Abstract: A closing element is for a valve assembly of a compressor unloader, the compressor including a casing with a compression chamber, the unloader including a housing defining a chamber. The valve assembly has a base between the compression and unloader chambers, a passage connecting the two chambers, a seat about the passage, and a stem bore within the base having a control chamber. The closing element includes a main body movably disposed within the stem bore and having a sealing surface disposeable against the valve seating surface to obstruct the valve passage and a control end surface within the bore control chamber A sealing member disposed about the main body prevents flow between the control chamber and the valve passage. The main body and/or the sealing member is configured such that the main body is radially moveable to align the body sealing surface with the valve seat.

Abstract: The invention relates to a hydraulic valve arrangement which is used, in particular, for a mobile machine and which has a valve housing (10) having a feed channel (34), having an outlet channel (42) and having a consumer channel (39) and has a valve bore (11) which cuts into the channels. In the valve bore (11), a valve slide (12) can be moved axially from a neutral position in at least one direction into a working position, by way of which valve slide (12) the fluidic connections between the channels can be controlled. Moreover, there is a pressure-relief and feed valve (45, 47), by way of which the pressure in the consumer channel (39) can be limited by throttled discharge of pressure fluid into the outlet channel (42) and pressure fluid can be fed from the outlet channel (42) into the consumer channel (39). The invention is based on the object of designing a hydraulic valve arrangement of this type in such a way that low manufacturing costs and a small overall size are possible.

Abstract: An offshore hydrocarbon transfer system (10) wherein a conduit (24) connects a floating structure (12) to a second structure (22) to carry hydrocarbons between them, and one of the structures has a shutoff valve (30) that produces a pressure surge in the conduit if the shut-off valve closes too fast. The invention provides a surge protection apparatus (40) with an overflow container (50) that receives hydrocarbons in the event of a pressure surge. The overflow container lies adjacent to the conduit and is connected to the conduit by a pressure relief valve (60). In one apparatus (40), the overflow container lies coaxial with a relief conduit section (42), and includes an elastic outer wall (44) that surrounds the conduit section. In another apparatus, the overflow container (72) lies completely outside the conduit section (42), and can be removed after it has filled with hydrocarbons.

Abstract: A flow prioritizing system includes a regulating valve and a flow prioritizing valve. The regulating valve receives a first portion of the fluid supplied from a fuel supply pump, and is responsive to a control pressure to selectively allow or prohibit flow to secondary loads. The flow prioritizing control valve is responsive to fluid pressure representative of delivery pump discharge pressure to control the control pressure to which the regulating valve is responsive.

Abstract: Controlling fluid regulation may provide increased efficiency and reliability. In one general aspect, a system and process for fluid regulation may include the ability to receive a command signal, generate a control signal based on the command signal, and move a magnetizable element relative to a wire coil in accordance with the control signal, the movement affecting a pressure in a pressure cavity. The system and process may also include the ability to sense the pressure in the pressure cavity due to the position of the magnetizable element and adjust the control signal based on the sensed pressure and the command signal. The system and process may further include the ability to sense a second parameter of the fluid regulation system and adjust the command signal based on the second parameter.

Abstract: A flow rate switching type flow divider for distributing fluid from a pump to a priority flow circuit and a surplus flow circuit. A flow divider valve arranged along a first line includes a first restriction to restrict flow rate of the fluid from the supply flow path to the priority flow path. A switch valve is arranged along a second line that differs from the first line so as to communicate with the supply flow path through the flow divider valve at a location upstream from the first restriction. The switch valve switches an opening amount of a connection flow path that bypasses the first restriction and extends from the supply flow path to the priority flow path. The switch valve includes a second restriction arranged in the switch valve for restricting flow rate of fluid flowing through the connection flow path.

Abstract: A vehicular hydraulic system with a pump and first and second hydraulic applications arranged in series. A valve is disposed whereby fluid from the pump flows through an inlet port, primary flow channel and outlet port of the valve to the first hydraulic application. The valve includes a body and a valve member that axially slides within an elongate valve chamber, partitioning the primary flow channel from a low pressure volume. The valve also includes a low pressure port and a bypass port. The bypass port is sealed from fluid communication with the valve chamber in a first position and is in fluid communication with the primary flow channel when the valve member is biased into a second position by a threshold exceeding elevated fluid pressure in the primary flow channel. Fluid discharged from the bypass port is diverted past the first application to the second application.

