| 摘要 |
<p>PCT No. PCT/NO91/00021 Sec. 371 Date Dec. 16, 1991 Sec. 102(e) Date Dec. 16, 1991 PCT Filed Feb. 15, 1991 PCT Pub. No. WO91/12448 PCT Pub. Date Aug. 22, 1991.A valve device comprising a valve housing having inlet and outlet end pieces for mounting of the valve in a pipeline, and a valve member being moveable for opening and closing of the valve. The valve member is mounted in a unit which can be removed from the valve housing and which consists of a cover that can be sealingly fastened to the valve housing in which cover is mounted a rod or spindle for movement of the valve member, a retainer in which the valve member is moveable and which carries gaskets for sealing against seats in the valve housing, respectively, and the valve housing has a transverse opening and is equipped with an arrangement for locking the cover in its mounted position, in order to permit rectilinear movement of the unit into and out of the transverse opening. The gaskets can be mutually shifted axially in the retainer whereby springs are provided for urging the gaskets axially towards the seats in order to cause sealing in the assembled state, and the retainer comprises assemblies for locking the gaskets in an axially retracted position in the retainer.</p> |
