Abstract:
Ventil (1), insbesondere Vakuumventil, mit zumindest einem Ventilgehäuse (2) und zumindest einem Verschlussorgan (3) und zumindest einem Ventilsitz (4), wobei der Ventilsitz (4) zumindest eine Ventilöffnung (5) des Ventils (1) umgibt und das Verschlussorgan (3) von zumindest einem Verschlussorganantrieb (6, 7) zwischen zumindest einer Öffnungsstellung, in der das Verschlussorgan (3) die Ventilöffnung (5) zumindest teilweise freigibt, und einer Schließstellung, in der das Verschlussorgan (3) mit einer Dichtfläche (8) des Verschlussorgans (3) zum Verschließen der Ventilöffnung (5) an den Ventilsitz (4) angedrückt ist, hin und her bewegbar ist, wobei zumindest eine Oberfläche (9) des Ventils (1) eine gemittelte Rautiefe RZ kleiner oder gleich 0,4 um, vorzugsweise kleiner oder gleich 0,25 um, aufweist.
Abstract:
A valve with a packing assembly includes a valve body assembly (12) with a bore, a valve member (17) moveable between an open position and a closed position, and a valve stem (23) coupled to the valve member. A first stem packing (37) circumscribes a portion of the valve stem, and is located in an upper bore portion of the bore. A first packing retainer (41) has a collar that limits axial movement of the first stem packing, and also has a first retainer body defining an inner cavity. A second stem packing (57) circumscribes a portion of the valve stem and is located in the inner cavity of the first packing retainer. A second packing retainer (67) has a neck compressingly engaging the second stem packing, and a retainer shoulder that engages the first packing retainer. A retaining assembly (84) is coupled with the valve body assembly for applying axial force to the second packing retainer.
Abstract:
A valve seat (10) for use in a valve incorporating a valve gate is disclosed, the valve seat comprising a valve seat body (12) and a biasing device (14) such as a spring (14), the biasing device being integral with the valve seat body. The biasing device and valve seat body may be welded together or may be formed in a single metal workpiece by a machining, casting or forging process. The valve gate and valve seat cooperate to form a metal -to- metal seal within the valve. At least a portion (15) of the valve seat is typically welded to at least a portion of the valve. A pipeline including at least one valve is also disclosed, as is a method of fitting a valve seat to a valve.
Abstract:
A gate valve seat for a gate valve includes a seat (101) having a stepped outer wall surface, with a spring (102), spacer ring (103), front facing lip seal (104), and a rear facing lip seal (105) disposed about the stepped outer surface of the seat. The spring (102) may be releasably locked into a compressed configuration for installation of the gate of the gate valve.
Abstract:
The present invention provides more efficient, cost effective coke drum valve devices and system as well as more efficient, cost effective methods for isolating the flow of matter in a delayed coker unit operation. Specifically, embodiments of the invention relate to various seat systems used in valves for delayed coking operations.
Abstract:
A machine arrangement that operates on a plurality of articles includes a plurality of machines arranged to cooperate with each other in a manner to form a machine arrangement. Each machine includes a modular base, a transfer star wheel, and a turret mechanism configured to perform a working operation on an article. The turret mechanism includes a turret star wheel. A central axis of the transfer star wheel is approximately 45 degrees below horizontal relative to a central axis of the turret star wheel. The turret mechanism includes a cantilevered portion overhanging a portion of the base.
Abstract:
A sliding component, particularly a disk valve plate. The sliding component includes a multi-layer surface structure comprising a strengthening layer harder than the substrate material, and an amorphous diamond top layer.
Abstract:
A stem-operated fire-resistant gate valve including an improved metal-to-metal stem backseat fusible ring (52) assemblies for facilitating automatic stem backseating at pre-selected temperatures, spring enhancement of the backseating procedure, and an improved metal-to-metal gate seat (70).
Abstract:
A valve stem packing assembly (33) can seal a valve stem (29) to a valve body (13) having a body cavity (21). The packing assembly includes a packing ring (71) circumscribing the valve stem within a stem opening extending axially through the valve body. A primary dynamic seal (34A) is positioned to seal a dynamic leak path between the packing ring and the valve stem. A secondary dynamic seal (34C) is spaced axially apart and functionally independent from the primary dynamic seal and positioned to redundantly seal the dynamic leak path. A primary static seal (34B) is positioned to seal a static leak path between the packing ring and the valve body. A secondary static seal (34D) is spaced axially apart and functionally independent from the primary static seal and positioned to redundantly seal the static leak path.
Abstract:
A gate valve (10) for use in oil field applications having a seal assembly (78) made up of an elastomeric case (80) and a spring (88) in the case having a V-shaped cross section. The spring has legs (90) that depend from one another, and free ends (94) of the legs that are contoured towards one another to define a rounded surface (96) on outer surfaces of the legs. The rounded surface reduces stress contact between the spring and the case, thereby prolonging seal assembly life. The seal assembly can be placed between a stem (20) in the valve and a gland packing (12). Other seal assembly locations include between a seat ring (32) and counterbore (34) in the valve body.