| 摘要 |
<p>A double block and bleed valve system comprising a chamber (2) havng first and second fluid passage openings (6, 7) provided with first and second valve means (10, 11), respectively, is connectable, in use of the system, to respective pipe sections (26, 27) from which said chamber (2) is isolatable in use by closure of said first and second valve means (10, 11); and a drain opening (9) provided with a drain valve (15). …<??>A spray means having an inlet in communication with the exterior of the chamber for connection, in use, with a cleaning fluid supply (24), and having at least one spray head (21) is formed and disposed in said chamber (2) for spraying, in use, substantially all the interior surfaces of said chamber (2) with cleaning fluid supplied thereto.</p> |
