Abstract: An adjustment device for a water delivery unit includes a valve body extending along a longitudinal axis with a water inlet and outlet, a shutter arrangement to control water flow from the inlet to the outlet, a first actuating member movable along the longitudinal axis to arrange shutter arrangement into opening and closing positions to respectively enable/disable the passage of water and a second actuating member rotatable about the longitudinal axis to vary the opening position of the shutter arrangement to adjust a flow rate of the water exiting the valve body. The device has a manual control member coupling with the first and second actuating members and configured to receive a manual action by a user for opening, closing and adjusting the flow rate of the water. The second actuating member cooperates with the shutter arrangement through a cam arrangement for varying the opening position of the shutter arrangement.

Abstract: The present disclosure relates to a water supply device for sanitary ceramics, including a housing including a water supply hole, a water discharge hole, and an opening/closing device including a diaphragm formed above the water discharge hole, a partition cap having a support protrusion and a through-hole through which an upper space communicates with a lower space of the housing, a cam plate configured to gradually open or close the through-hole, a shaft part formed above the cam plate, and a motor formed on the upper surface of the housing to rotate the shaft part, wherein the cam plate, rotating and elevating along the upper surface of the support protrusion of the partition cap, gradually opens or closes the through-hole and gradually opens or closes the water discharge hole by the diaphragm, and thus the flow of water discharged through the water discharge hole is prevented from being suddenly blocked.

Abstract: A proportioner having a body portion that defines a fluid passage for transporting a fire protection fluid and a foam passage for transporting a foam concentrate. The foam concentrate mixes with the fire protection fluid to form a fire protection solution. The proportioner also includes a restrictor assembly having a restrictor disk and an orifice plate. The orifice plate has an opening for receiving the restrictor disk. The restrictor disk and opening are configured to form an annulus between an outer surface of the restrictor disk and an inner surface of the opening when at least a portion of the restrictor disk is disposed within the opening and the restrictor disk is spaced from the orifice plate. The restrictor assembly is configured to maintain the annulus for a full travel range of the restrictor disk.

Abstract: A servo valve for precisely controlling a position of a pneumatic cylinder does not require a servo amplifier and a small sized and/or high durability servo valve unit. The servo valve comprises a unit body having first and second portions, first and second valve portions, first and second seal members that open and close the first and second valve portions, respectively, first and second drive mechanisms that drive first and second seal members by first and second electric pulses, respectively, a supply flow path between the first end and first valve, an exhaust flow path between the second end and second valve, a common flow path connected to the supply and exhaust flow paths via first and second valve portions, and a drive flow path connected to the pneumatic actuator. First and second drive mechanisms are arranged in a drive mechanism arrangement portion located between first and second end portions.

Abstract: An electropneumatic control system for a pneumatic drive and electropneumatic position controller for the system, wherein a volume flow booster having a bypass valve is downstream of the position controller to increase the air capacity, where the pneumatic drive is run in a new operating mode multiple times at maximum air capacity in a first direction to support an operator in adjusting the bypass valve, and where upon exceeding a specified position, the air capacity is set to zero, an overshoot value of the pneumatic drive is determined and output for the operator on a display such that by varying adjustment of the bypass valve, the operator can find and set an adjustment of the valve having low overshoot such that with an adjustment found in such a manner, the transition behavior of the control system can be significantly improved without additional effort.

Abstract: A pulsation dampener includes: a housing having in internal cavity; an expandable bellows positioned within the internal cavity of the housing, the expandable bellows having a proximal end, a distal end, and an expandable portion between the proximal and distal ends; a bellows support member coupled to an interior side of the distal end of the expandable bellows and extending longitudinally away from the distal end of the expandable bellows toward the proximal end of the expandable bellows; and a cap fixed with respect to the housing and positioned to support the bellows support member when the expandable bellows is in a longitudinally compressed configuration.

