| 摘要 |
PURPOSE:To let water out of a water pipe by providing a valve operated by stopping and supplying pressure water, which can freely open and close an air hole disposed on a main body of a water stop piece. CONSTITUTION:An air hole 9 connected to a discharge port 3' is disposed on a main body 8 of a stop piece 7. The lower end of the air hole is freely opened and closed by up-and-down motion of a ball valve 12 loosely disposed in a valve chest 11 at the central portion of a seal body 10. The valve chest 11 is connected to the water supply port 3'' side by a hole 13 on the water pipe 4 side. The ball valve 12 is moved up and down by supplying and stopping pressure water in a water supply port 3' to open and close the air hole 9. On stopping a water path on water supply side, the valve 12 is dropped by its dead load, so that the air hole 9 is opened to discharge water in the water pipe to the outside. |
