Abstract: A normally closed subplate mounted valve has a lower valve seat defining a function port, an upper seat, and a sleeve between the upper seat and the lower seat. The sleeve defines a first port. The poppet is movable within the sleeve to selectively seal against the lower seat in a piloted position or to seal against the upper seat in an offset position. The poppet blocks the first port when the poppet is positioned in an offset position. A piston shaft is affixed to the poppet for moving the poppet into the piloted or offset position. A spring biases the poppet in the offset position for preventing fluid flow into the first port. A pilot port supplies pressure for sliding the piston to compress the spring and to move the poppet away from the offset position to the piloted position so that fluid may flow into a supply port and out of the function port. A second port may be provided in the sleeve. The ports may be selectively configured for supply or vent. Components may be joined with retainer springs.

Abstract: A valve unit (V) has a valve housing (50) that includes a supply oil passage (55) configured to receive operating oil from a hydraulic pump, and a pressure adjustment valve (Va) configured to adjust the pressure of the supply oil passage (55). The pressure adjustment valve (Va) includes a pressure adjustment valve body (61) configured to open and close the supply oil passage (55), a compression coil spring (62) that keeps the pressure adjustment valve body (61) at a closed position when the pressure of the supply oil passage (55) is smaller than a set value and allows the pressure adjustment valve body (61) to open when the pressure of the supply oil passage (55) is not smaller than the set value, and a restriction member (63) configured to, when the pressure adjustment valve body (61) becomes open against the urging force of the spring (62) in response to a pressure of the operating oil, abut against the pressure adjustment valve body (61) to restrict movement of the pressure adjustment valve body (61).

Abstract: A fluid pressure control device includes a switching valve, a main pilot passage and a sub pilot passage, the switching valve is configured to be switched to the open position when the working fluid is supplied to the pilot chamber, and to be switched to the throttled position with opening on the downstream side of the switching valve in the neutral passage, and the sub pilot passage is provided with a throttle portion and a check valve in parallel in the throttle portion.

Abstract: A hydraulic system includes: a boom cylinder; a working tool cylinder; a boom control valve; a working tool control valve; first and second fluid tubes through which operation fluid is supplied to the boom cylinder; third and fourth fluid tubes through which operation fluid is supplied to the working tool cylinder; a first relief valve provided in a first bypass fluid tube and configured to allow the operation fluid to flow from the fourth fluid tube toward the first fluid tube and to block the operation fluid flowing from the first fluid tube toward the fourth fluid tube; and a second relief valve provided in a second bypass fluid tube and configured to allow the operation fluid to flow from the third fluid tube toward the second fluid tube and to block the operation fluid flowing from the second fluid tube toward the third fluid tube.

Abstract: The invention corresponds to a mechanical hydraulic pumping unit with a radiator integrated to the chassis and a hydraulic circuit which allows it to operate with high flow rates and low pressure or with low flow rates and high pressure. This mechanical hydraulic pumping unit with a radiator integrated is used to supply a particular pressurized oil flow to a hydraulic actuator, which in turn lifts the load exerted by a string of rods and lift the hydrostatic column that is inside an oil well. The main feature of this mechanical hydraulic pumping unit with a radiator integrated is that the radiator is part of the machine's chassis and is located in the middle of two hydraulic oil tanks. The first of these tanks is the oil suction tank, while the second is the oil return tank.

Abstract: Provided is a construction machine capable of detecting a stuck-open state of a surplus flow control valve in real time during operation without involving a reduction in the operational speed.

Abstract: The present disclosure provides a hydraulic control system for an automatic transmission. The system includes: a linear solenoid valve configured to control a line pressure and to supply the line pressure to a coupling element, a shift valve to which an output hydraulic pressure of the linear solenoid valve is supplied, and a transmission control unit configured to control the shift vale and the linear solenoid valve.

Abstract: The disclosure provides devices and methods for controlling the actuation rates of SPM valves by bi-directionally controlling the fluid which actuates the valve or by maintaining enclosed volumes which communicate with each other through predetermined restrictions as the valve actuates. These enclosed volumes can be completely isolated, depth compensated, share fluid with the pilot actuating fluid, or utilize the main system fluid. The restrictions can be modified to increase or decrease the actuation rates of the SPM valve. The disclosure also provides control over the main system fluid passage opening and closing positions as well as how rapidly the flow passage areas increase or decrease while opening or closing the valve.

