Abstract:
A gate valve comprising a first part (10), a second part (12), and inlet/outlet parts (14), wherein the first and second parts define a cavity in the body and where a wedge (18) is movable in said body. The gate valve comprises guiding objects (22; 22’) on generally opposite sides of the wedge for guiding said wedge movement, where a major part of each guiding object is accommodated in the first part, and a portion of the guiding object extends into a region of the cavity defined by the second part, thus essentially overlapping an area of said part. The guiding objects may be releasably mounted or be integral with the valve housing upper part. A sealing insert (20) for the gate valve comprises a region which under normal conditions is exposed to the water flowing through the valve, and a rigid skeleton (30) element covered by a resilient material to such an extent that said region of the sealing insert which under normal conditions is exposed to the water flowing through the valve, is substantially covered by said resilient material.
Abstract:
A gate valve assembly, which may be used to seal a semiconductor processing chamber to isolate the chamber and/or maintain pressure or vacuum therein. The invention includes a gate (304) coupled to a linear axial shaft (310). The axial shaft is driven using a single action actuator (326). The gate of the present invention has an inclined surface to the shaft. Because the surface is inclined, the gate can be forced by the movement of the axial shaft against a similarly inclined gate seat surface. The angled surface translates the axial sealing force provided by the axial shaft into a positive lateral sealing force without the need for lateral movement of the gate.
Abstract:
A wedge gate valve (10) having a valve body (12) defining a valve chamber (20) and flow passages (18, 19) and upwardly diverging circular seat surfaces (28) of circular, flat configuration and defining seat planes. A valve disk or wedge (32) having downwardly converging sealing surfaces (34) is movable within said valve chamber between open and closed positions for controlling flow through the valve. Pressure boundary plates (60) connected by hubs (63) to the valve disk define the sealing surfaces of the disk and have bottom corners that establish line contact with the downstream seat surface and prevent any portion of said sealing surfaces of said valve disk from crossing the sealing plane of the downstream seat in the event of flow responsive downstream movement of the valve disk during its opening and closing movement.
Abstract:
The invention relates to a valve provided with a housing which is to be arranged in a pipe and which has arranged therein a channel and a valve body which is movable between a position opening and closing the channel. In the closing position the valve body co-acts with a seat arranged in the housing, which seat is arranged in the housing by means of a clamping connection and is thereby simple to release for maintenance purposes. The seat and the housing can herein be conical. For clamping of the seat in the housing or release thereof from the housing the valve is further provided with movable ejecting elements and clamping elements which can be formed in each case by a double-action jack.
Abstract:
Apparatus configured to remove and/or introduce a component from or to a pipeline, whilst the pipeline is under pressure comprises a fluid tight coupling adapted to couple the apparatus to a part of the pipeline, a valve having open and closed configurations coupled to the coupling, an elongate body for receiving a component of the pipeline, the elongate body couplable to the valve, a tool for engaging the component of the pipeline and lifting means for raising and lowering the tool with-in the elongate body.
Abstract:
Valve wedge (11) for a slide valve (1) comprising a rough cast metal wedge core (13) encapsulated in, i.e. coated with, a soft seal encapsulation (50) and having two guide members (20) projecting transversely in opposite directions. Each of the guide members (20) comprises a sideways projecting rib (17) of said rough cast wedge core and a prefabricated wear and corrosion-resistant slide shoe arranged thereon, each rib (17) comprises laterally opposite lateral surfaces (19) and each shoe comprises two opposite lateral walls (22) with inner surfaces (27). Each shoe (23) is fixedly vulcanized to the respective one of the ribs (17) by means of soft seal encapsulation (50) present between the rough cast wedge core (13) and the shoe (23). The outer lateral surfaces of the ribs are finished surfaces (19) and that the opposite inner surfaces (27) of each of the slide shoes (23) is laterally rigidly supported by the corresponding outer lateral surfaces (19) of the respective one of said ribs (17) so that each rib laterally rigidly supports the respective one of said slide shoes (23).
Abstract:
A valve body (12) defines a fluid passage (15) and a valve sealing body (100) is positioned there. The valve sealing body is operable between open and closed positions which allow for fluid-flow and non-flow, respectively. The valve stem (40) has a free end and an engagement end where the engagement end engages the valve sealing body so that rotation of the valve stem' operates the valve sealing body between the open and closed positions. A measurement passage (45) is defined through the valve stem from the free end to the engagement end. The measurement passage is in fluid communication with the fluid passage (15) when the valve sealing body is in the open position, and at least one sealing member (60, 64) is positioned within the measurement passage (45).
Abstract:
A valve includes a valve body with a hollow valve body interior and an opening-defining portion that defines an access opening. The opening-defining portion is arranged as a connection-facilitating structure for facilitating the fluid-tight connection of a separate isolation valve assembly to the opening-defining portion in a position over the access opening that enables removal and replacement of a valve-stopping mechanism from the valve through the isolation valve assembly. It may include a flange, exterior thread, one or more annular grooves or rings, and/or a segmented cam lock arrangement. The associated method includes (i) providing a valve-servicing assembly having an isolation valve assembly and an attached chamber-defining structure that defines a fluid-tight pressure chamber in which the valve-stopping mechanism fits, (ii) connecting the auxiliary valve assembly to the opening-defining portion of the valve body, and (iii) withdrawing the valve-stopping mechanism through the isolation valve assembly into the pressure chamber.
Abstract:
Disclosed is a slide valve (10) suitable for very high temperature service, having a liner of refractory material and a wedging system with wedges (22) wedging a disc (18) against an orifice plate (16). The slide valve (10) is also desirable for use under lower temperatures as the wedge system firmly wedges the disc (18) into stable sealing engagement with the orifice plate (16), closing the orifice (16) under flow conditions.