Abstract: A pulsation dampener system is provided. The pulsation dampener system includes a pump that pumps fluid through the pulsation dampener system. A pulsation dampener is located downstream from the pump and dampens pulsations within the fluid. A pressure sensor is located downstream from the pump and detects a pump pressure of the fluid at the pulsation dampener. A wye pipe located downstream of the pulsation dampener and the pressure sensor that diverts the fluid into two or more flow paths. From the wye, a first flow path increases pump pressure of the fluid and a second flow path allows the fluid to flow unrestricted. Piping receives the fluid from the first flow path and the second flow path and discharges the fluid further downstream.

Abstract: The invention relates to a method for controlling a hydraulically actuated drive unit (1-3), especially for a valve or control device, wherein at least on a part of the displacement of the drive unit the displacement speed (v?) is detected and compared with a predetermined target displacement speed (v), whereupon in the case of a difference between actual value (v?) and target value (v) of the speed, the controlling of the drive unit (1-3) is changed such that the displacement speed (v?) of the drive unit is adapted to the target value (v).

Abstract: A valve system including a shuttle valve having first and second inlet channels connected respectively to first and second channels, a cavity, an outlet channel and a moveable element, the first and second inlet channels being in fluid communication with outlet channel via the cavity; wherein a moveable element is moveable within the cavity such that the position of the moveable element is determined by relative pressure levels in the first and second inlet channels, in a first position the movable element forming a seal between the moveable element and the first inlet channel, in a second position the moveable element forming a seal between the moveable element and the second inlet channel, and in a third position the moveable element being located between the first and second positions and allowing the passage of fluid from both the first and second channels.

Abstract: The present invention is a nitrous oxide safety system or method that provides a safety control valve actuated by low-vacuum fluids to control the release of nitrous oxide therethrough. The nitrous oxide safety system may include a low-vacuum fluid, a nitrous oxide fluid, a scavenging mask assembly, and a safety control valve. The low-vacuum fluid is generated by a vacuum source operating to achieve a predetermined parameter and the nitrous oxide fluid is provided by a nitrous oxide source. The scavenging mask assembly is fluidly connected with the nitrous oxide source and the vacuum source. The safety control valve is fluidly connected to the fluid connection between the nitrous oxide source and the vacuum source. The safety control valve is configured to be actuated when the low-vacuum fluid is input to the valve to release a flow of the nitrous oxide fluid through the safety control valve.

Abstract: An apparatus for containing and controlling the flow of hydrocarbons from a bore well or other earth formation includes a housing enclosing a receiving and distribution chamber, receiving and distribution chamber is in fluid communication with and sealably connected to a top vertical tubular member and a bottom vertical tubular member, wherein the top and bottom tubular members extend from the receiving and distribution chamber to the exterior of said housing. The apparatus further includes a cone aperture adapted to prevent or allow the flow of liquid into the top tubular member, at least one outlet passage between the receiving and distribution chamber and the exterior of the housing, valve means adapted to permit or prevent the flow of liquid through at least one of said outlet passages, and pump devices adapted to facilitate the flow of hydrocarbons through at least one of said outlet passages.

Abstract: The invention relates to an electropneumatic position controller having a controllable valve group (9, 10, 13) arranged in the position controller and having at least one valve (9, 10), by means of which in normal operation either compressed air supplied by means of a compressed air supply line (6) can be fed to an exhaust connection (8) or air fed by means of the exhaust connection (8) can be discharged to the outside, depending on the actuation of the valve group. In order for the valve group to be brought in a safe position, even in the event of a leak in one of the components thereof, said group is arranged in a gas-tight housing (14) within the position controller and means (15) are provided for monitoring the pressure in the housing (14) and for actuating the valve group (9, 10, 13) such that if the pressure in the housing (14) exceeds a predefined threshold value, said group is brought in the predefined safe position.

Abstract: A device (1; 101) for controlling the flow of a fluid through a conduit (2; 102; 402; 602; 702) from an upstream side (3; 103; 703) to a downstream side (5; 105; 405; 605; 705), the device (1; 101) comprising: a valve having a valve member (14; 114; 414; 514; 614) arranged to move reciprocally selectively to open and close one or more valve apertures (10; 110; 412; 512; 611, 612), thereby controlling flow of the fluid from the upstream side (3; 103; 703) to the downstream side (5; 105; 405; 605; 705); and means for introducing a reference pressure (24; 124; 324; 424; 524; 624); wherein said valve member (14; 114; 414; 514; 614) is acted on by the pressure of the downstream side (5; 105; 405; 605; 705) and the reference pressure so as to be moved by the difference between said pressures.

