| 摘要 |
PURPOSE: A gate valve is provided to prevent a gate from being scratched by expanding and contracting a bellows pipe, thereby preventing the leakage of fluid due to abrasion. CONSTITUTION: A gate valve comprises a bellows pipe(210). The bellows pipe is installed in a first passage(101) of a valve body(110) connected to an upstream pipe through which fluid is entered. The front end(214) of the bellows pipe is reached to one side of a gate(103). At least one support ring(220) is installed in the first passage to support the bellows pipe. |
