| 摘要 |
A watermeter equipped with a check valve for preventing back flow is provided to improve endurance and reduce manufacturing costs by insert-forming a check valve. A watermeter equipped with a check valve for preventing back flow includes an inlet pipe(11) and an outlet pipe(12) on both sides of a main body(10); a propeller rotated by stream of water inside a main body; and a check valve(20) movably shaft-jointed onto outside of a valve sheet(13) formed between the inlet pipe and the outlet pipe. The seat surface(14) is inclined toward the check valve and an O-ring(30) contacting with the inner surface of the check valve on the outer circumference. |