Abstract: A valve positioner system with zero bleed at steady state is disclosed. The system has a pilot valve, the operation of which is controlled by an electronic circuit powered from a signaling and power connection of a positioner device. A plurality of pneumatic valves are activated and deactivated by the pilot valve to control a valve actuator. With varying configurations and arrangements of normally open or normally closed pilot valves and pneumatic valves, fail freeze and fail safe operations are contemplated. The activation and deactivation of the pilot valve is controlled by an electronic circuit that monitors a valve position signal.

Abstract: A blowout preventer comprises a pair of ram assemblies which are mounted on diametrically opposite sides of a BOP housing. A cylinder-ram is slidably received within each ram assembly and includes a cylindrical cavity. A back plate couples with the outer end of the cylinder-ram and a piston head is positioned in the cavity, forming first and second piston chambers. Hydraulic pressure in the first and second piston chambers forces the cylinder ram from an open position to a closed position, thereby sealing the BOP bore.

Abstract: A change-over valve comprises a spool housed in a spool housing, and a pilot chamber facing at least an end of the spool. An axial passage is formed in the spool along the axial direction. While being connected to a pilot chamber, the axial passage communicates with a tank passage via a small hole having an opening on an outer periphery of the spool in accordance with displacement of the spool, to discharge the air in the pilot chamber to the tank passage. Since the axial passage is formed at a location offset from a center axis of the spool, a length of the small hole is shortened and the small hole is easily processed.

Abstract: A method implemented by a valve operating apparatus for hands free exercising of an in ground utility valve, which may include repeatedly opening and closing the utility valve without requiring the use of a computer program or a physical human manipulation. A valve operating apparatus may include a bi directional hydraulic powered motor which may be coupled to a utility valve stem for the purpose of rotating the valve stem of the utility valve in a closing direction or an opening direction. The direction of rotation, of a hydraulic motor, may be reversed in response to detecting an opening of a preset pressure relief valve.

Abstract: A spool valve is equipped with a valve body, a spool arranged in a valve chamber such that the spool can be displaced between a first position, which allows communication between an inlet port and an outlet port, and a second position, which blocks communication between the inlet port and the outlet port, a pilot valve mechanism disposed in the valve body and which causes displacement of the spool along an axial direction under the pressure of a pilot fluid that acts on one end surface of the spool, and a spring that biases the spool toward one side in the axial direction.

Abstract: A piloted proportional throttle valve has a valve piston (29) displaceably guided in the longitudinal direction in a valve housing (13) having a fluid inlet (2) and outlet (1). The front side of the valve piston (27) can be pressurized against a main valve seat (25) by fluid pressure acting on its back side. A pilot valve device has an actuating member (7) displaceable in the longitudinal direction by an electrically actuatable magnet system (4), and works with a pilot valve seat (37) in a bore (17) of the valve piston (29) connecting its back side to the fluid outlet (1) on the front side of the piston. The fluid pressure on the back side of the piston (29) is reduced for an opening motion when the pilot valve seat (33) is released. A flow baffle device (39) is disposed between the back side of the piston and the fluid inlet (2) of the housing (13) to build up the fluid pressure pressurizing the piston (29) against its closed position by introducing pilot fluid.

Abstract: Device for controlling the supply of a system from a pressurised fluid source comprising an inlet (8), an outlet (10) of pressurised fluid, a main duct (11) connecting the inlet (8) and the outlet (10), and control means comprising: a secondary duct (12) connecting the supply inlet (8) to the evacuation outlet (10), a moving sealing element (14) interrupting the flow in the main duct (11), a sealing device able to interrupt the flow in the secondary duct, a pilot chamber (18) between the moving sealing element (14) and the sealing means, connected to the inlet (8). In a closed state of the sealing device, the moving sealing element (14) interrupts circulation of the fluid between the inlet (8) and the outlet (10), and, in an open state of the sealing device, the moving sealing element enables flow between the inlet (8) and the outlet (10).

