Abstract: An injection valve assembly includes a valve body having a central longitudinal axis and a cavity with fluid inlet and outlet portions, a valve needle axially movable in the cavity to control a fluid flow through the fluid outlet portion. The valve needle includes a radially extending retainer element. An electro-magnetic actuator unit including an armature axially movable in the cavity and designed to actuate the valve needle via the retainer element, and a pole piece fixedly coupled to the valve body and including an inner recess, the retainer element being at least partially arranged in the inner recess. The pole piece includes a stop element extending radially into the inner recess of the pole piece. The stop element has a stop surface facing the fluid outlet portion and the retainer element. The stop surface of the stop element limits the axial movement of the retainer element.

Abstract: A valve includes a valve body including a main passage defining a first volume and a second volume. The valve also includes a valve spool moveable relative to the valve body. The valve spool includes a central vent passage capable of fluid communication with each of the first volume and the second volume. Air flows between the first volume and the second volume through the central vent passage as the valve spool moves relative to the valve body and as the valve changes between an actuated position and a non-actuated position.

Abstract: A control program for a positive displacement metering system measures the time required for the travel of a free piston in a cylinder of known volume to determine an average flow rate during a full stroke of the piston. The system may also measure and record the inlet and outlet pressures or the differential pressure between the fluid inlet and outlet. The control program positions a four-way valve which may function as an adjustable metering orifice in response to the measured average flow rate and/or changes in the inlet and outlet pressures to achieve the desired flow rate. At the end of each stroke, the four-way valve is repositioned to reverse fluid flow through the metering cylinder. The system may revise the valve position settings for both forward and reverse strokes based on the measured time required for a full stroke at a certain valve position. In this way, the system automatically and iteratively compensates for changes in fluid properties and fluid pressure.

Abstract: The present invention provides a pressure reducing valve. The pressure reduction valve includes a main body, an inlet, an outlet, a stem, a main seat, a pilot diaphragm, a main head, and a control spring. The pressure reduction valve includes additional auxiliary seats with corresponding auxiliary heads and displacement members/surfaces. The pressure reduction valve additional includes auxiliary seats with corresponding auxiliary heads and displacement members/surfaces enables stage wise opening of the secondary seats and the main seat. This enables to meet highly varying media flow demands using single pressure reduction valve, having less hunting effect and eliminating use of multiple pressure reduction valves.

Abstract: A method and apparatus for self-calibrating control of gas flow. The gas flow rate is initially set by controlling, to a high degree of precision, the amount of opening of a flow restriction, where the design of the apparatus containing the flow restriction lends itself to achieving high precision. The gas flow rate is then measured by a pressure rate-of-drop upstream of the flow restriction, and the amount of flow restriction opening is adjusted, if need be, to obtain exactly the desired flow.

Abstract: A valve device is attached to a fuel tank. The valve device includes a case including a vent valve port communicating outside of the tank at an upper portion, and including an inflow portion for a fuel below the vent valve port; and an upper floor body inside the case and rising by the fuel flowing into the case to be seated in the vent valve port. In a face portion facing a bottom portion of the upper float body in the case, an elastic piece is formed by a first arc-shaped split groove such that a center side of the face portion becomes a curvature inner side, and a second arc-shaped split groove formed such that a center of the face portion becomes a curvature inner side outside the first arc-shaped split groove. One portion of the elastic piece abuts against the bottom portion of the upper float body.

Abstract: The invention relates to an inerting device for a pressurized aircraft fuel tank, i.e.

Abstract: A pilot-controlled pressure control valve is disclosed. The pilot-controlled pressure control valve has a pilot control stage, a spool valve, and an overload spring. The pilot control stage includes a pilot control piston which has a pilot control spring. The pilot control spring acts in a closing direction of the pilot control stage. The pilot control spring is supported on the spool valve which can be positioned by a control pressure against the force of the overload spring. The control pressure is configured to set a preload of the pilot control spring. At the same time, in a loaded position, in which the pilot control valve has minimum preload, the spool valve rests against a stop. A preload of the overload spring and a position of the stop can be set independently of one another.

Abstract: A plumbing fixture includes a touchscreen user interface on a surface of a plumbing fixture. The touchscreen user interface is configured to allow a user to control at least one of the temperature or flow rate of a fluid exiting the plumbing fixture by controlling a mixing valve located within a body of the plumbing fixture.

Abstract: Non-contact torque, thrust, strain, and other data sensing of a valve actuator or valve is disclosed. A sensor may include a surface acoustic wave device.

Abstract: A steam trap system is provided which can improve efficiency of sensor assembly and air-tightness. The steam trap system includes: a housing that includes a feeding hole for feeding steam, a discharging hole for discharging condensate water, and an opening; at least one sensor that is disposed inside the housing via the opening; an insulation member that is disposed in the opening to maintain air-tightness and to which the sensor is fixed to expose a terminal; and a cover that is disposed in the insulation member to cover the terminal.