Abstract: A vehicular hydraulic system having a hydraulic pump and first and second hydraulic applications arranged in series. A dual relief valve defines first and second flow channels, a passageway and a bypass port. The first flow channel is disposed between the hydraulic pump and the first hydraulic application and the second flow channel is disposed between the first hydraulic application and the second hydraulic application. A first valve member controls fluid flow through the passageway and allows fluid flow from the first to the second flow channel through the passageway when fluid pressure within the first flow channel exceeds a first threshold pressure. A second valve member controls fluid flow through the bypass port and allows fluid flow from the second flow channel to a return line through the bypass port when fluid pressure within the second flow channel exceeds a second threshold pressure.

Abstract: A vehicular hydraulic system having a pump, first application, pressure-dump valve and second application arranged in series. The pressure-dump valve diverts a portion of the primary fluid flow past the second application when the pressure exceeds a threshold value. A valve member in the pressure-dump valve defines a pressure-reducing orifice that communicates fluid across the valve member. A check valve prevents flow through the pressure-reducing orifice when the pressure in the valve is below the threshold value. When the pressure exceeds the threshold value, fluid flows through check valve and the pressure reducing orifice resulting in the movement of the valve member and exposure of a bypass port thereby diverting a portion of the primary fluid flow past the second application. The check valve may be selectively variable to provide for the adjustment of the threshold value. A priority valve may also be provided upstream of the first application.

Abstract: A vehicular hydraulic system with a pump and first and second hydraulic applications arranged in series. The fluid upstream of the first application may be elevated to a first threshold pressure value. A pressure-dump valve is disposed downstream of the first application and fluid entering the valve flows through an inlet port, primary flow channel and outlet port of the valve to the second hydraulic application. The valve includes a valve member that axially slides within an elongate valve chamber, partitioning the primary flow channel from a low pressure volume. The valve also includes a low pressure port and a bypass port that diverts fluid past the second application. The valve member is biased into a position wherein fluid is diverted through the bypass port when the pressure in the primary flow channel exceeds a second threshold value. The first threshold value is greater than the second threshold value.

Abstract: A quick closing shut-off valve includes an inlet, an outlet and a passage there between. A closing element blocks the passage when in the closed position. The closing element is interconnected to a piston via a pull rod. The piston is positioned within a working chamber that communicates with the valve outlet. A safety valve also communicates with the working chamber and is positioned above the piston. As a result, when the pressure within the tank, and thus in the working chamber, reaches a maximum permissible pressure, the safety valve opens and the pressure above the piston decreases. The piston rises as a result and pulls the closing element via the pull rod into the closed position so that the valve is closed.

Abstract: A pressure regulating valve which is comprised of a valve body being comprised of a cylinder, a spool slidably disposed in the cylinder with a clearance, the spool and the cylinder defining a pressure chamber and a space portion, and an urging member which urges the spool in a direction opposite to a direction of a force applied to the spool by fluid pressure in the pressure chamber. A supply passage fluidly communicates the cylinder and a fluid pressure supply source, and a drain passage fluidly communicates the cylinder and a sump. A through-passage formed in the spool fluidly communicates the pressure chamber and the space portion. An orifice disposed between the space portion and a sump limits a flow rate of fluid drained from the space portion to the sump. The spool is made of material having a lower thermal expansion coefficient than material of the valve body.

Abstract: A continuously variable fluent control valve for controlling supersonic flow of gas. The valve has an upper plate with a very slightly angled physical control surface and a lower plate with a physical nozzle inlet. As the valve opens and closes during supersonic flow, a hydrodynamic pintle forms in the nozzle inlet just below the physical control surface. The hydrodynamic pintle provides a fluid control surface for redirecting flow from horizontal fllow to vertical flow through the nozzle and, depending on the expansion needs of the supersonic flow, the hydrodynamic pintle changes shape, expanding or shrinking in the axial direction of the valve. Because of the nearly flat physical control surface of the upper plate, matieral ablation is significantly reduced. The fluid-fluid boundary between the hydrodynamic pintle and the supersonic flow produces a flow through the nozzle with little or no recirculation.

