Abstract: There is provided an apparatus for controlling fluid flow, comprising a first component for holding or conveying fluid, the first component having a port for the passage of fluid, a fluid passageway (18) from the interior of the first component to the exterior of the first component through the port, a contact valve (1) located in the fluid passageway (18), a second component having an abutment means, and connecting means for connecting the second component to the first component, the contact valve (1) comprising a first valve arm (8) extending into the fluid passageway (18), the first valve arm (8) being movable between an open position in which fluid flow through the fluid passageway (18) is substantially permitted, and a closed position in which fluid flow through the fluid passageway (18) is substantially prevented, wherein, when the second component is connected to the first component, the abutment means moves the first valve arm (8) into the open position.

Abstract: A pilot-controlled directional control valve, in particular a directional poppet valve, has a valve housing (10), at least three fluid connection points (12, 14, 16), a main control stage (18) and a pilot control stage. A further fluid-controlling intermediate stage (22) is arranged between the main control stage (18) and the pilot control stage (20). The main control stage (18) has a longitudinally movable main control piston (24). The pilot control stage has a longitudinally movable pilot control piston (26).

Abstract: Described herein are a valve assembly, an air vent assembly, an air release assembly, and a moisture detection assembly all suitable for use in connection with a wet pipe network. The valve assembly, the air vent assembly, the air release assembly, and moisture detection assembly are each configured to vent gas (e.g., air) remaining in a piping system when the system is filled with a fluid, and in particular, to vent air in a fire sprinkling system.

Abstract: A processing chamber is described having a gas evacuation flow path from the center to the edge of the chamber. Purge gas is introduced at an opening around a support shaft that supports a heater plate. A shaft wall around the opening directs the purge gas along the support shaft to an evacuation plenum. Gas flows from the evacuation plenum through an opening in a second plate near the shaft wall and along the chamber bottom to an opening coupled to a vacuum source. Purge gas is also directed to the slit valve.

Abstract: A device for regulating flow rate of a gas in a duct, the device including a valve member having an actuator, the valve member being configured in such a manner as to shut off the duct selectively, wherein movement of the valve member is controlled by the resultant firstly of pressure in the duct upstream from the valve member acting on a proximal surface of the valve member, and secondly of a control pressure applied to a distal surface of the valve member of area greater than that of the proximal surface of the valve member, the control pressure being established in an amplification chamber having a feed line and an emptying line, one of the feed and emptying lines presenting a flow rate that is constant and the other presenting a flow rate that is variable and that is controlled by an actuator.

Abstract: A valving arrangement is provided with a specially designed second fluid port which equalizes lateral forces induced upon a spool valve to greatly reduce or eliminate such forces and thereby virtually eliminate laterally induced ware upon the spool valve or a valve port.

Abstract: A medical pump, in particular an infusion pump for conveying a medium, includes a seating for a hose clamp which is separate from the pump and arranged on the hose. Two clamping portions of the hose clamp which can be moved relative to each other can be transferred into a closed relative position in which they pinch off the hose arranged therebetween in such a manner that it is not possible for any medium to flow through the interior of the hose. Moreover, the clamping portions can be moved with respect to each other into an opened relative position in which the hose arranged between the clamping portions is not pinched off, so that the medium is able to flow through the interior of the hose. The pump is distinguished in that a sensor is provided thereon, in particular in the seating for the hose clamp, which sensor detects at least when the hose clamp is received in the seating—whether their clamping portions are in the closed or opened relative position.

Abstract: A system and method is disclosed for storing a fluid in a storage vessel in liquefied form and delivering it in gaseous form to an end user through a supply line. The system comprises a pressure relief circuit for returning the fluid from the supply line to the vessel when predetermined conditions are met. The pressure relief circuit comprises a return line connected to the supply line and the storage vessel, a diversion line to divert the fluid elsewhere and a switching device operable to direct the fluid to either one of the lines, as a function of predetermined conditions.

