Kabushiki Kaisha Motoyamaseisakusho

Jun Yamashima

Osamu Uchisawa

Yohichi Kanno

Shigekazu Yamazaki

A diaphragm valve comprises a body with an inflow passage and an outflow passage for fluid, a valve seat disposed around said inflow passage, and a diaphragm which are disposed on said valve seat and opens and closes between said inflow passage and said outflow passage, and a gas flow hole which connects said inflow passage to said outflow passage is disposed in said valve seat.

Diaphragm valve structure

Diaphragm type high pressure shut-off valve

A diaphragm valve structure which is durable and has high reliability is obtained. In the diaphragm valve structure, a body 11, a valve seat 12, a seat holder 13, and a diaphragm 14, are provided; an inflow passage and an outflow passage for fluids and openings thereof are formed in body 11, valve seat 12 is disposed around the periphery of the opening of the inflow passage, the valve seat is pressed downward into body 11 by seat holder 13, diaphragm 14 comes into contact with valve seat 12 and places the opening in an airtight state, and thereby, movement of fluid between the inflow passage and the outflow passage is halted. At least two projecting parts are formed between the inflow passage and the outflow passage of this diaphragm valve structure; one of these two projecting parts is formed on valve seat 12, and the other projecting part is formed either on valve seat 12 or on seat holder 13. By means of this structure, it is possible to maintain contact between diaphragm 14 and at least one projecting part, and it is possible to increase the reliability of the airtight state.

Growing community of inventors

Miyagi-ken, Japan

Jun Yamashima