Abstract: A pump-regulator combination includes first and second pumps, a control valve, first orifice, and pilot valve. The first pump is configured to pump fluid from a tank to a first point. The control valve is configured to control pressure and/or delivery flow at the first point by adjusting a displacement volume of the first pump. The second pump is configured to pump fluid from the tank to a second point, through the first orifice, and back to the tank. A highest load pressure of the actuator is connected to a third point. The pilot valve includes an adjustable second orifice connected to the third point, via a fourth point, and the tank to pass fluid from the actuator to the tank. A pressure at the second point acts to close the second orifice. A pressure of the fourth point acts to adjust the control valve.

Abstract: A system and method for mixing and dispensing two substances are provided. The system includes: a first substance a first container for containing a first substance, a second container for containing a second substance, a feeding tube, and a pumping system connected to the first container, the second container, and the feeding tube; wherein the system comprises at least three modes of operation: combining the first and second substances into one combined substance, mixing the combined substance, and dispensing the mixed substance; and wherein the pumping system is adapted to perform the at least three modes of operation and dispense the mixed substance to the feeding tube.

Abstract: A flow control apparatus and a flow control method for a construction machine are disclosed, which can perform ground leveling work for smoothing the ground by the self weight of a boom without supplying hydraulic fluid from a hydraulic pump to a hydraulic cylinder.

Abstract: A valve housing of a multiple valve device is formed by being split into two parts, that is, a first housing block and a second housing block abutting against and separated away from each other at positions of facing joining surfaces. Three or more spool sliding bores are provided on the first housing block forming a three-dimensional structure. The other spool sliding bores are provided on the second housing block forming a three-dimensional structure. A relief valve for suppressing maximum pressures in a plurality of oil passages to a predetermined set pressure or less is provided on one of the first and second housing blocks. This relief valve is arranged at a position closer to the joining surfaces than each of the spool sliding bores provided in the one of housing blocks.

Abstract: A method for repositioning a cutterbar assembly of a header of an agricultural harvester. The header includes a chassis. The cutterbar assembly includes a cutterbar and a supporting arm. The method includes steps of connecting one end of the supporting arm to the chassis, further connecting the supporting arm to the chassis via a down-stop linkage assembly positionable between first and second positions, engaging a lockout tool with the down-stop linkage assembly, applying a torque to the down-stop linkage assembly via the lockout tool, and repositioning the down-stop linkage assembly from either the first position or the second position upon application of the torque. An opposite end of the supporting arm is connected to the cutterbar. In the first position, the cutterbar is positioned distal to a front end of the chassis, and in the second position, the cutterbar is positioned proximal to the front end of the chassis.

Abstract: A flow control valve for a hydropneumatic suspension comprises a circular valve body including a flow restriction and a plurality of flow relief passages closed at one side by respective leaf springs. Further flow relief is provided by a reciprocal central sleeve which contains the flow restrictor and is movable to unseat one or both leaf springs.

Abstract: A solenoid valve module includes a first solenoid valve having a first solenoid portion and a first valve body and a second solenoid valve having a second solenoid portion and a second valve body. The first valve body and the second valve body are integrally formed by a solenoid housing. The solenoid valve module is secured to a surface of an engine to provide hydraulic control for an engine component.

Abstract: An electronic expansion valve is provided, wherein a piston component and a valve needle component are located at the same side of a valve core seat. When refrigerant flows forwards, the piston component closes the bypass through hole, the refrigerant flows to a side of the vertical connecting pipe via the valve core valve port, and the valve needle component moves in the axial direction to regulate an opening of the valve core valve port. When the refrigerant flows reversely, the piston component moves upwards in the axial direction to open the bypass through hole, and the refrigerant flows to a side of the transverse connecting pipe via the bypass through hole.

Abstract: A valve assembly in accordance with the present invention includes a head portion and a body portion. A throughbore extends through both the head portion and the body portion. A normal fluid flow path is formed within the valve assembly to provide for the controlled exit of a fluid. The valve assembly also includes an automatic pressure-relieving mechanism. The pressure-relieving mechanism includes a disc designed to burst or rupture at a predetermined pressure and an over-pressure fluid flow path for controlling the egress of over-pressure fluid.

