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US 2016/0123497 A1Published application
Diaphragm valve
AssigneeFujikin Incorporated
InventorsTsutomu Shinohara, Michio Yamaji, Kouji Nishino, Ryousuke Dohi, Nobukazu Ikeda, Toshio Doh
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Abstract
There is provided a diaphragm valve capable of reliably detecting damage to a diaphragm before breakage of the diaphragm in spite of the simple structure. A diaphragm includes a plurality of diaphragm layers. The uppermost diaphragm layer is provided with wiring. An abnormality of the diaphragm is detected by detecting breakage of the wiring.
Claims6
A diaphragm valve comprising:
- a body provided with a fluid inflow passage, a fluid outflow passage, and a concave portion opened upward;
- an annular seat disposed on a bottom of the concave portion of the body;
- and
- a diaphragm which opens and closes a fluid passage by being pressed against or separated from the seat, the diaphragm being elastically deformable,
- wherein the diaphragm includes a plurality of diaphragm layers, wiring is provided on at least one of the plurality of diaphragm layers, and an abnormality of the diaphragm is detected by detecting breakage of the wiring.
2 more elements
Dependencies are inferred from the claim text.