Abstract: A method of controlling fluid pressure in a closed system including using a pressure regulating unit connected to the system, the unit including a first conduit fluidly connecting the closed system to an external system. A first regulating valve is interposed between the external system and one end of the conduit and a second regulating valve interposed between the closed system and the other end of the conduit. The method further includes: a) opening one of the first or second regulating valves; b) closing said one regulating valve; c) opening the other regulating valve; d) closing the other regulating valve; and e) repeating steps a) to d) in turn until the desired fluid pressure is achieved in the system.

Abstract: A compact inflator is described herein. The inflator may include a rotatable drum, an air pump disposed within the drum, a fixed securing mechanism that provides structural support to, and enables rotation of, the drum, a power supply, and an electric power transmission mechanism. The drum may draw in and let out a hose. The hose may have a first end and a second end, the first end having a connection mechanism that connects the hose to an inflatable object. The air pump may be connected to the second end of the hose. The power supply may provide power to the motor, and may be coupled to the pump or the power supply. The power transmission mechanism may include a slip ring assembly or a pair of parallel inductors, one which rotates with the drum about the other.

Abstract: A pressure relief vent includes a vent enclosure, a connector, and a pressure relief arrangement. The vent enclosure defines a vent interior volume and the connector is operable to connect the vent enclosure to an instrument requiring pressure relief. The vent enclosure has a proximal end and a distal end, with the connector being located at the proximal end. The pressure relief arrangement is operable to remain in a closed condition in normal operation, but move from the closed condition to an open condition in response to a predefined pressure differential so as to release pressure from the instrument. A vent opening device may be included with the pressure relief vent and is operable to move the pressure relief arrangement to the open condition or open a separate passage through the vent enclosure to the atmosphere responsive to a manual operation applied at the vent enclosure distal end.

Abstract: A flame mitigation device configured to be located proximate a main container opening of a fuel container having a fuel-receiving chamber, with the main container opening permitting liquid fuel to flow into and out of the fuel-receiving chamber. The flame mitigation device comprises a sidewall defining a plurality of perforations through which the liquid fuel can flow to dispense such liquid fuel from the fuel-receiving chamber when the flame mitigation device is installed within the fuel container. At least a portion of the perforations defined in the sidewall are downwardly sloping perforations, with the downward angle of the downwardly sloping perforations being at least 1 degree below horizontal. And at least 20 percent of the total open area defined by all of said perforations is attributable to downwardly sloping perforations.

Abstract: A retainer for retaining a check valve to a valve body includes a continuous body, a first group of projections, and a second group of projections. The continuous body is configured to engage a slot of the valve body to secure the continuous body to the valve body. The continuous body is further configured to include an opening configured to receive a portion of the check valve. The first group of projections is configured to extend radially from the continuous body. The first group of projections is further configured to contact the valve body to limit rotation of the retainer relative to the valve body. The second group of projections is configured to extend axially from the continuous body. The second group of projections is further configured to engage at least one of the check valve and the valve body.

Abstract: Booster valve (4) for pneumatic circuits, comprising: a hollow body (5), a pilot flow inlet/outlet gap (15) communicating directly with a control volume (16), an inlet/outlet gap (45) communicating with an actuator and communicating directly with an accumulation volume (29), a supplying gap (53) communicating directly with a supplying volume (38), a discharge gap (44), an amplified discharge shutter (25) which determines the sealing towards the discharge gap (44), a central device (43) comprising an amplified charge shutter (32) which determines the sealing towards the supplying gap (53), an activation piston (22) which, subjected to the pressure acting in the accumulation volume (29) and in the control volume (16), determines the movement of the amplified discharge shutter (25) or the amplified charge shutter, and having two separated and independent charge (47) and discharge (46); gain control devices which allow an independent adjustment between the charge and the discharge step and vice versa, and the cen

Abstract: A flexible, resilient, self-sealing slit-type valve (40, 140, 240, 340) is provided with a configuration that minimizes the difference between the pressure differential at which the valve opens and the pressure differential at which the valve (40, 140, 240, 340) closes. The valve (40, 140, 240, 340) includes a peripheral mounting portion (42) and a valve head (60, 160, 260, 360) connected thereto. The valve head (60, 160, 260, 360) has an interior surface (78, 178, 278, 378) and an exterior surface (76) which each has a recessed configuration such that the thickness between the exterior surface (76) and interior surface (78, 178, 278, 378) is thinner at the center on the longitudinal axis (62) of the valve (40, 140, 240, 340) than at a radially outward location.

