In a rotary drive with a housing that contains a piston, a lid and a bottom, screw thread-like guiding grooves in the piston, a shaft with a rotary axis that can be rotated around an axis of the rotary drive and that encroaches in the guiding grooves, and axially parallel torque supports that are attached in the lid and/or bottom and that are embedded in guidances in the piston, with each torque support having an approximately rectangular external cross-section with a load-specific design to support torques to be transmitted and having longer rectangle sides tangentially to the shaft and shorter rectangle sides approximately in directions towards the axis.

In a rotary drive with a housing that contains a piston, a lid and a bottom, screw thread-like guiding grooves in the piston, a shaft with a rotary axis that can be rotated around an axis of the rotary drive and that encroaches in the guiding grooves, and axially parallel torque supports that are attached in the lid and/or bottom and that are embedded in guidances in the piston, with each torque support having an approximately rectangular external cross-section with a load-specific design to support torques to be transmitted and having longer rectangle sides tangentially to the shaft and shorter rectangle sides approximately in directions towards the axis.

A valve actuation mechanism comprises a housing, an actuation pin rotatably mounted within the housing and at least one torque spring coupling the actuation pin to the housing for biasing the actuation pin from a first, inoperative rotational position towards a second, operative rotational position. The mechanism further comprises an actuation pin retaining element for selectively retaining the actuation pin in its first position, the retaining element being engageable with the actuation pin and the housing when the retaining element is in a retaining position so as to prevent rotation of the actuation pin towards its second position, and selectively disengageable from the housing to permit rotation of the actuation pin towards its second position. A locking element is provided for selectively preventing disengagement of the retaining element from the housing.

A valve actuation mechanism comprises a housing, an actuation pin rotatably mounted within the housing and at least one torque spring coupling the actuation pin to the housing for biasing the actuation pin from a first, inoperative rotational position towards a second, operative rotational position. The mechanism further comprises an actuation pin retaining element for selectively retaining the actuation pin in its first position, the retaining element being engageable with the actuation pin and the housing when the retaining element is in a retaining position so as to prevent rotation of the actuation pin towards its second position, and selectively disengageable from the housing to permit rotation of the actuation pin towards its second position. A locking element is provided for selectively preventing disengagement of the retaining element from the housing.

A passive explosion isolation valve (10) is provided that comprises vertically-oriented gate members (40, 42) configured to close automatically in response to an energetic event occurring downstream of the valve. The valve (10) may be optionally equipped with a valve seat cleaning assembly (46) configured to removed accumulated particulate material away from the area of the valve seat (48) and/or one or more latch assemblies (44) configured to secure the gate members (40, 42) in the closed position following closure of the valve (10) in response to an energetic event.

The invention discloses a valve element for an electronic expansion valve, which includes a rotor core and a hollow rotor cylinder sleeved outside the rotor core. Ribs and positioning grooves of a positioning device on the valve element are changed, so that the positioning grooves and an inner wall of a guiding section hole are stepped, an even thickness of the inner wall is maintained, and a working performance of the electronic expansion valve is improved.

A valve assembly includes a valve head. A valve stem extends from the valve head and into a drain bore in a housing. A first guidance retainer ring is mounted around the valve stem at a first axial location on the valve stem. A second guidance retainer ring is mounted around the valve stem at a second axial location on the valve stem spaced apart from the first axial location.

A valve assembly includes a valve head. A valve stem extends from the valve head and into a drain bore in a housing. A first guidance retainer ring is mounted around the valve stem at a first axial location on the valve stem. A second guidance retainer ring is mounted around the valve stem at a second axial location on the valve stem spaced apart from the first axial location.

An electronic expansion valve and an assembly method therefor. The electronic expansion valve includes a screw rod component, a movable connection component, a valve pin component and an elastic element. One end of the elastic element abuts the movable connection component, and the other end thereof abuts the valve pin component. In the period from the valve pin component closing the valve port part to the screw rod component moving a pre-set displacement amount in the valve closing direction, the elastic element does not generate an elastic force pushing the valve pin component towards the valve port part; and in the period from the valve pin component closing the valve port part to in a case that the screw rod component moving more than the pre-set displacement amount in the valve closing direction, the elastic element generates an elastic force pushing the valve pin component towards the valve port part.

A valve assembly includes a valve head. A valve stem extends from the valve head and into a drain bore in a housing. A first guidance retainer ring is mounted around the valve stem at a first axial location on the valve stem. A second guidance retainer ring is mounted around the valve stem at a second axial location on the valve stem spaced apart from the first axial location.