Abstract: There is provided a differential pressure type flowmeter that includes an orifice provided in a main flow channel, a first pressure sensor configured to detect pressure of fluid on an upstream side of the orifice, a second pressure sensor configured to detect pressure of fluid on a downstream side of the orifice, a first pressure introduction flow channel configured to guide the fluid on the upstream side of the orifice to the first pressure sensor, and a second pressure introduction flow channel configured to guide the fluid on the downstream side of the orifice to the second pressure sensor, wherein a flow channel length and a flow channel diameter of the first pressure introduction flow channel coincide with those of the second pressure introduction flow channel, respectively, and a ratio of the flow channel length to the flow channel diameter is not less than 20 times and not more than 30 times.

Abstract: A control valve actuator assembly having internally configured pressure transducers and associated pressure channels internally integrated within the yoke of the actuator assembly.

Abstract: A pressure type flow control system with flow monitoring includes an inlet side passage, a control valve comprising a pressure-type flow control unit connected downstream of the inlet side passage, a thermal-type flow sensor connected downstream of the control valve, an orifice installed on a fluid passage connected downstream of the thermal-type flow sensor, a temperature sensor provided near the fluid passage between the control valve and orifice, a pressure sensor provided for the fluid passage between the control valve and orifice, an outlet side passage connected to the orifice, and a control unit comprising a pressure-type flow rate arithmetic and control unit to which a pressure signal from the pressure sensor and a temperature signal from the temperature sensor are input, and which computes a flow rate value of fluid flowing through the orifice, and outputs a control signal to a valve drive unit of the control valve.

Abstract: An apparatus for detecting wear in a flush valve includes at least one programmed controller. The flush valve comprises at least one pressure sensor and a valve element, and operates when an internal pressure causes the valve element to open. The controller is programmed to record at least one water pressure detected within the flush valve with the at least one pressure sensor after at least one operation of the flush valve, record a water pressure detected within the flush valve after a subsequent operation of the flush valve, and determine if the flush valve is faulty based at least partially on a comparison between the at least one water pressure detected after the at least one operation of the flush valve and the water pressure detected after the subsequent operation of the flush valve.

Abstract: A flow rate controller is disclosed that maintains constant flow rate with changes in pressure drop across the valve by maintaining a constant pressure drop across a restrictor with the aid of a spring balanced piston that mates a cone to a seat to dissipate the majority of pressure drop across the valve.

Abstract: A pressure regulator (100) is provided. The pressure regulator (100) includes various features that reduce the risk of internal leaking The pressure regulator (100) includes a regulator body (101) including a fluid inlet (107) with a valve seat (106) and a fluid outlet (108) and a cap (102) coupled to the regulator body (101). The pressure regulator (100) also includes a diaphragm (103) with a first side (103a) exposed to the fluid inlet (107) and the fluid outlet (108) and a second side (103b) exposed to the cap (102). The diaphragm (103) can frictionally engage the regulator body (101) to form a fluid tight seal. Additionally, the diaphragm (103) may include a socket (118) formed in the diaphragm (103) and a valve member (105) including a valve stem (110) with a ball (118) that is adapted to engage the socket (118) formed in the diaphragm (103) in order to couple the valve member (105) to the diaphragm (103).

Abstract: A solenoid valve assembly includes an armature having a longitudinal axis and an ovular cross-section, the armature being moveable along the longitudinal axis from a first position to a second position, and a bobbin including a solenoid coil configured to electromagnetically move the armature when energized. The bobbin defines a recess also having an ovular cross section for receiving the armature and restricting lateral movement of the armature, thereby providing a linear actuation path for the armature along the longitudinal axis. A flux coupler and a flux bracket form a magnetic circuit with the bobbin to electromagnetically move the armature. The flux bracket has a pole piece with a commensurate ovular cross-section that limits the movement of the armature along the longitudinal axis, thereby determining a stroke length of the armature. During manufacture, the flux bracket, and therefore the pole piece, are moved relative to the flux coupler to set the stroke length.

Abstract: An apparatus for dividing and supplying gas is provided with a flow rate control device, a plurality of divided flow passages of gas flowing from the flow rate control device, thermal-type mass flow sensors disposed to the divided flow passages, electrically-operated valves disposed on a downstream side of the thermal-type mass flow sensors, controllers that control the electrically-operated valves, and a flow ratio setting calculator that calculates a total flow rate, then calculates flow rates of the divided flow passages, and then inputs the calculated flow rates as set flow rates to each controllers. One of the divided flow passages with the highest set flow rate is put in an uncontrolled state, and opening degree for each of the rest divided flow passages is controlled, and then feedback control of the divided flow rate of each of the divided flow passages is implemented by each of the controllers.

Abstract: A pressure reducing valve comprises an open-close valve and a piston. The open-close valve makes switching between connecting and isolating a primary port and a secondary port. The piston makes sliding motion inside the cylinder according to a difference between force applied from the pressure regulating chamber and force applied from the pressure reducing chamber, thereby opening and closing the open-close valve. The open-close valve includes a valve stem and a valve seat fixing member. The valve seat fixing member restrains displacement of the piston toward a side upstream of the open-close valve by abutting on an end surface of the piston. The valve seat fixing member includes a channel hole communicatively connecting a housing part for the valve stem and the pressure reducing chamber.