| 摘要 |
PURPOSE:To prevent frequent opening/closing of main valve due to slight droppage of water level, by interlocking the pilot valve for opening/closing the pilot valve hole of an automatic water supply valve with a float responsive to the variation of water level. CONSTITUTION:A pressure operating body 5 movable up and down through differential pressure functioning onto the upper and lower faces is provided in a water supply valve body 1, where a chamber 7 on the back of operating body 5 is communicated through a control hole of specific diameter to the interior of the body 1. While main valve 9 for opening/closing a delivery port 3 is provided on the lower face of said body 5 to penetrate a pilot valve hole 10 for communicating the back pressure chamber 7 through the delivery port 3 to the outside of said body 1. The diameter of pilot valve hole 10 is made larger than that of control hole 8 and the pilot valve 12 for opening/closing the pilot valve hole 10 is communicated to a float 14 responsive to the variation of water level. |
