Abstract: A combination regulator valve for conveying fluid is disclosed. The valve comprises a bonnet, a body, a flexible diaphragm, a first spring, and a spindle unit. The spindle unit comprises a pin, a first seat disc, and a seat screw. The bonnet is secured to the body. The flexible diaphragm is compressed between the bonnet and the body. The first spring is disposed in the bonnet. The spindle unit is disposed in the body. The first seat disc is disposed between the pin and the diaphragm. The first seat disc and the pin define a first void. The first spring biases the diaphragm toward the first seat disc. The seat screw is engaged with the body and is slidably engaged with the pin. The seat screw and the pin define a fluid passage in fluid communication with the first void.

Abstract: Disclosed are weld electrode plugs with polymeric inserts for loss-of-cooling detection, methods for making or for using such weld electrode plugs, and electric welding systems equipped with loss-of-cooling detection plugs. A disclosed loss-of-cooling detection assembly includes a plug that attaches to the weld shank of a welding system such that the plug fluidly couples to a coolant bore within the shank. The plug includes a plug body with a clearance hole extending therethrough. An insert detachably mounts to the plug such that the insert fluidly seals the clearance hole. This insert is fabricated from a polymeric material, such as a shape memory polymer, that alters a physical property, such as shape/size, of the insert responsive to changes in temperature and/or pressure of coolant fluid in the shank's bore. When this physical property is altered, the insert unseals the clearance hole causing a detectable leak of fluid from the shank.

Abstract: Disclosed are subsurface safety valves having a reduced spread between opening and closing pressures. One safety valve includes a housing having a piston bore defined therein and configured to receive hydraulic fluid pressure, the piston bore providing an upper bore having a first diameter, a lower bore having a second diameter, and an intermediate bore interposing the upper and lower bores and having a third diameter, wherein the third diameter is greater than the second diameter and the second diameter is greater than the first diameter, and a piston assembly movably arranged within the piston bore and comprising an upper piston operatively coupled to a lower piston, wherein the upper piston sealingly engages the upper bore and the lower piston sealingly engages the lower bore, wherein, when the upper piston is arranged in the intermediate bore, the hydraulic fluid pressure acts on the lower piston.

Abstract: A controllable emitter of an irrigation apparatus including a drip line and a control station configured to control a pressure of pressurized fluid in the drip line is provided. The controllable emitter is disposable along the drip line and includes a container coupled to the drip line, the container being formed to define an interior and including an inlet through which the pressurized fluid is receivable in the interior from the drip line and an outlet through which the pressurized fluid is exhaustible from the interior, a piston, including a magnetic element, disposed at least partially in the container to occupy a position in accordance with the pressure of the pressurized fluid and a sensor configured to sense a position of the magnetic element and to communicate a sensed position to the control station.

Abstract: The invention relates to a device (6) for pressure-dependent opening of a suction intake (10), comprising a suction jet pump (11), comprising a feed line (12), an outlet line (13) and the suction intake (10); a valve body (15), displaceably arranged inside the feed line (12) in the delivery direction (14) of the suction jet pump (11) and having an effective area (16) exposed to the feed pressure of the suction jet pump (11); and a spring element (17), arranged between the feed line (12) and the valve body (15), for applying a force in opposition to the feed pressure inside the feed line (12); wherein the effective area (16) of the valve body (15), and the spring element (17) are designed so that the valve body (15) closes the suction intake (10) so that it is fluid-tight below a predefined pressure inside the feed line (12) and opens said intake when the predefined pressure inside the feed line (12) is exceeded.

Abstract: A pressure control assembly is provided that is coupled to a fluid regulator having a regulator body, an actuator, and an exhaust vent. The actuator includes an actuator housing, a diaphragm disposed within the actuator housing, a first chamber defined adjacent a first side of the diaphragm, and second chamber defined adjacent a second side of the diaphragm. The exhaust vent is formed in the actuator housing to fluidly couple the first chamber to the atmosphere. The pressure control assembly includes a flexible element positioned within an orifice of the exhaust vent. The flexible element is movable within the orifice in response to changes in the pressure in the second chamber.

Abstract: A back pressure valve comprises a pressure regulator housing affixed to a pressure controller housing and a diaphragm disposed between the pressure regulator housing and the pressure controller housing. In one aspect, the back pressure valve includes a valve member moveable between a fully open position and a fully closed position. The pressure regulator housing includes an inlet chamber communicating with an outlet chamber through at least one fluid passage in a sleeve. The valve member includes a stem connected to a valve head. The valve head includes an outer surface that is received and guided during movement by an inner surface of the sleeve. Upper and lower outer surface of the valve head provide stability to the valve member during opening and closing of the back pressure valve.

Abstract: In various embodiments, an electronic flow selector of a fluid flow control system may be used to select a flow rate of a fluid. When the system is in an electronic mode, an encoder may electronically encode the fluid flow selection. A controller may receive the electronically encoded flow selection and transmit a corresponding control signal to an electronic valve to allow the fluid to flow at the selected flow rate. When the system is in a manual mode, mechanical backup flow selectors may be used to directly control the flow rate of a fluid. When the system is in a manual mode, the mechanical backup flow selectors may be in a deployed position. When the system is in an electronic mode, the mechanical backup flow selectors may be in a retracted position. Particular applications to gases and anesthesia delivery are disclosed herein.

Abstract: A laser block assembly (LBA) gas fill process device with improved cathode electrode connectors. An example device includes a gas fill component that attaches to an LBA under test and electrical connectors that receive a voltage bias from a voltage source and apply the voltage bias to cathodes of the LBA. The electrical connectors include an end having a torsion spring that is sized based on the cathodes of the LBA. Also, the electrical connectors may include a strain relief spring.