Abstract: A double action directional fluid flow valve includes a stepped piston connected with a poppet valve and moveable by a controller between open and closed positions by applying a continuous pressure to a small diameter piston face and selectively applying and removing pressure from a large diameter piston face to move the poppet valve between an open position and a closed position.

Abstract: A pressure-actuated valve fit to a tubing string for alternately closing to communicate fluids from a wellbore to the tubing string and opening to communicate fluids from a wellbore annulus to the tubing string. The valve is particularly useful for lifting liquids which accumulate in the tubing string when the reservoir has a diminished pressure. In this case, gas is accumulated in the wellbore annulus and when the valve is opened the gas enters the valve and is directed to the tubing string for lifting the liquids. The valve is closed by a spring and has a closing-assist which applies an additional force to the spring to ensure the valve is fully closed.

Abstract: A valve assembly for sealing a port of a housing includes a primary sealing member and a secondary sealing member mounted to a valve body. Valve body includes a lower body with an upper portion depending from the body having a cross sectional diameter less than the upper body, and a lower portion depending from the upper portion having a cross sectional diameter less than the upper portion. The primary member includes apertures and is slidably mounted to the upper portion, and the secondary member is mounted to the lower portion. In a closed position the secondary member seals against the primary member, and the primary member seals against the port. Downward movement of the valve body unseals the secondary member from the primary member allowing venting through the apertures, and then unseals the primary sealing member from the port allowing full venting through the housing.

Abstract: A subsea control module for subsea well equipment has an actuator having a rod with a remote operated vehicle (ROV) interface on one end and a latch on an opposite end that latches to a subsea receptacle. Segments are releasably mounted around and to the actuator. Each of the segments has a sealed housing containing at least one internal control component. Couplings depend from the housing for engaging mating couplings in the receptacle. The housing has two radial walls, each extending along a radial line from an axis of the rod. An outer wall joins outer ends of the radial walls, the outer wall being a portion of a cylinder. An inner wall joins inner edges of the radial walls. The radial walls of adjacent ones of the segments abut each other.

Abstract: A bypass directional control valve has a valve sleeve, and two sets of outlet ports on each of two axial sides of the inlet ports. The outlet and the inlet ports all are formed to be cylindrical holes, and a diameter of the inlet ports is greater than a diameter of the outlet ports. A valve sleeve, a spool, a fluid flow system and a method are all also disclosed.

Abstract: A hydraulic vale controller that uses an existing pressure differential as some or all of the power source for valve operation. In a high pressure environment, such as downhole in an oil or gas well, the pressure differential between the inside of a pipe and the outside of the pipe may be adequately large to drive a linear slide valve. The valve is operated hydraulically by a piston in a bore. When a higher pressure is applied to one end of the bore and a lower pressure to the other end, the piston moves in response to the pressure differential and drive a valve attached to it. If the pressure differential is too small to drive the piston at a sufficiently high speed, a pump is provided to generate a larger pressure differential to be applied. The apparatus is conveniently constructed using multiport valves, which can be rotary valves.

Abstract: A system for hydraulically managing fluid pressure between selected set points includes a pilot control system operably coupled to a main valve. The pilot control system includes at least one fluid conduit, a variable orifice assembly, and a control pilot valve apparatus. Fluid is passed through a fixed orifice and into a first chamber of the control pilot valve apparatus. Fluid is passed through the variable orifice of the variable orifice assembly and into a second chamber of the control pilot valve apparatus. The main valve is hydraulically opened or closed in response to a pressure differential between the first and second chambers of the control pilot valve apparatus so as to manage fluid pressure downstream of the main valve between the selected upper and lower set points.

Abstract: An SPM valve for use in a subsea environment includes a spool selectively movable between first and second positions to thereby arrange the valve in respective armed and disarmed configurations. The particular arrangement of a supply port and discharge port with respect to the spool permits a pressurized working fluid supplied to the supply port to bias the spool to both the first and second positions once an external force is applied to the spool to initially set the spool in either the first or second position.

