Diaphragm Valve

摘要

A diaphragm valve includes a valve body, a diaphragm, a bonnet, an operation mechanism, and a fixing mechanism. The fixing mechanism includes a clamping member for integrally sandwiching and fixing, from both right and left sides, circumferential edges of both the bonnet and the valve body. A circular pressing member for pressing a circumferential edge of the diaphragm from above is interposed between the diaphragm and the bonnet and has convex portions and concave portions. The convex portions fit into notches provided at the circumferential edge of the diaphragm or the valve body, and the concave portions are fitted by protrusions provided at the circumferential edge of the diaphragm or the valve body.

主权项

1. A diaphragm valve comprising:
a valve body having a flow channel where fluid flows, a diaphragm which opens/closes said flow channel by abutting against and separating from said flow channel, a bonnet which sandwiches a circumferential edge of said diaphragm between said bonnet and said valve body, an operation mechanism attached to said bonnet for moving said diaphragm up and down, and a fixing mechanism for fixing said bonnet and said valve body, wherein said fixing mechanism comprises a clamping member for integrally sandwiching and fixing, from both right and left sides, circumferential edges of both said bonnet and said valve body, wherein a circular pressing member for pressing a circumferential edge of said diaphragm from above is interposed between said diaphragm and said bonnet, wherein the pressing member has convex portions and concave portions, wherein said convex portions fit into notches provided at said circumferential edge of said diaphragm or said valve body, and wherein said concave portions are fitted by protrusions provided at said circumferential edge of said diaphragm or said valve body.