Abstract: A pressure regulating device for regulating the pressure exerted on a medical instrument in a reprocessor for microbially deactivating the medical instruments.

Abstract: A relief valve includes an outer stem including a larger diameter fitting section and a smaller diameter fitting section, a movable valve element fitted in both fitting sections so as to be moved between an opening position and a closing position, a communication space extending through the stem and the valve element so that a compressed fluid flows through the space, a first normally closed seal disposed between the valve element and the smaller fitting section for closing a part of a circumferential gap defined between the valve element and the stem, a second seal disposed between the valve element and the larger diameter fitting section for closing a part of the circumferential gap extending from the larger diameter fitting section side to the communication space when the movable valve element has been moved to the closing position, the second seal opening the part when the movable valve element has been moved to the opening position, a relief hole formed in the stem so that the circumferential gap normall

Abstract: A relief valve includes an outer stem including a larger diameter fitting section and a smaller diameter fitting section, a movable valve element fitted in both fitting sections so as to be moved between an opening position and a closing position, a communication space extending through the stem and the valve element so that a compressed fluid flows through the space, a first normally closed seal disposed between the valve element and the smaller fitting section for closing a part of a circumferential gap defined between the valve element and the stem, a second seal disposed between the valve element and the larger diameter fitting section for closing a part of the circumferential gap extending from the larger diameter fitting section side to the communication space when the movable valve element has been moved to the closing position, the second seal opening the part when the movable valve element has been moved to the opening position, a relief hole formed in the stem so that the circumferential gap normall

Abstract: A valve, in particular for the oil circuit of an internal combustion engine. The valve includes a supporting dome, a valve body situated therein, a valve disk which is connected to the supporting dome and has an opening which can be closed by the valve body, and an element having a spring action which urges the valve body into the position in which the valve body closes the opening of the valve disk; the valve disk including a receptacle for a screen element, and the screen element being permanently connected to the valve disk.

Abstract: A pressure regulator has a magnet component group provided with a metal housing in which a winding and an armature are arranged, a flange composed of a synthetic plastic material and connected in an axial direction to the magnet component group, a metal guiding sleeve which is arranged in the flange for orientation and mounting of the magnet component group, a valve closing member which is actuated by the magnet component group and cooperates with a valve seat to separate a return side from a front side; a metal bush which is connected with the housing through a metal connection and on which the valve seat is formed, the metal bushing having at least one discharge opening which leads to the return side.

Abstract: A power steering pump for an automotive power steering system or the like comprises a housing defining a bore and a fluid discharge port and a fluid bypass port communicating with the bore. A flow control assembly is received in the bore and comprises a cartridge that includes a first opening for admitting fluid from the fluid discharge port and a second opening communicating with the fluid bypass port. A flow control valve slides to open and close the fluid bypass port. The flow control valve is biased in the closed position by a coil spring and a retainer. During assembly of the flow control valve, the coil spring and the retainer within the cartridge, the spring compression force may be measured, and the position of the retainer adjusted, to obtain a predetermined opening force for the valve.

Abstract: A spool 33 provided with a flange 39 is inserted in a spool bore 32, and a pressing force of a spring 52 is always applied through the flange 39 to the spool 33 at its one end in a second pressure chamber 35. A fluid groove 60 is formed in an inner peripheral surface of the spool bore 32 at a position near an abutment surface 51. A hydraulic fluid under the same pressure P2 as that in the second pressure chamber 35 is introduced to the fluid groove 60 through a fluid passage 61 formed in a valve body 31. When the flange 39 and the abutment surface 51 are in contact with each other, the hydraulic fluid is allowed to enter the interface between them through the fluid groove 60. A rise of the cracking pressure, which occurs upon the flange coming into tightly close contact with the abutment surface, can be prevented without reducing the strength of the flange 39, and stable opening/closing characteristics of the spool 33 can be achieved.

Abstract: The invention provides a system for regulating pressure equalization in hydraulic mechanisms to suppress oscillation in heavy equipment. The system includes a first and second hydraulic lines, a crossover valve in communication with each of the first and second hydraulic lines, a timing system in communication with the crossover valve, and a motion detector in communication with a heavy equipment component. The motion detector senses a linkage motion and operatively opens the crossover valve, which remains open as directed by the timing system.