Abstract: A hydraulic valve comprises a plurality of ports, which communicate with a passageway, and a valve member movable in the passageway to control the communication between the ports. The valve member carries a lateral shear seal which is integral with the valve member and engages the passageway. In one position, the valve member isolates a first port from a second port. In another position of the valve member, the shear seal communicates with the first port and provides communication between the first port and the second port by way of a passage within the valve member. The valve member has first and second portions of different effective cross-section areas and on each portion an integral sealing member makes a radial seal between the valve member and the passageway. A supply port supplies pressure to the outside of the valve member so as to produce by virtue of the different cross-sectional areas a force tending to move the valve member towards a closed position.

Abstract: Embodiments of the present invention are directed toward pressure controllers and calibrators for setting or measuring pressures in test devices. In one embodiment, the pressure controller contains a dual reference pressure controller. The dual reference pressure controller is operable to maintain two different pressures relative to a reference pressure. The first pressure being a relatively fixed amount greater than the reference pressure and the second pressure being a relatively fixed amount less than the reference pressure.

Abstract: A fuel transfer system for use with a motor vehicle of the type having a fuel tank and a fuel sending unit in the fuel tank for pumping fuel thorough a fuel line to the vehicles engine when the engine is idling where the fuel transfer system allows fuel in the fuel tank to also be delivered to an auxiliary fuel vessel such as another fuel tank, a fuel container, or an engine powered machine is provided. Embodiments of the present invention include features for draining the fuel transfer system when it is not in use for filling an auxiliary fuel vessel.

Abstract: A potable water storage system includes a plurality of water storage containers that are connected to a water inlet. Water flows through the water storage container to water outlets that provides water to the equipment and fixtures of the building. Routine consumption of water by systems and occupants in the building continually refreshes water in the storage containers, without requiring additional energy input or effort in routine operation. The system also includes a bypass pipe that connects the water inlet to the water outlet and bypasses the plurality of water storage containers. Valves are also coupled to the water storage system. In the event of an emergency where potable water is not available, the valves can be closed to isolate the potable water in the water storage containers. The water storage containers can provide emergency potable water to the people in the building and can be expanded or reconfigured.

Abstract: Embodiments of the present invention are directed toward pressure controllers and calibrators for setting or measuring pressures in test devices. In one embodiment, the pressure controller contains a dual reference pressure controller. The dual reference pressure controller is operable to maintain two different pressures relative to a reference pressure. The first pressure being a relatively fixed amount greater than the reference pressure and the second pressure being a relatively fixed amount less than the reference pressure.

Abstract: A gas supply unit and a gas supply system that are small-sized and inexpensive. The gas supply unit is installed on operation gas conveyance pipeline and has fluid control devices communicated via flow path blocks and controlling operation gas. The gas supply unit has the first flow path block, to one side of which an inlet open/close valve included in the fluid control devices is attached, and also has the second flow path block, to one side of which a purge valve included in the fluid control devices is attached. The first flow path block and the second flow path block are layered in the direction perpendicular to the conveyance direction of the operation gas. The inlet open/close valve and the purge valve are arranged between a mass flow controller installed on the operation gas conveyance pipeline and an installation surface where the unit is installed.

Abstract: A check valve system controls the flow of fluid between a spool valve and a hydraulic actuator and includes a pilot operated check valve that is controlled by a lock-out valve. The check valve has a poppet that engages and disengages a first valve seat in response to a pressure in a control chamber. The lock-out valve has an inlet connected to the control chamber, an outlet connected to an opening in the bore of the spool valve, and an second valve seat between the inlet and the outlet. A valve member that selectively engages and disengages the second valve seat and spool of the spool valve applies force to the valve member which responds by moving into engagement with the second valve seat. Thus in one position, the spool valve maintains the lock-out valve closed which traps pressure in the control chamber which tend to keep the check valve closed.

Abstract: Disclosed herein is an exemplary supplemental heating system including a liquid heat generator having a hydrodynamic chamber for selectively heating a fluid. The supplemental heating system further includes a manifold having an inlet passage fluidly connectable to a discharge passage of a heat exchanger, a first discharge passage fluidly connectable to an engine cooling system, and a second discharge passage fluidly connected to an inlet passage of the hydrodynamic chamber. A control valve comprising a spool slideably disposed within the manifold controls distribution of the fluid between the manifold inlet passage and the first manifold discharge passage, and the manifold inlet passage and the manifold second discharge passage.

