The invention relates to a fire extinguishing system valve (1), in particular wet alarm valve, dry alarm valve or spray water valve, comprising a housing (3) which has a fluid inlet chamber (9), a fluid outlet chamber (11) and a closing body (13) which can move back and forth between a blocking state and a release state, wherein the fluid inlet chamber (9) and the fluid outlet chamber (11) communicate directly with one another in a fluid-conducting manner in the release state, and the closing body (13) prevents the direct communication between the fluid inlet chamber (9) and the fluid outlet chamber (11) in the blocking state.

According to the invention, a housing (3) has a dedicated discharge duct (30) which has at least one inlet (30a, b) connected to the fluid outlet chamber (11) and an outlet (30c) leading out of the housing (3) of the fire extinguishing system valve (1), and which is integrated into the housing (3).

A rotary seal comprises a seal element comprising a disc-shaped body having a first axial side and an opposed second axial side. The seal element further comprises a radially inner central circular opening for receiving a rotary shaft, the opening having an inner periphery for sealing engagement with the shaft. A radially outer rim portion of the seal element comprises an axially facing annular sealing surface provided on the first axial side for sealing engagement in use with an opposed axially facing sealing surface of an adjacent first static housing and an axially facing pocket provided on the second axial side and having an axially facing surface for receiving, in use, an annular elastomeric biasing element. At least one drainage passage is formed through the outer rim portion from an inlet on the second axial side to an outlet on a radially outer portion of the rim portion.

An arrangement includes a field device with an on/off valve, a pneumatic actuator that moves the on/off valve, when applied with compressed air, into one on/off position and when ventilated into the other on/off position, a magnetic valve that applies compressed air to the actuator during electric actuation and ventilates the actuator during non-actuation and a function monitoring device that detects at least one parameter that refers to the movement of the on/off valve, where the function monitoring device includes a magnetic field sensor detecting changes to a magnetic field, where the magnetic field sensor is arranged in the region of the magnetic valve and generates a signal awakening the function monitoring device to detect the at least one parameter.

A trip cock valve for a brake system on a rail car includes a valve body that defines an inlet, a chamber downstream from the inlet, and an outlet downstream from the chamber. A piston is inside the chamber. A valve member operably connected to the piston has a first position that prevents fluid flow through the outlet and a second position that permits fluid flow through the outlet. A lever is operably engaged with the valve member to move the valve member from the first position to the second position. A valve position indicator downstream from the inlet is in fluid communication with the inlet when the valve member is in the second position.

A fluid control device, capable of detecting leaks even if the leaks is slight, is provided. The fluid control device includes a valve body in which the flow path is formed, a diaphragm isolating a closed space from the flow path, a bonnet forming the closed space between the diaphragm and providing a penetration hole connected to the closed space and penetrated to be able to vertically move a diaphragm retainer, the diaphragm retainer vertically moving in the penetration hole to press the diaphragm and providing an increased diameter portion not to be removed from the penetration hole, a pressure sensor detecting a pressure inside of the closed space, and an elastic body interposing between the increased diameter portion of the diaphragm retainer and the bonnet inside of the closed space and elastically expanding and deflating between the increased diameter portion of the diaphragm retainer and the bonnet as the diaphragm retainer vertically moves.

A diverter valve for an appliance such as a washing machine or the like provides a valve plate that can be moved by a DC motor both rotationally about an axis and axially along the axis to allow the valve plate to be retracted from engagement with a valve seat before rotation and reengaged after rotation permitting operation with a low-power DC motor.

A shut-off device for a fluid includes a housing conducting the fluid, an inflow opening provided in the housing, an outflow opening provided in the housing, a flow channel formed in the housing between the inflow opening and the outflow opening, and a blocking device arranged in the flow channel. The blocking device has a blocking body receptacle and a blocking body movable in the blocking body receptacle. The flow cross-section for the fluid in the blocking device, and thus in the flow channel, can be changed by moving the blocking body in the blocking body receptacle. A reliable detection of the position of the blocking body is ensured in that an ultrasonic measuring device is arranged in or aligned on the housing such that the position of the blocking body can be determined by means of the ultrasonic measuring device.

An ultrasonic flowmeter includes a measuring tube, a first transducer pair including first and second ultrasonic transducers, and a second transducer pair including third and fourth ultrasonic transducers. Each ultrasonic transducer is an ultrasonic transmitter and/or an ultrasonic receiver. The first transducer pair is on the measuring tube offset such that the respective transmitter transmits an ultrasonic signal in or against the direction of flow, and the receiver receives the ultrasonic signal. A course of the ultrasonic signal between the first and second ultrasonic transducers defines a first signal path. The second transducer pair is on the measuring tube offset such that the respective transmitter transmits an ultrasonic signal in or against the direction of flow. The receiver receives the ultrasonic signal transmitted by the transmitter. A course of the ultrasonic signal between the third and fourth ultrasonic transducers defines a second signal path.

A sectional valve includes a working valve and a control valve, which controls the working valve. In order to permit a greater flexibility with respect to possible settings and/or use or operation by comparison to known solutions, it is proposed, for example, that the control valve have a control spring (34, 34), which presses the anchor (5) onto the control valve seat (17), and against which the control coil (26) lifts the anchor (5) from the control valve seat (17), a permanent magnet (29), which in an actuation state is configured to hold the anchor (5) lifted from the control valve seat (17) by the core (35), and a magnet holder (28), in and/or on which the permanent magnet (29) is held in the actuation state, and which permits a distance from the permanent magnet (29), and/or that the control valve is configured to variably position the core (35) along a force generated by the control spring (34, 34).

In order to accurately judge whether or not there is a seat leakage in the first valve and the second valve in a short period of time, a fluid control apparatus comprises a fluid resistor arranged in a flow channel, a first valve arranged upstream of the fluid resistor, a first pressure sensor that measures a pressure in a first volume between the first valve and the fluid resistor in the flow channel, a second valve arranged downstream of the fluid resistor, a second pressure sensor that measures a pressure in a second volume between the fluid resistor and the second valve, a valve controller that controls the first or second valve, and a seat leakage judging part that judges whether or not there is a seat leakage in the valve valves based on the pressure sensors in a state where the valves are fully closed.