| 摘要 |
<p>The disconnecting valve comprises a body (1) with a central bottom discharge orifice (1a) and two diametrically opposite ferrules (1b,1c) whose bores are threaded. The body is closed at the top by a cover (2) with a central bore (2a). A tube (3), fitted in one ferrule (1b), has a seat (3a) for an upstream valve (4) which is seated by a spring (5). The other ferrule (1c) has an outwards turned seat (1d) on which a downstream valve (7) is seated by a spring (8). The discharge valve (11) has an annular head (11a) and a tubular part (11b) which slides relative to the cover central bore. A membrane (13) clamped between the cover and the body has its centre fixed to the discharge valve by a washer (14) supported against a valve flange (11c). Liquid can escape through this central bore during opening of the valve (11) as well as through the central orifice (1a) of the body (2).</p> |