Abstract: A directional hydraulic valve has a feed chamber, two user connection chambers, two discharge chambers connected to a discharge tank, and a control spool. The hydraulic valve also has two intermediate chambers which are connected together, each adjacent the feed chamber and one of the user connection chambers. The intermediate chambers are adapted to be places in fluid communication with a flow regulating device which regulates the flow of fluid originating from the feed source and directed to the feed chamber in relation to the pressure value of the fluid present in the intermediate chambers. The valve has a valve mechanism for connection between the intermediate chambers and one of the discharge chambers.

Abstract: An option valve for controlling the operation of an option actuator added as an option is installed into each of first and second main valve blocks in each of which plural control valves, a pressure oil supply line connected to a pump and a tank line connected to a tank are incorporated, and plural types of connection blocks incorporating circuit elements to be added to the option valve are attached to the main valve blocks selectively to constitute a hydraulic valve device. According to this hydraulic valve device, it is possible to widely cope with various option attachments despite a built-in system with the option valve incorporated beforehand in the main valve blocks.

Abstract: The redundant valve system 10 of the preferred embodiment includes a first valve unit 12 and a second valve unit 14. The redundant valve system 10 is preferably used to connect a source 16 to a destination 18 and to connect the destination 18 to a reservoir 20. The first valve unit 12 and the second valve unit 14 are coupled to control fluid flow such that fluid flow is allowed in only one of two given directions at any given time, either from the source 16 to the destination 18 or from the destination 18 to the reservoir 20.

Abstract: An assembly of a plurality of hydraulic control valves is housed in a single-piece body. For each control valve, a spool bore and an aperture for a pressure compensation valve are provided in the monolithic body. Each spool bore is connected to several return passages and a supply passage that extend through the monolithic body. A pair of workports also is connected to each spool bore. A relief valve return passage also extends through the monolithic body and where needed, apertures for pressure relief valves extend from a surface of the monolithic body intersecting the relief valve return passage and a given workport. A load sense passage and a second supply passage also are formed in the monolithic body.

Abstract: A single stage, electrically controlled variable pressure relief valve assembly is provided that uses a valving element assembly slideably disposed within a housing having first and second inlet and outlet ports, the valving element assembly has a differential area defined thereon which acts in cooperation with an electrically controlled coil assembly to proportionally control the flow of fluid between the inlet port and an outlet ports of the housing. The valving element assembly has inlet and outlet ports that are oriented generally perpendicular to the flow of the fluid through the valving element assembly to effectively offset the effects of flow forces acting on the valving element.

Abstract: A hydraulic valve system (1) with a supply connection arrangement, has a high-pressure connection (P) and a low-pressure connection (T), and a working connection arrangement, having two working connections (A, B), which can be connected with a motor, and a directional valve (4) and a compensation valve (9). A compensation valve (9) is arranged after the directional valve (4) in the flow direction and a pressure relief device (43) is arranged between the directional valve (4) and the low-pressure connection (T).

Abstract: A single stage, electrically controlled variable pressure relief valve assembly is provided that uses a valving element assembly slideably disposed within a housing having first and second inlet and outlet ports, the valving element assembly has a differential area defined thereon which acts in cooperation with an electrically controlled coil assembly to proportionally control the flow of fluid between the inlet port and an outlet ports of the housing. The valving element assembly has inlet and outlet ports that are oriented generally perpendicular to the flow of the fluid through the valving element assembly to effectively offset the effects of flow forces acting on the valving element.

