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AssigneeFujikin Incorporated
InventorsShunji Obara, Keigo Kobayashi, Keisuke Ishibashi, Souta Hachiman, Yusei Horikawa, Taichi Kitano, Kazutaka Masuda
Estimating the term…
To provide a diaphragm and a diaphragm valve which solve a problem of deterioration of air-tightness due to insufficient tightening of a bolt and damage to the diaphragm due to over-tightening of the bolt, as well as reducing variations in performance such as durability of the diaphragm and simplifying tightening work. A diaphragm is provided with a through hole having a diameter larger than a diameter through which a bolt can be fitly inserted. A bolt insertion cylinder made of metal through which the bolt can be inserted is fitted in the through hole. A height of the bolt insertion cylinder is equal to or less than a height of the through hole.
A diaphragm for a diaphragm valve which is pinched between a body and a bonnet and fixed to the body and the bonnet with a bolt, wherein
A diaphragm valve which includes a body with a fluid passage, a diaphragm which opens or closes the fluid passage by coming into contact with or being separated from a valve seat formed in the fluid passage, a bonnet which holds a peripheral edge portion of the diaphragm between the body and the bonnet, a stem connected to the diaphragm via a hanging metal fitting, and an operation mechanism for raising or lowering the stem and where the diaphragm is fixed to the body and the bonnet with a bolt, wherein
Dependencies are inferred from the claim text.