| 摘要 |
<p>PURPOSE:To perform both air and pressure bleeding operations automatically, by setting each step part of both large and medium diametral parts of a through hole down to a valve seat, and installing an exhaust port, to be interconnected to the outside from the large diametral part, in a side edge of this valve seat. CONSTITUTION:A valving element 15 consists of a body part 16 to be set up in a large diametral part 8 and a nozzle part 17 extending to the inside of a medium diametral part 9. A compression coil spring 19 is shrinkingly installed between both step parts 20 and 21, while an exhaust port 22 is formed in another step part 23 and leads to the outside. When a fluid passes through the inside of the valving element 15, this exhaust port 22 becomes closed, whereby it is fed to a pipe 6 with pressure, and when the flow dwindles away to nothing, the valving element 15 becomes opened and pressure bleeding take place. At the time of starting of a pump, the valving element 15 separates from the step part 23, and air bleeding takes place as well.</p> |
