Diaphragm with flange and annular ridge and diaphragm valve using the same

摘要

A durable diaphragm valve has a single-layer structure consisting of rubber materials. The single-layer structure has a membrane part deforming and moving up and down with opening and closing of a flow channel and a flange part which is provided around said membrane part and sandwiched between a valve body and a bonnet. The flange part has an annular ridge consisting of an upper ridge protruding upward and a lower ridge protruding downward from a position corresponding to said upper ridge. The upper ridge has an inner upper ridge and an outer upper ridge with its protruding height being lower than the inner upper ridge, which are consecutively formed in a staircase pattern.

主权项

1. A diaphragm attached to a diaphragm valve,
having a single-layer structure comprising rubber materials, and comprising; a membrane part deforming and moving up and down with opening and closing of a flow channel and a flange part which is provided around said membrane part and sandwiched between a valve body and a bonnet, wherein said flange part has an annular ridge, wherein said annular ridge comprises an upper ridge protruding upward and a lower ridge protruding downward from a position corresponding to said upper ridge, wherein said upper ridge has an inner upper ridge and an outer upper ridge with a protruding height of said outer upper ridge being lower than a protruding height of the inner upper ridge, which are consecutively formed in a staircase pattern, and further wherein said lower ridge has an inner lower ridge and an outer lower ridge with a protruding height of the outer lower ridge being higher than a protruding height of the inner lower ridge, which are consecutively formed in a staircase pattern.