Abstract: A pressure and flow altitude compensated shut off valve includes a valve body, a valve element, and an altitude compensation pilot valve. The valve body has an inlet port, an outlet port, and a flow passage extending between the inlet port and the outlet port. The valve element is disposed within the flow passage and is responsive to fluid pressure at the inlet port to move between a closed position, in which fluid may not flow through the flow passage, and a plurality of open position between the closed position and a full-open position. The altitude compensation pilot valve is coupled to the valve body and is responsive to pressure variations at the second port to control the fluid pressure at which the valve element moves to the closed and open positions.

Abstract: A relief valve assembly to relieve overpressure of a pressurized fluid. In accordance with some embodiments, the assembly comprises a housing with an inlet and an outlet to form a conduit for a pressurized fluid. A normally closed valve member is axially displaceable within the housing to engage a valve seat to prevent a flow of the pressurized fluid along the conduit. A biasing member applies a bias force to the valve member to retain the valve member against the valve seat. A piston within the valve member contactingly engages the pressurized fluid. A mechanically collapsible member resists axial movement of the piston responsive to said contacting engagement of the pressurized fluid. The piston and collapsible member decouple the bias force supplied by the biasing spring member upon the valve member from a force upon the valve member applied by the pressurized fluid, thereby maintaining a bubble-tight seal.

Abstract: A pneumatic actuator air flow control system includes a pneumatic rotary actuator (PRA) and a solenoid air flow control valve (SAFCV). The PRA contains an air reservoir and a vane housing allowing pressurized air to rotate an air-driven vane. The SAFCV includes a flow control valve body (FCVB), a pilot solenoid valve (PSV) and a switch system, wherein the FCVB and the PRA can be connected to direct the pressurized air into the air reservoir, and the PSV is used to control the pressurized air in and out of the PRA to change the vane's rotation movement in the vane housing. Additionally, the switch system allows users to switch between a double-acting and fail-safe operation. When there is no pressurized air and/or electrical power and if an emergent need to open or close the valve, a manual override in the PSV can be used without further installation of a declutchable manual gear operator or external piping when there is no pressurized air and/or electrical power.

Abstract: A rigid piston assembly for use in a conventional flush valve includes a rigid piston configured to fixedly engage within the valve body. The present invention is also directed to a flush valve for a plumbing fixture as well as a method of retrofitting a rigid piston into a diaphragm flush valve body.

Abstract: The temperature-responsive fluid flow control apparatus of the present invention comprises: a housing installed between the inlet and the outlet of a fluid pipe in which a fluid flows; a valve block installed inside the housing to allow inflow of the flowing fluid in the housing and to discharge a portion of the flowing fluid to the outside according to the change in the internal pressure; and a temperature-responsive device for generating a pressure difference in the valve block according to the temperature change of the temperature-responsive fluid filled therein. The temperature-responsive fluid flow control apparatus prevents the fluid flowing pipe from freezing by discharging a portion of the fluid flowing in the housing to the outside, when the temperature of the temperature-responsive fluid reaches a preset temperature as the external temperature drops.

Abstract: An integrated multifunctional valve device includes a surface member having a first port and a second port formed therein, a flexible disk member having a central portion and a surrounding portion, a first seat member extending outward from the surface member and coupled to the surrounding portion of the flexible disk member, a second seat member extending outward from the surface member and surrounded by the first seat member. The central portion is movable between an open port position to establish fluid communication between the respective ports and a close port position to stop the fluid communication between the respective ports. The second seat member is configured to selectively receive the central portion of the flexible disk member corresponding to the close port position. The integrated multifunctional valve device also includes an actuator member configured to selectively move the central portion of the flexible disk member into the open port position and the close port position.

