| 摘要 |
A flap valve for buffering shock in a water supply system is provided to prevent damage of the valve and a pipe and to lengthen the service life span by restricting a disk from slamming. A flap valve is installed in a discharge port(1) of a pump to shut off back flow in stopping the pump, and composed of a ring-shaped frame(10) installed in the discharge port and provided with a first annular projection(13) and a disk(20) opening and closing the frame and having a second annular projection(23) fitted to the first annular projection for buffering shock in closing the frame. A third annular projection(17) is protruded in the frame, and fitted to the outer periphery of the disk. A sealing member(51) is mounted in the first annular projection, contacted to the disk and combined with a fitting groove(19). |
