The application relates to a rotary valve, in particular a multi-way regulating valve, with a housing, which has at least one inlet connection and at least one outlet connection for a liquid and/or gaseous medium, with at least one valve element, which is rotatably mounted in the housing between the connections in order to set at least one desired flow cross-section, and with a control shaft, which is non-rotatably connected to the valve element, which control shaft is led out of the housing with a coupling end, through an opening in a housing wall of the housing, wherein the control shaft has a radial projection, which has an axial stop for making axial contact with an annular sealing protrusion of the housing wall, and with at least one sealing element acting between the control shaft and the housing. It is provided that the annular projection of the control shaft has at least one axial recess on the end face thereof facing the housing wall, which axial recess extends over a limited circumferential section of the end face to the radial outer edge of the annular projection, and that a chamber is formed between the annular projection, the control shaft, the housing wall, and the sealing projection, in which chamber the sealing element is arranged.

A valve assembly (6000) for use with a valve body (7000) having a valve seat (7112) is disclosed, the valve assembly (6000) comprising: a cartridge (6200) threadably engaged with and extending away from the valve body (7000); a poppet (6500) slidably engaged with the cartridge (6200); a plate (6600) engaged with the poppet (6500); a plunger (6400) slidably engaged with the cartridge (6200) and slidably extending through the plate (6600); and a retainer (6450) captured between the plate (6600) and a surface of the poppet (6500), wherein the retainer (6450) is threadably engaged with the plunger (6400). The valve assembly (6000) can regulate fluid flow.

An apparatus for use in marine platform jacking is disclosed herein. In one aspect, a jetting valve includes a valve body with a piston assembly disposed therein. The piston assembly is selectively operated to open and close the valve. A biasing member is coupled to the piston assembly. The piston assembly includes a first piston and a second piston. The dual pistons, in cooperation with the biasing member, allow the valve to self-seal thereby preventing entry of a fluid which is external to the valve.

An apparatus for use in marine platform jacking is disclosed herein. In one aspect, a jetting valve includes a valve body with a piston assembly disposed therein. The piston assembly is selectively operated to open and close the valve. A biasing member is coupled to the piston assembly. The piston assembly includes a first piston and a second piston. The dual pistons, in cooperation with the biasing member, allow the valve to self-seal thereby preventing entry of a fluid which is external to the valve.

A valve includes at least one valve stem seal, such as a packing seal, that is included in a removable seal cartridge. The valve stem is connected to the actuator via a linkage, which can be removed to provide a linkage gap between the actuator and the valve stem. The seal cartridge can then be slid along the valve stem into the linkage gap and laterally removed from the valve, whereupon the seals within the seal cartridge can be refurbished. The valve can be a rotary or linear valve. In embodiments, the linkage gap can be increased by linear displacement of the actuator away from the valve stem. The seal cartridge can be re-installed in the valve after refurbishment, or a substantially identical replacement seal cartridge can be provided, and can be installed in the valve in replacement of the removed seal cartridge, thereby minimizing downtime of the valve.

A valve assembly for an engine includes a gas exchange valve, a valve guide, and a seal. The gas exchange valve includes a valve stem. The valve guide includes an outer surface having a stem seal retention surface disposed at a seal end thereof. The valve stem extends through the valve guide such that the valve is reciprocally movable over a range of travel along the longitudinal axis with respect thereto. The seal is mounted to the stem seal retention surface of the valve guide such that the seal is in running, sealing engagement with the valve stem. The stem seal retention surface includes a shoulder surface to help retain the seal.

A valve assembly for an engine includes a gas exchange valve, a valve guide, and a seal. The gas exchange valve includes a valve stem. The valve guide includes an outer surface having a stem seal retention surface disposed at a seal end thereof. The valve stem extends through the valve guide such that the valve is reciprocally movable over a range of travel along the longitudinal axis with respect thereto. The seal is mounted to the stem seal retention surface of the valve guide such that the seal is in running, sealing engagement with the valve stem. The stem seal retention surface includes a shoulder surface to help retain the seal.

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.

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.

An electric valve, comprising a stator assembly, a valve component, a valve body, a first sealing member and a sleeve; the stator assembly is located at the periphery of the sleeve and is limitingly connected to the valve body; the stator assembly is provided with a first recessed part, which is located between the valve component and the stator assembly; at least part of the opening of the first recessed part faces toward the valve body, and the first sealing member is located in the recessed part.