressure section and the tank pressure section allowing fluid to flow in through the orifice when the pressure in the sensing pressure section is less than the pressure in the tank pressure section fluid to flow out through the orifice when the pressure in the sensing pressure section is greater than the pressure in the tank pressure section.

Abstract: A ventilation arrangement for the head space of the fuel tank of a vehicle consists of a valve assembly received in a housing (30), which assembly is arranged to produce a maximum pressure, which is not to be exceeded, a minimum pressure below which the pressure must not fall, and a random pressure, for example, for the tank filling process, within the head space. For this purpose a valve which is biased by a spring (25) in the direction towards an atmospheric connector (6) and is characterised by a sealing plate (17), and a valve biased by a spring (19) in the direction towards a connector (5) intended for connection to the head space, and a valve characterised by a sealing head (24) are provided, the latter of which is simultaneously connected to an electromagnetic drive in order to produce the random pressure.

Abstract: A valve for enabling communication between a first pressure and a second pressure including a piston member arranged in a housing. The piston member is movable between an open configuration and a closed configuration for selectively enabling communication between the first and second pressures. A control assembly is included for moving the valve to the open configuration. A first net pressure area is exposed to the first pressure and operatively arranged to urge the valve in a closing direction in response to the first pressure when the valve is in a closed configuration. A second net pressure area is exposed to the second pressure and operatively arranged to urge the valve in the closing direction in response to the second pressure when the valve is in a closed configuration. A method of operating a valve system is also included.

Abstract: A valve includes a housing configured to interengage with a container, a first and second poppets axially movable between open and closed positions, a first seal between the first poppet and the housing, a second seal between the first poppet and the second poppet, and first and second resilient members disposed within the housing and urging the first and second poppets toward the closed position.

Abstract: A valve for limiting the tank pressure in a motor vehicle, comprising a first line (1) and a second line (2) which may establish a flow connection in which at least one body (3, 4) may be moved relative to another body (4, 3), whereby the movable body (3, 4) lifts up from a sealing seat (5), with regard to the object of adjusting the tank pressure using a compact design is characterized in that a first body (3), a second body (4), and the sealing seat (5) as a whole form a movable unit (6).

Abstract: A valve apparatus is disclosed for use in regulating the flow of fluid between a closed hydraulic loop and a fluid source in a hydraulic circuit, where the valve apparatus provides up to four different functions including a check valve, a neutral valve, a relief valve and a pressure rise rate valve. The apparatus includes a valve seat for selectively permitting fluid communication between the closed hydraulic loop and the fluid source, a sleeve member and a relief poppet in the valve seat, a relief compression spring inside the sleeve and positioned adjacent the relief poppet and the base of the slidable member, a valve guide and an accumulator piston slidably mounted within the valve guide to define an accumulator volume therein.

Abstract: A combination or hybrid pressure relief and topping valve for use with inflatable devices such as life rafts and escape slides. The valve including a valve body with a fluid passage therein that includes an internal shoulder. The valve further includes a first poppet with a seal seated therein where the first poppet is biased against the shoulder by a first spring. The first poppet and seal further having an aperture therein. The valve also includes a second poppet biased into the aperture by a second spring. The combination of poppets, springs and the seal provide for a neutral mode where the valve is sealed, a topping mode where fluid is allowed to pass through the valve and into an inflatable device sealed to one end of the valve, and a pressure relief mode where fluid is released from the inflatable device to the atmosphere when overpressure within the inflatable device exists.

Abstract: A suspension system that includes a simplified lockout mechanism and an adjustable blow-off mechanism. The system includes a valve mechanism and a valve actuating assembly, a valve mechanism housing and a resilient member disposed between the valve mechanism and the valve mechanism housing. The valve mechanism is slidably mounted along the valve mechanism housing and it separates a first chamber from a second chamber. The valve actuating assembly operates the valve mechanism between open and closed positions. The resilient member is configured to be deformable by the valve mechanism as the valve mechanism is slidably displaced by an increasing pressure in the first fluid chamber. The sliding valve mechanism is configured to collide against the valve actuating assembly when a blow-off pressure is reached in the first fluid chamber switching the valve mechanism from the closed position to the open position.

