| 摘要 |
PURPOSE: A non-return valve is provided to easily realize the necessary high durability while satisfactorily maintaining the water tightness of connecting part between a valve sheet and a stopper. CONSTITUTION: The non-return valve(10) is composed of: a non-return valve(10); a valve sheet(11); a ball(12) for opening and closing the relevant valve sheet(11) by the back pressure of the fluid; a stopper(13) for restricting the moving amount of the ball(12); and a connecting member(14) for integrally combining the valve sheet(11) and the stopper(13) and having an inclination lower than one of the valve sheet(11), the ball(12) and the stopper(13).
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