A switching valve includes a valve head having a plurality of connection ports connecting a pipe, a rotor accommodated therein and including a groove for connecting the connection ports, and a rotor shaft holding the rotor and rotatably equipped, and a driver having a holder holding the valve head and a motor rotating the rotor shaft of the valve head held by the holder. Further, the valve head is provided with a home position sensor detecting a reference position in a rotation direction of the rotor shaft, and a teaching information holder holding information on a relative positional relationship between the reference position and a position of the rotor shaft when the rotor is at a predetermined position, and the reference position acquired using the home position sensor.

The invention is directed to an indicator (22) of the opening and/or closing status of a device controlling the flow of a fluid, such as a tap or a pressure reducer for compressed gas, comprising a sleeve-shaped support (24) to rotatably engage with a protruding portion (18) of a body of the device and from which an actuating spindle (20) extends along a longitudinal axis of said device; an indicator sleeve (26) axially sliding along the support (24); a rotor (28) to be fixed to the spindle (20) and comprising at its periphery a least one track (32) with a curved profile; and at least one track follower (30) extending radially from the indicator sleeve (26) through a longitudinal slot (242) in the support (24) and engaging with the at least one track (32).

The invention relates to an automatic cylinder changeover device (1), comprising two gas inlets for mounting gas cylinder banks, namely the left gas inlet and the right gas inlet, a gas outlet through which gas may be discharged and a valve suitable for connecting said left gas inlet or said right gas inlet with the gas outlet and configured for automatically reversible switching between these two connections, characterized in that the device (1) comprises an indicator, suitable for being manually set in one of two distinct positions, one of said positions indicating the left gas inlet and the other of said positions indicating the right gas inlet and comprises means for detecting the position of the indicator, including at least one sensor (5), preferably a pair of sensors (5). The invention also covers a method for monitoring a gas installation equipped with such automatic cylinder changeover device.

A magnetic sensor arrangement for determining a position of an actuator may include a magnetic sensor to determine the position of the actuator, where the actuator may be configured to reciprocate along a longitudinal axis of an actuator housing of the actuator, such that at least a portion of the actuator may cross an end plane of the actuator housing when reciprocating along the longitudinal axis, and the magnetic sensor may sense a set of components of a magnetic field generated by a magnet, and determine, based on the sensed set of components of the magnetic field, a position of the actuator along the longitudinal axis of the actuator housing of the actuator, where the magnet may be connected to or forms part of the actuator, and where the magnetic sensor may be connected to the actuator housing, and where a portion of the magnetic sensor may be positioned at least in a first actuator position beyond the end plane of the actuator housing.

An adjustable pressure valve has a valve body, an inactive cap and an active cap. The inactive cap is mounted in the outlet of the valve body, abuts against the piston in the valve body and has an inclined edge. The active cap is mounted rotatably against the inactive cap and has an inclined edge abutting against the inclined edge of the inactive cap. When the active cap is rotated relative to the inactive cap, the inactive cap is pushed by the inclined edge of the active cap to slide inwardly or outwardly. Then the elastic element in the valve body is compressed more or less by the slide of the active cap to adjust the preset outlet pressure without disassembling the adjustable pressure valve.

An illustrative damper system includes a damper blade that is configured to be positioned within a duct, such as a bypass duct of an HVAC system. A shaft is in communication with the damper blade, a torsion spring is in communication with the shaft, and a force adjustment mechanism is in communication with the torsion spring. The shaft, the damper blade, and the torsion spring may be configured such that the shaft may affect movement of the damper blade about a rotation axis and the torsion spring may provide a bias force to the shaft for biasing the damper blade toward a desired position (e.g. closed position).

The present discloses valve systems that include valve shift detection systems that can be employed to determine when a valve has shifted. In certain embodiments, the valve shift detection systems include a switch integrated into a valve block that may be closed upon shifting of the spool valve. In certain embodiments, the switch may include a component that completes a circuit upon contacting the valve. The valve shift detection systems also may include a controller designed to detect a voltage or current change produced by completing the circuit.

A withdrawal system (1) for a container (2) and comprises an immersion pipe (4) mounted on and projecting into the container (2) as well as a withdrawal head (5) that is attachable to the immersion pipe (4) by means of a rotary connection. The withdrawal head (5) attached to the immersion pipe (4) is secured by means of a mechanical locking unit.

The invention provides an electrically operated valve which can more accurately detect a position of a valve body. An electrically operated valve is provided with a valve shaft, a valve body, a rotor member which is movable together with the valve shaft in a parallel direction to a first direction, a stator member which applies a turning force to the rotor member, a permanent magnet member which turns together with the rotor member, an angle sensor which detects an angle of rotation of the permanent magnet, and a guide member which guides a relative movement of the rotor member or the valve shaft in relation to the permanent magnet member. A distance between the permanent magnet and the angle sensor is fixed when the permanent magnet member turns.

A device for filling air conditioning systems with a refrigerant during final vehicle assembly, wherein the air conditioning system comprises a connection valve on its low and high pressure sides, via which the air conditioning system can be pressure tested, evacuated, and filled, which facilitates maintenance operations in the life cycle of the system, wherein said connection valves have different geometrical contours between the high and low pressure side and to ensure that only the respective approved refrigerant is filled into the air conditioning system, and wherein the filling is performed using a filling system brought via adapters into an operative connection with the connection valves on the low and high pressure sides. The device is designed to allow filling with two different refrigerants using just two adapters and still ensures that a proper refrigerant is filled into the respective air conditioning system.