| 摘要 |
<p>PURPOSE:To make it possible to release residual gas only by replacing couplings, by disposing, in a passage connected with a purge line, an additional coupling adapted to be coupled with a coupling attached to the front end of an LP gas supply hose. CONSTITUTION:An additional coupling 15 is disposed in a passage connected with a purge line or a gas-liquid separator 9. Normally, a valve V4 in a purge line 8 and a valve V5 in a line 14 are closed while a valve V1 in a liquid feed line 6 and valves V2, V3 in a vapor line 7 are opened. Upon periodical inspection, etc. the valve V1 in the liquid feed line 6 and the downstream side valve V3 in the vapor line 7 are closd, and then a coupling 5 for the pipe feed line 6 is coupled to the additional coupling 15 for the line 14 and a manually operated valve 16 is opened. Accordingly, the passage between a hose 3 and the line 14 is established, and then the valve V5 in the line 14 and the valve 4 in the vapor line 8 are opend.</p> |