Abstract: The present invention discloses an electric vacuum-pumping and tinfoil-cutting integrated machine. The integrated machine has a housing which comprises a fixed outer housing having an outer housing receiving cavity formed therein and a fixed inner housing having an inner housing receiving cavity formed therein, wherein a PCB and a battery are embedded in the inner housing receiving cavity of the fixed inner housing; and an electric tinfoil-cutting assembly is embedded on an upper end side of the fixed inner housing inside the outer housing receiving cavity of the fixed outer housing, and an electric vacuum-pumping assembly is embedded on a lower end side of the fixed inner housing inside the outer housing receiving cavity of the fixed outer housing. The present invention can achieve a vacuum-pumping function and a tinfoil-cutting function, and has the advantages of novel structural design, diversified functions and convenience in use.

Abstract: A valve stem and valve core assembly and a valve including a valve stem and valve core assembly. The valve stem and valve core assembly includes a valve stem and a valve core that sleeves the valve stem. The assembly includes an adjusting device arranged on the valve stem, and an elastic element arranged between the adjusting device and the valve core. A clearance exists between the valve core, the valve stem, and the adjusting device, so that the valve core can move relative to the valve stem, such that the valve can have a good closing performance.

Abstract: Pressure balancing apparatuses and methods disclosed here include embodiments with a waterproof enclosure having walls surrounding an interior chamber, a mounting interface mounted to the enclosure with a port to an outside, and a balancing module, connected to the mounting interface, the balancing module including, a balancing module housing, a valve actuator member inside the balancing module housing, with a receptacle for a pressure source. In certain embodiments the valve actuator member is configured to move in response to changes in differential pressure between a pressure in the enclosure chamber and pressure from the outside, and a module valve, inside the balancing module housing, connected to the valve actuator member, and fluidically separating the enclosure chamber from the port to the outside, wherein the module valve is configured to open and close in response to the movement of the valve actuator member.

Abstract: A valve includes a valve body forming a channel defining a fluid flow path extending from an inlet port to an outlet port of the valve body via a gallery disposed therebetween, an opening disposed in communication with the gallery, a valve assembly at least partially disposed through the opening and in the gallery, and a set pin having a central longitudinal axis. A valve disc of the valve assembly moves between a first position spaced from a valve seat of the valve body and a second position in contact with the valve seat. The set pin is coupled to and at least partly supported by the valve assembly to maintain the valve assembly in the first position. The fluid flow path allows a fluid to flow through the valve body in a first direction and a second direction opposite the first direction. The set pin is adapted to disengage a portion of the valve assembly when contacted by a fluid traversing the fluid flow path in the second direction, allowing the valve disc to move to the second position.

Abstract: Methods and gas flow control assemblies configured to deliver gas to process chamber zones in desired flow ratios. In some embodiments, assemblies include one or more MFCs and a back pressure controller (BPC). Assemblies includes a controller, a process gas supply, a distribution manifold, a pressure sensor coupled to the distribution manifold and configured to sense back pressure of the distribution manifold, a process chamber, a one or more mass flow controllers connected between the distribution manifold and process chamber to control gas flow there between, and a back pressure controller provided in fluid parallel relationship to the one or more mass flow controllers, wherein precise flow ratio control is achieved. Alternate embodiment include an upstream pressure controller configured to control flow of carrier gas to control back pressure. Further methods and assemblies for controlling zonal gas flow ratios are described, as are other aspects.