| 摘要 |
<p>PURPOSE:To permit automatic gas vent without applying additional work onto a pump liquid contact part body by exchanging the joint on a pump discharge side and a gas vent valve adapter. CONSTITUTION:A gas vent valve adapter 2 having a two-stage discharge bell valve 22 is screwed at the outlet of a discharge passage 21 on a pump liquid contact part body 1. A discharge passage 27 on the downstream side is formed, branched at right angles from a vertical discharge passage 26 formed in the adapter 2. A gas vent passage 31 is formed vertically from the branch point. A gas vent valve plug 30 is installed at the top edge of the passage 31. A check valve is installed in two stages in the plug 30. In said check valve, a ball valve 32 which is lighter than the specific gravity of the treating liquid is arranged on the upstream side. A ball valve 34 which is heavier than the specific gravity of the treating liquid is arranged on the downstream side. A discharge port 28 is throttled for the improvement of gas vent.</p> |