Abstract: The valve assembly of the invention comprises a one-piece body (10) having in its interior a single main axial cylindrical cavity (11) of rectilinear axis, communicating via an outer mouth with at least one outer face (10a) of the one-piece body (10), and first channels (13, 14, 14′, 15) communicating with said main cavity (11) and connected to the delivery side (13) of a liquid pressurizing pump, to the discharge, and to at least one user take-off (16) respectively; inserted into the one-piece body (10), a cylindrical cartridge (20) having an axial second cavity (21) coaxial with the main cavity (11), which cartridge engages the surface of the main cavity (11) and is arranged to create, between its own cylindrical outer surface and the surface of the main cavity (11), passages providing communication between said first channels (13, 14, 14′, 15); valve elements (E1-E4), inserted into the second cavity (21) and arranged to define, in combination with this latter, at least two or more valves with d

Abstract: The invention concerns a hydraulic line connection with a supply connection (2) having a pressure line and a return line, each ending at a connection valve (4,5), and with a safety valve (8) in a line between the pressure line and a consumer (1), said safety valve having a valve element (9), whose one side is acted upon by the pressure at the pressure connection (P) with the purpose of opening. The aim is to safely provide a connection of this kind in a simple way. For this purpose the other side of the valve element (9) is directly connected with the return line.

Abstract: A dual-spool hydraulic directional valve for controlling the motion of a hydraulic cylinder or similar device. The dual-spool hydraulic directional valve of the present invention is less costly to manufacture, may be more easily repaired, and is more resistant to contamination than current hydraulic directional valves. The dual-spool hydraulic directional valve of the present invention is particularly suited to applications where the valve is not required to hold a load. The valve of the present invention uses two valve spools, with each valve spool controlling flow of hydraulic fluid through a particular port or ports. The valve spools work independently from one another, therefore, the slight leakage of hydraulic fluid from one valve spool to the other will not markedly affect the operation of the valve. In a preferred embodiment of the valve, a lever is utilized to shift the positions of the respective valve spools, although other means, such as electronic solenoids may also be used.

Abstract: A control valve device controls the movement of at least one hydraulic user. Relative movement of a control spool valve of a control valve with respect to a housing controls the connection of at least one hydraulic connection that is in communication with the user with a delivery connection and with a reservoir connection. The control spool valve can be moved relative to the housing by an actuator device. The housing has a multi-layer construction consisting of plates connected with one another by soldering or another adhesive, which plates comprise intermediate plates that are located between two end plates. The thickness (D) of the end plates is greater than the thickness (d) of the intermediate plates, whereby the end plates are provided with a fastening device for the actuator device and/or of connection devices for the hydraulic lines.

Abstract: The invention concerns a hydraulic line connection with a supply connection (2) having a pressure line and a return line, each ending at a connection valve (4,5), and with a safety valve (8) in a line between the pressure line and a consumer (1), said safety valve having a valve element (9), whose one side is acted upon by the pressure at the pressure connection (P) with the purpose of opening. The aim is to safely provide a connection of this kind in a simple way. For this purpose the other side of the valve element (9) is directly connected with the return line.

Abstract: An on/off valve (O/OV) and directional valves (DV1, DV2) are packaged with a switching valve system (10) in a housing assembly (156, 157, 158, 160). The on/off valve (O/OV) is operated by a control handle (154) that is located at one end of the housing assembly (156, 157, 158, 160). The direction control valves (DV1, DV2) are operated by a handle (141) located at the opposite end of the housing assembly (156, 157, 158, 160). The control handles (154, 141) operate to position cams (152, 136, 138) which function to help position valve plugs. In a second embodiment, the handle (141) and cams (136, 138) for controlling the directional valves (DV1, DV2) are replaced by a solenoid valve system (SV2) . A second solenoid valve (SV1) is added to the control system for the off/on valve (O/OV). The solenoid valve (SV1, SV2) allow for a remote positioning of the controls for the off/on and directional valves (O/OV, DV1, DV2).

Abstract: An on/off valve (O/OV) and directional valves (DV1, DV2) are packaged with a switching valve system (10) in a housing assembly (156, 157, 158, 160). The on/off valve (O/OV) is operated by a control handle (154) that is located at one end of the housing assembly (156, 157, 158, 160). The direction control valves (DV1, DV2) are operated by a handle (141) located at the opposite end of the housing assembly (156, 157, 158, 160). The control handles (154, 141) operate to position cams (152, 136, 138) which function to help position valve plugs. In a second embodiment, the handle (141) and cams (136, 138) for controlling the directional valves (DV1, DV2) are replaced by a solenoid valve system (SV2). A second solenoid valve (SV1) is added to the control system for the off/on valve (O/OV). The solenoid valve (SV1, SV2) allow for a remote positioning of the controls for the off/on and directional valves (O/OV, DV1, DV2).