An electric valve and an assembly method therefor. The provision of multilayered sealing of a first sealing element, a second sealing element, and a sealing medium located between the first sealing element and the second sealing element along the axial direction of a valve stem is conducive to restricting outward leakage of a fluid along the axial direction of the valve stem.

A fluid control valve includes a seal member. The seal member includes a cylindrical portion and a flange portion. The flange portion extends radially outward from one end of the cylindrical portion. A valve shaft is inserted in the cylindrical portion. The flange portion is supported between a filter and a plug in a state in which the flange portion is pressed against the plug.

A control valve includes a valve body and a valve core. The valve core includes a top plate, a bottom plate, a first stop block and a valve core shaft assembly. The valve core shaft assembly includes a transmission connection part. At least part of the transmission connection part is position on the side of the top plate away from the bottom plate. The first stop block is fixedly connected to the top plate to form an integrated structure. The first stop block extends from the top plate in a direction away from the bottom plate. The valve body further includes a top wall part and a second stop block that are positioned at one end in the height direction of the side wall part. The top wall part and the side wall part are integrally formed. The top wall part is provided with a through hole.

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.

A flap device for controlling a gas flow through a pipe comprises a flap that is rotationally fixedly connected to a flap shaft and at least one support unit by means of which the flap shaft is rotatably supported. A radial hollow space that is bounded in an axial direction by respective attachment surfaces is formed between the flap shaft and a reception section of the support unit. A damping element composed of an elastic material is clamped in the hollow space with axial and/or radial deformation and/or preload.

A valve (10) in accordance with an embodiment of the present invention includes a body (1) having a space in which a stem (3) and a ball (4) are housed, wherein an inner lid body (60) fixing the ball (4) in the space liquid-tightly partitions the space into a part in which the stem (3) is housed and a part in which the ball (4) is housed.

A connection socket for a tubular connection that includes: a socket cup having a metal alloy composition and a sealing portion, the sealing portion comprises a primary and a secondary sealing recess; a primary seal positioned within the primary sealing recess, the primary seal comprising an elastomeric material having a service temperature, and a secondary seal positioned within the secondary sealing recess, the secondary seal comprising a metal composition. Further, the secondary seal has a melting temperature at or above the service temperature of the primary seal.

A valve and stem sealing assembly capable of preventing leakage under demanding environmental and operating conditions. The valve comprises a body and bonnet secured together to house a flow-element, stem, and stem sealing assembly. The body may contain a body joint encapsulated within its liner. The flow-element is positioned between a first port and second port on the valve. The body and bonnet may be configured to eliminate rotational forces from being translated to the bonnet. The stem sealing assembly comprises a primary seal, primary shaft insert, spacer, and force transmitting member. The stem sealing assembly may also comprise a secondary seal and secondary shaft insert. The stem seal assembly is substantially adjacent to the stem, and configured to fit within an annular space or cavity between the stem and the first body half, second body half, and bonnet. The valve may also include a leak detection port.

A fluid control valve includes a seal member. The seal member includes a cylindrical portion and a flange portion. The flange portion extends radially outward from one end of the cylindrical portion. A valve shaft is inserted in the cylindrical portion. The flange portion is supported between a filter and a plug in a state in which the flange portion is pressed against the plug.

A valve (10) in accordance with an embodiment of the present invention includes a body (1) having a space in which a stem (3) and a ball (4) are housed, wherein an inner lid body (60) fixing the ball (4) in the space liquid-tightly partitions the space into a part in which the stem (3) is housed and a part in which the ball (4) is housed.