4236results about "Spindle sealings" patented technology

Implementations described herein protect a chamber components from corrosive cleaning gases used at high temperatures. In one embodiment, a chamber component includes at least a bellows that includes a top mounting flange coupled to a bottom mounting flange by a tubular accordion structure. A coating is disposed on an exterior surface of at least the tubular accordion structure. The coating includes of at least one of polytetrafluoroethylene, parylene C, parylene D, diamond-like carbon (DLC), yttria stabilized zirconia, nickel, alumina, or aluminum silicon magnesium yttrium oxygen compound. In one embodiment, the chamber component is a valve having an internal bellows.

A system and method for reducing wear to radial seals in a rotating control device. The seals may be cooled by a thermal transfer fluid circulating through a passageway making more than one pass. Also, the differential pressure between multiple seals may be regulated and lowered, thereby increasing seal life.

A valve packing assembly for a control valve includes a seal assembly, a loading assembly, and a packing retainer. The seal assembly has a seal component to provide a fluid seal around a valve stem and an anti-extrusion component to substantially prevent extrusion of the seal component about the valve stem. The loading assembly is configured to advantageously provide a predetermined packing stress to the seal assembly that is in the same direction as a process stress applied to the seal assembly by a process fluid, thereby substantially reducing packing friction and packing wear in the control valve assembly.

A valve actuator apparatus and method comprises an operator housing secured to a bonnet assembly. The bonnet assembly is secured to the valve body, and includes a bonnet stem movably within a bonnet housing for moving a gate within the valve body to open and close the valve. A downstop member is fixably secured to the bonnet stem and engages removable stem spacers which are added or removed to obtain a selected bonnet stem drift setting. The operator housing connects to a base ring that surrounds the bonnet housing and rotates to allow positioning of a fluid port in the operator housing. The operator housing may removed and replaced without altering the bonnet stem drift adjustment. A top shaft extends from the operator housing and rotates with respect to the bonnet stem to prevent torque transmission from the top shaft to the bonnet stem. A replaceable sealing cartridge sealingly supports the top shaft for axial movement within the operator housing.

A manifold valve according to the present invention includes a main body (1) and actuators (2, 3) each having a valve body (46, 47). The main body is formed with at least one set of a main flow passage-side valve chamber (17) and a secondary flow passage-side valve chamber (19) which are in communication with each other through a connecting flow passage (11), a branched flow passage (9) communicating with the main flow passage-side valve chamber, a-main flow passage (6) communicating with the main flow passage-side valve chamber through a main flow passage-side communication port (13) opening at a center of a bottom of the main flow passage-side valve chamber, and a secondary flow passage (7) communicating with the secondary flow passage-side valve chamber through a secondary flow passage-side communication port (15) opening at a center of a bottom of the secondary flow passage-side valve chamber. The main flow passage-side communication port and the secondary flow passage-side communication port are opened and closed by valve bodies (46, 47) of the actuators, respectively. Further, the connecting flow passage and the branched flow passage are structured such that bottoms thereof are substantially flush with those of the main flow passage-side valve chamber and the secondary flow passage-side valve chamber.

In an electromagnetic valve, a valve member is slidably installed in a housing to open and close a valve hole. A moving core is slidably installed in the housing, and a coil generates a magnetomotive force to attract the moving core to one side when it is energized. The valve shaft links a motion of the moving core with a motion of the valve member. A bellows surrounds the valve shaft to form a cylindrical inner space between the valve shaft and itself. The bellows is subjected to both positive and negative pressures to extend and shrink in accordance with the motions of the valve member and the moving core. An inner volume of the inner space increasing and decreasing in accordance with extending and shrinking operations of the cylindrical bellows portion. The opening of the bellows and the valve shaft form a narrow opening passage.

A valve for a ball includes a casing and a core. The core is arranged at least partially inside the casing. The core comprises a first sealing area with a plurality of sections which have alternating concave and convex curvatures.

A valve stem seal assembly includes a retainer and a sealing element disposed within the retainer. The retainer includes a step and one or more installation pads. The sealing element includes a first sealing lip for sealing a valve stem, and a second sealing lip for sealing a chamfer of a valve guide. The step of the retainer exerts a compression force, F, against the second sealing lip to seal the second sealing lip against the chamber of the valve guide. The one or more installation pads exerts a frictional force against the valve guide to prevent movement of said valve stem seal assembly. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).