Abstract: A combination valve for fuel delivery system of a vehicle having an engine, the fuel delivery system being configured to pump fuel to the engine and the fuel delivery system has a regulator for regulating the pressure of the fuel when it is being pumped to the engine by the fuel delivery system, the combination valve comprising: an outer housing defining an inner opening for slidably receiving a body portion of a system pressure relief valve therein, the body portion of the system pressure relief valve defining an inner opening for slidably receiving a body portion of a check valve therein, the body portion of the check valve being configured to provide a first fluid pathway in a first direction when the body portion of the check valve moves from a closed position to an open position as the body portion of the check valve moves in the first direction within the inner opening of the body portion of the system pressure relief valve, the body portion of the system pressure relief valve being configured to provid

Abstract: In an apparatus for regulating the internal pressure of a closed system, a valve housing connected to a closed system, an intake valve connected to a valve housing for receiving a pressurized substance in one direction through the valve housing into the closed system, and a release valve connected to the valve housing for releasing excess pressure from the closed system. The release valve has a release valve aperture for releasing pressurized substance, a release valve block for selectively preventing the pressurized substance from escaping through the release valve aperture, and a release valve spring for retaining the release valve block in a closed position. When the constant internal pressure is increased, the release valve spring causes the release valve block to move from the closed position to an open position, thereby allowing excess pressurized substance to escape from the release valve aperture.

Abstract: A decoupled check-relief valve for use in a hydraulic fluid circuit is provided that has a cylindrical guide housing which travels during the check function of the valve. The cylindrical guide housing has a clearance parameter, allowing for the selection of an optimal check response time. A dampening disk is provided inside the cylindrical guide housing, traveling within the guide during the relief function of the valve. The dampening disk has a separate clearance parameter, allowing for the selection of an optimal dampening capacity and fluid circuit stability. As such, the check and relief clearance parameters are independent of each other to allow both the check and relief functions of the valve to be optimized.

Abstract: A hydraulic valve system (1) has a supply connection arrangement, having a high-pressure connection (P) and a low-pressure connection (T), a working connection arrangement, having two working connections (A, B), which can be connected with a hydraulic motor (2), and a directional valve (4) between the supply connection arrangement (P, T) and the working connection arrangement (A, B), which is connected with the working connection arrangement (A, B) via working lines (17, 18), in which are arranged check valves (21, 22), which can be opened by means of pressure.

Abstract: Pressure management apparatus are provided herein for coupling to an end of a vent pipe of a storage tank. Exemplary pressure management apparatus include a removable filter adapted to minimize and/or prevent debris from traveling from an interior of a storage tank to an interior of a housing of the pressure management apparatus. Further exemplary pressure management apparatus include a pressure valve with a high pressure valve portion and a low pressure valve portion. Methods of providing a pressure management apparatus are also disclosed.

Abstract: A pressure relief valve that includes a sealing arrangement with a cantilevered seal that prevents fluid from escaping from a system if the differential pressure is only slightly positive yet permits fluid to be released from the system if the internal system pressure exceeds a predetermined pressure differential. In a further embodiment, the pressure relief valve includes a further scaling arrangement with a further cantilevered seal, which is normally closed, but if the internal system pressure should decrease below the external pressure a predetermined amount the second scaling arrangement opens to allow fluid into the system to thereby equalize the pressure and thereby prevent collapse of the system.

Abstract: The implement linkage of a work machine comprises at least one oil dilled pin joint. During operation of the linkage, pressure can build up in the pin joint, thus causing damage to the pin joint. It is desirable to vent this pressure without allowing oil to escape from the pin joint. It is also desirable to measure the level of the oil in the pin joint. A combination relief vent and dipstick apparatus which allows both these tasks to be accomplished with one apparatus is disclosed herein.

Abstract: The pressure control valve is structured such that a first port is formed on one side of a casing, a second port is formed on the other side, and, in the casing, there are disposed not only a positive pressure valve which, when the pressure on the first port side becomes high, can be moved to the second port side to thereby communicate with the second port side, but also a negative pressure valve which, when the pressure on the first port side becomes low, can be moved to the first port side to thereby communicate with the second port side. In the pressure control valve, there is provided flow passage expanding means which, which the positive pressure valve has moved to the second port side beyond a given distance, allows the first port side to communicate with the second port side.

Abstract: A decouple check-relief valve for use in a hydraulic fluid circuit is provided that has a cylinder guide housing which travels during the check function of the valve. The cylindrical guide housing has a clearance parameter, allowing for the selection of an optimal check response time. A dampening disk is provided inside the cylindrical guide housing, traveling within the guide during the relief function of the valve. The dampening disk has a separate clearance parameter, allowing for the selection of an optimal dampening capacity and fluid circuit stability. As such, the check and relief clearance parameters are independent of each other to allow both the check and relief functions of the valve to be optimized.