Abstract: A bathroom flusher includes a flusher body, a valve assembly, an electronic control system, and a flusher cover. The flusher body includes an inlet and an outlet, and is designed to accommodate the valve assembly that controls water flow between the inlet and the outlet. The valve assembly includes a valve member movable with respect to a valve seat providing a sealing action based on applied pressure on the valve assembly. The bathroom flusher also includes an external cover designed for enclosing an electronic control module comprising a battery, a sensor, and an actuator for controlling operation of the flush valve, wherein the external cover includes at least two cover parts separately removable, and wherein the external cover is attachable with respect to the valve body in a manner also allowing removable attachment of the control module.

Abstract: A device has been disclosed that may include a spool valve including a body having a first connector and a second connector and a spool movable relative to the body for controlling flow between the first connector and the second connector. The reversible flow control assembly further may include a pilot valve device developing a single pressure command in the form of a fluid at a command pressure. The spool valve may be responsive to the single pressure command developed in said pilot valve device to control flow between the first connector and the second connector without regard to the direction of flow. The majority of axial forces acting on the spool to position the spool relative to the body when fluid is flowing through the valve may be fluid forces.

Abstract: A first resilient member generates a resilient force to urge a valve portion in a valve-closing direction. A second resilient member generates a resilient force against the resilient force of the first resilient member. The resilient force of the first resilient member and the resilient force of the second resilient member are set to be balanced with each other when the valve portion is placed in a lift position that is between a full-closing position of the valve portion, in which the valve portion is seated against a valve seat to fully close a fluid passage, and a full-opening position of the valve portion, in which the valve portion is fully lifted away from the valve seat to fully open the fluid passage.

Abstract: An apparatus for regulating the flow of a fluid from a source to a target location comprises a housing defining a fluid inlet configured to communicate with a fluid source and a fluid outlet configured to communicate with a target location, and a flow path extending between the fluid inlet and fluid outlet. An inlet valve assembly is mounted in the flow path and comprises a valve seat and a valve member configured to cooperate with the valve seat to regulate flow through the flow path. A balance arrangement is provided and is configured to balance the effect of fluid pressure acting on the inlet valve assembly.

Abstract: A valve device (14) of a hydraulic system (1) for actuating at least one shifting element (2) of a transmission. The valve device comprising a pilot-controlled control valve device (3) with a valve slide (9) and, functionally connected with this is, an also pilot-controlled switching valve device (4) which is also formed with a valve slide (7). The valve slides (7, 9) are arranged to move longitudinally in a common bore (15) of a valve housing (16) and are positioned coaxially with one another, and an inner valve slide (7) is arranged to move longitudinally at least partially within the outer valve slide (9).

Abstract: A pressure relief valve control system provides a method and apparatus for rapidly closing a relief valve in response to excess fluid pressure. The system uses a programmable controller to rapidly communicate pressure changes to a solenoid actuated valve and two control valves. The solenoid actuated valve has a dedicated accumulator and the two control valves have another dedicated accumulator.

Abstract: A technique facilitates controlling fluid flows, such as fluid flows in a downhole well zone or zones. A flow control valve is employed to control a fluid flow and is operationally linked with an injection valve. Actuation of the flow control valve is used to automatically actuate the injection valve between corresponding positions allowing or blocking fluid injection. Closing or opening of the flow control valve thus results in a desired corresponding action of the injection valve, such as blocking flow or allowing flow through the injection valve.

Abstract: A pressure control valve is provided, which can variably control the set pressure of a relief valve in accordance with pilot signal pressure that is controlled in an operator's seat and so on when the set pressure of the relief valve required in a replaced working device is changed.

Abstract: A pilot-controlled valve arrangement having at least one valve mechanism mounted in a valve housing for multi-stage switching of a compressed air flow between a feed pressure connection and a working line connection wherein a throttled compressed air flow can be switched in at least one switching stage by a throttle, wherein the pneumatic pilot control has a first control piston mounted in a first control chamber implemented in the valve housing and having a coaxial recess for forming a second control chamber in which a second control piston is mounted, so that an additive control pressure application to the control chambers generates a telescope-like deployment of a ram extending from the second control piston for generating a multi-stage switching stroke for the valve mechanism, in order to implement the throttled compressed air flow in at least one switching stage of the valve mechanism present between the closed and the open valve setting.

