| 摘要 |
<p>PCT No. PCT/NO90/00031 Sec. 371 Date Aug. 8, 1991 Sec. 102(e) Date Aug. 8, 1991 PCT Filed Feb. 7, 1990 PCT Pub. No. WO90/09538 PCT Pub. Date Aug. 23, 1990.A valve apparatus, in particular a rotatable valve comprising an upper part (10) and a lower part (6) which are demountably attached to each other. The valve's lower part (6) is mainly U-formed with sealing surfaces (17,18) arranged on the outwardly facing side faces, which sealing surfaces, in the case of closed valve bear against at least one valve seat on the valve housing's inlet and/or outlet end, and upper part's (10) external face is designed for totally or partly supporting bearing against lower part's (6) internal face and comprising a passage (34) designed to accommodate equipment, for example controlling or metering instruments in the upper part (10) can, in the case of closed valve, be lifted out of the valve housing (1) for maintenance.</p> |
