| 摘要 |
PURPOSE:To make the damage of a valve case due to impact hard to occur by separating the valve case, in which a float mechanism is arranged, to an inner and outer cases and by arranging them in an ascending pipe of a water main. CONSTITUTION:An inner case 2 is a vessel body having such a configuration as to be closely fitted in to an outer case 1 and is provided with a through hole 6 at a position corresponded to a through hole 4 in the outer case 1. The valve cases are arranged in an ascending pipe B branched from a water main A. The air flowing in the water main A pushes down a float body 11 and escapes to the atmosphere through a junction passage 12 in a valve port body 13. The inside of the case 2 can be cleaned by shifting the case 2 to a position where the outer through hole 4 and the inner through hole 6 have no connection each other and by screwing out the valve port body 13. |