Abstract: The safety valve comprises a body and an obturator movable in the body between a closed position (FIG. 2) and an open position (FIG. 3). It also comprises means for displacing the obturator in order to displace it towards its closed position when the pressure of the fluid is lower than a threshold value, and the displacement means comprise: a piston for driving the obturator towards its open position, the piston being in contact with the pressurised fluid when the obturator is in the open position, and means for returning the obturator towards its closed position. Application, for example, to pneumatic machining machines.

Abstract: An air turbine starter is provided that includes a check valve assembly for placement between a first environment, at least a portion of which is at a first pressure (P1), and a second environment, at least a portion of which is at a second pressure (P2), wherein the difference between the first and second pressures generate a pressure force (Fp). The check valve assembly comprises a valve element disposed between the valve seat and the valve body, the valve element capable of being acted upon by a gravitational force (Fw), a viscous force of the fluid to be communicated between the gearbox assembly and the starter housing (Fv), a buoyancy force of the valve element (Fb), and the pressure force on the valve element (Fp), the valve element further configured to translate axially to a closed position when P2<P1 and Fw<Fv+Fb+Fp.

Abstract: A device for preventing the unintentional restarting of motors or machines is proposed, it being possible to control the supply of energy to the motor or to the machine by means of a control valve with a mechanically adjustable control element and it being possible to connect the control valve non-detachably to the motor or to the machine, the energy for the motor being generated by means of compressed air, and in that a pneumatic piston, to which the primary air pressure prevailing upstream of the motor and upstream of the control valve can be applied, being arranged as a restarting inhibitor between the control valve and the motor, and in that, in order to apply the primary air pressure, a connecting line being arranged between the motor and the piston.

Abstract: A hydraulic automatic shutdown valve system is described to minimize the cost and clean up associated with hydraulic fluid spills. The valve system senses a pressure drop in a fluid system and diverts fluid away from the failed area of a pressurized hydraulic system.

Abstract: A hydraulic safety valve adapted to cut or divert the flow of pressurized fluid A hydrau/sudden rupture occurs in the hydraulic system. The valve has a valve body with an inlet port, first and second outlet ports and a sump port. A first valve member controls the inlet port and directs fluid to one of the out let ports and a second valve member disposed within the valve which blocks the sump port when the valve is in operating position and directs the flow of pressurized fluid into the sump when the system pressure fails.

Abstract: A surface pipeline safety valve having a tubular member telescopically movable in the housing for controlling the movement of a valve closure member, a rod piston and cylinder assembly contacting and moving the tubular member in response to pressure in the bore of the housing in which the second side of the assembly is in communication with the atmosphere. High and low pressure responsive mechanisms for closing the valve. Seals in the assembly and high and low pressure responsive mechanisms are replaceable from the exterior of the housing.

Abstract: A coolant system and control valve used in a circuit for cooling spot welding tips. The control valve normally passes coolant to and from the tips. Should a break in the coolant flow occur because of a breakdown of one or more of the tips, the control valve will shift to close the normal coolant loop and divert coolant from a pressure source to a tank until a repair is made. A switch indicator can be utilized for visual observation of a break and also a flow indicator is provided on the valve body to indicate normal coolant flow.

Abstract: A valve for controlling the flow of a liquid coolant in a circuit interconnecting several hollow welding electrodes with a pressurized coolant source has dual ball check valves in the supply and return lines respectively and a spring and pressure responsive device for holding the ball check valve in the supply line open when the fluid pressure of the coolant in the cooling circuit is maintained. The device is responsive in operation to loss of pressure in the coolant supply line and the hollow electrodes to permit the dual ball check valves to close upon a loss of pressure as occasioned by the burn out of one of the electrodes or the removal of the electrode from the circuit. The device may also originate an appropriate signal which may be directed to a remote electrical switch controlling the welding current.

Abstract: A solar collector system wherein water is continuously circulated between collector units and a reservoir and the conduits between the reservoir and the collector units are free of valves and like restrictions for enabling full drainage of the system when water is not being pumped through the system. Circulation is established by an initially operating large capacity pump to charge the system with water, and a small capacity pump takes over the maintain circulation after the system is charged, pump operation being controlled by the temperature of water in the system heated by the sun.

Abstract: A well safety valve adapted to be positioned in a well tubing and close on either a predetermined high tubing pressure or a predetermined low tubing pressure. The valve closure member in the valve body moves between an open and closed position in response to longitudinal movement of a tubular member. The tubular member has an open bore for alignment with the bore of the well tubing to provide straight through flow through the safety valve. In addition, the tubular member has a plurality of telescoping sections and releasable and resettable locking means normally securing the plurality of sections together. A predetermined high tubing pressure or a predetermined low tubing pressure acting on the tubular member causes the valve to close.

Abstract: A pressure operated shut-off valve for controlling a pneumatic circuit for instance a supply passage of a pneumatic tool, in response to the motive air supply pressure. The valve comprises a valve body that is continuously biased in its closing direction by a spring means and in its opening diection by the motive air supply pressure. If the air pressure drops below a predetermined minimum value the valve is automatically shifted to a closed position by the load of the spring means. A valve body controlled passage means supplies pressure air to the rear end of the valve body as the latter occupies its closed position, thereby making the closed position stable.

Abstract: A low pressure shutoff valve adapted to be interposed in the fluid supply conduit of a fluid operated torque tool comprises a piston closure member having opposed differential pressure faces exposed to fluid supply pressure and a coil spring for biasing the piston toward a fluid shutoff position. The piston is disposed in a chamber which may be vented by actuating an axially slidable sleeve on the exterior of the valve body whereby the valve is opened to supply pressure fluid to the tool as long as the fluid pressure is greater than a predetermined minimum value.