Patent ID: 7328854

Claim:
A fluid control valve for use with a fluid, comprising: a tank through which the fluid passes; an inlet port, through which the fluid flows into the tank; an outlet port, through which the fluid flows out of the tank; a valve plug that opens and closes both the inlet port and the outlet port; a coupler connecting part of the inlet port side, which is located in an inlet passage connected to the inlet port; a coupler connecting part of the outlet port side, which is located in an outlet passage connected to the outlet port; an inlet coupler and an outlet coupler; a pipe connected to the coupler connecting part of the inlet port side by using the inlet coupler; a pipe connected to the coupler connecting port of the outlet port side by using the outlet coupler; and an annular element offsetting a shoulder part caused by a difference in flow passage diameter existing between each of the coupler connecting parts of the inlet port side and the outlet port side, the corresponding inlet or outlet coupler being placed at each of the coupler connecting part of the inlet port side and the coupler connecting part of the outlet port side.