Abstract: A fuel system arranged to deliver fuel at high pressure to a fuel injector through a high pressure fuel line defined, at least in part, within first and second housing parts of a pressure relief valve arrangement. The first and second housing parts define first and second separable valve surfaces respectively. A clamping arrangement is provided for applying a clamping load to the first and second housing parts so as to urge first and second valve surfaces respectively thereof into substantially sealing engagement. The clamping arrangement is arranged to permit separation of the first and second valve surfaces in the event that fuel pressure within the high pressure fuel line exceeds a predetermined amount, thereby to permit fuel within the high pressure fuel line to flow to a region of relatively low pressure to relieve fuel pressure within the high pressure fuel line.

Abstract: A relief valve comprising a diaphragm for control of process pressure is provided. The diaphragm has a fluid pressure on a first side and a process pressure on a second side. The second side is engagable with a process void and at least one vent void such that when the process pressure is below the fluid pressure the diaphragm is engaged with the vent void. When the process pressure is above the fluid pressure the diaphragm is not engaged with the vent void.

Abstract: A pressure-control valve (1) comprises a first control piston (1), which is disposed between a first pressure chamber (6), which adjoins the first control piston (1) and is connected to at least one working line (A, B), and a second pressure chamber (7), which adjoins the first control piston (1) and is pushed against a stop (3) by a first preloading spring (4). A throttle (8) connects the first pressure chamber (6) and the second pressure chamber (7). The second pressure chamber (7) is connected to a second control piston (11), which is preloaded by a second preloading spring (17) and which, when a predetermined pressure in the second pressure chamber (7) is exceeded, is displaced to an extent such that a control edge (12) of the second control piston (11) clears a connection of the second pressure chamber (7) to a hydraulic fluid discharge point (23).

Abstract: An oil passage extending from an oil pump to a discharge port in an internal combustion engine is, at its halfway point, branched into at least two oil passages, for example, a first oil passage and a second oil passage. One of the at least two branched oil passages, for example, the second oil passage is provided with a restricting portion configured as a first orifice for restricting a flow amount of oil by reducing a diameter of the first orifice. A bypass valve is provided which acts, when a hydraulic pressure in the second oil passage exceeds a specific value, to bypass the first orifice so as to increase the flow rate of oil. It is possible to increase the hydraulic pressure at the time of low speed rotation up to a necessary pressure only by providing the restricting portion, without enhancing the performance of the oil pump.

Abstract: A pressure regulating valve having secondary venting measures. It comprises a control member for the control of the fluid connection between a primary duct and a secondary duct. The position of the control member is able to be influenced by a venting aperture also under the control of the control member and serving for venting the secondary duct. The venting opening is so arranged on the setting member that it is located outside the comparison chamber and in this respect either directly in the secondary duct or in a region in communication with the secondary duct.

Abstract: A high-pressure fuel pump device which can facilitate the assembly of a high-pressure pump and a high-pressure regulator by standardizing a pump body or a valve housing. The pump body of the high-pressure pump has a high-pressure valve connection portion on the exterior side including a high-pressure passage which is used to connect the high-pressure regulator, the valve housing of the high-pressure regulator has a high-pressure pump connection portion on the exterior side including a high-pressure passage which is used to connect the high-pressure pump, and the high-pressure valve connection portion and the high-pressure pump connection portion are connected to each other to assemble the high-pressure pump and the high-pressure regulator together.

Abstract: A plumbing system which, when ambient outdoor temperatures drop below freezing, circulates water to prevent it from freezing, utilizing a check valve to prevent water from flowing back into the water main and further utilizing a relief valve which can open to the atmosphere and relieve pressure in the system if necessary. The system can have two separate circulation pumps, one for hot water and one for cold water.

Abstract: A valve spool (70) for an oil pump assembly (10) that includes a pilot pressure relief valve (80) to provide pilot pressure relief that increases the stability of the pump assembly (10) and eliminates the delay between the change in the discharge pressure and the associated response to the pilot pressure. The valve spool (70) operates in response to the pilot pressure to increase or decrease the pump discharge pressure during vehicle operation. A chamber (72) within the valve spool (70) is in fluid communication with the discharge flow and pressure at one end and the pilot pressure at the other end. When the pilot pressure exceeds the discharge pressure, the relief valve (80) opens, allowing the discharge pressure and the pilot pressure to equalize.