| 摘要 |
A diaphragm type control valve is provided to open and close a passage between pipes without using a spring by using a plurality of protrusions providing restoring force like the spring to a valve plate opening/closing the passage. A diaphragm type control valve includes a valve body(10) installed between pipes having a fluid passage. The valve body(10) is provided with a fluid passage passing through left and right end portions, and the pipes are connected to each other. A hole(13) is formed in the center portion of the fluid passage. A cover(20) is coupled to the body(10) and the cover(20) covers the hole(13). A plurality of protrusions is used to give restoring force to the a valve plate which opens and closed the fluid passage instead of a spring.
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