Abstract: A double action directional fluid flow valve includes a stepped piston connected with a poppet valve and moveable by a controller between open and closed positions by applying a continuous pressure to a small diameter piston face and selectively applying and removing pressure from a large diameter piston face to move the poppet valve between an open position and a closed position.

Abstract: The invention relates to a valve assembly for regulating the pressure of a pressure medium (2) of a pressure medium pump (3) to at least one first consumer (4), comprising a pilot-controlled pressure control valve (5), a main piston (6) acted on by the pressure medium (2), and a pilot piston (7), wherein a pressure chamber (8) between a piston back side (9) of the main piston (6) and the pilot piston (7) can be relieved, is characterized in that a relief valve (10) is connected in a fluid-conducting e manner to the pressure chamber (8), which valve opens when pressure medium pressure is present at the load sensor (LS), which represents an out-of-operation mode of the consumer (4), and recirculates pressure medium (2) having a low pressure to a pressure medium reservoir (II) or to the pressure medium pump (3), and the relief valve (10) closes, when the pressure medium pressure at the load sensor (LS) represents an in-operation mode of the consumer (4).

Abstract: The present invention is a water faucet device (2a) connected to pipes and buried in a mounting surface (W1), including: a water conveying portion main body (20) having an inflow-side connecting portion (20a), an outflow-side connecting portion (20b), and double pipe connecting portions (20c, 20d) respectively communicating with these; a push valve (30) opened and closed by a pushing operation; a valve receiving main body, positioned at a predetermined position relative to the mounting surface, and having double pipe joining portions (26a, 26b) slidably joined to a double pipe connecting portion in a direction approximately perpendicular to the mounting surface, and a push valve receiving recess (26c) for receiving the push valve; and a push button unit (10a) disposed on the mounting surface, furnished with a push button (12b) for pushing the operating portion of a push valve.

Abstract: Disclosed is a slow-acting ON/OFF valve which includes a valve-opening pressure chamber that makes an actuating member (which actuates a valve body that comes into contact with and moves away from a valve seat to close and open a flow passage) move in a valve-opening direction against a spring biasing force in a valve-closing direction, and supplies air to the valve-opening pressure chamber, in minute increments, via a flow rate regulation valve. In this slow-acting ON/OFF valve, the dead time from the receipt of a valve-opening signal to the commencement of a valve-opening operation is short. A manifold is provided independently of the valve-opening pressure chamber.

Abstract: A two-stage, slow-start valve includes a minor valve assembly inside a major valve closure member of a major valve closure assembly so that fluid can flow through the valve at a higher rate by opening the major valve assembly or at a lower rate by opening the minor valve assembly while the major valve closure assembly is closed in order to allow fluid to flow in an alternate flow path through the major valve closure member. The example minor valve closure assembly has a minor valve closure member that is actuated to open by a minor valve piston on which minor valve actuating fluid is applied to the minor piston via a diaphragm seal positioned between the minor piston and the minor valve actuating fluid. Both the major valve closure assembly and the minor valve closure assembly can be pneumatically actuated to open.

Abstract: The invention refers to a valve comprising a main nozzle arranged between inlet and outlet, and a pilot nozzle. The main nozzle has a main nozzle fit. It is sealed by a sealing body. The pilot nozzle has a pilot nozzle fit that can be sealed by a pilot nozzle body. A movable operating element arranged in the valve serves for opening and closing the main and pilot nozzle. When the valve is opened, first of all, the already accelerated operating element lifts the pilot nozzle body from the pilot nozzle fit.

Abstract: A percussion apparatus driven by a pressurized incompressible fluid includes a body with two coaxial bores for slidably mounting of a tool, and separately slidably mounting a striking piston having a stepped configuration. A control device varies a stroke of the striking piston between a long and a short stroke, and is connected to the directional flow valve and to a bottom chamber of the piston cylinder. The control device includes a cylinder in which a spool is mounted. A first face of the spool is situated in a first chamber permanently subjected to a determined pressure, and a second face of the spool is situated in a second chamber connected to the braking chamber for controlling the varying of the stroke of the striking piston.