Kabushiki Kaisha Fujikin

Fujikin Inc.

Masahiko Sogao

Tomohiro Mouri

Masakazu Nagao

Kazuhiro Yoshikawa

Yukio Minami

Tetsuya Kojima

Mutsunori Koyomogi

Masahiko Nakazawa

Kunihiko Daido

Yoshinori Shimomura

Keigo Kobayashi

Shuhei Ogawa

Shunji Obara

A valve having a simple configuration that prevents the seat from being damaged by self-excited oscillation of the valve body and thus prevents seat leakage. The valve includes a valve casing having a fluid inlet, a fluid outlet, and a valve chamber; the valve chamber including a seat having a seat surface; a stem inserted into the valve casing so that the stem can be vertically movable; and a valve body arranged at a tip of the stem and capable of abutting on the seat surface of the seat due to the vertical movement of the stem such that a tip part of the valve body does not come into contact with the seat surface due to oscillation of the stem.

Valve device

Valve

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.

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

A control valve comprises a valve body having a fluid channel and a valve seat; a valve operating part; a valve stem supporting member having its upper end fixed to the valve operating part and its lower end fixed to the valve body; a valve stem penetrating the valve stem supporting member and having its upper end part connected to the valve operating part and its lower end part entering the valve body, the valve stem being movable upward or downward by the valve operating part; and a valve element attached to the lower end of the valve stem. The valve element is moved upward or downward by moving the valve stem upward or downward, the valve element being brought into contact with and seated in the valve seat to close a fluid channel as it is moved downward, the valve element being detached from the valve seat to open the fluid channel as it is moved upward. The valve stem supporting member has an upper tubular body and a lower tubular body, the upper tubular body having its upper end fixed to the valve operating part and its lower end detached from the valve body, the lower tubular body having its lower end fixed to the valve body and its upper end detached from the valve operating part, the two tubular bodies being spaced apart each other, the lower end part of the upper tubular body and the upper end part of the lower tubular body being connected by a connecting member.

Control valve

Growing community of inventors

Osaka, Japan

Masahiko Sogao