| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball check valve for preventing the vibration of a ball during the flow of fluid and suppressing the occurrence of noises without reducing a flow amount. SOLUTION: The ball check valve comprises a cylindrical valve body 1 having at least two opening portions 8, 9 in which protruded portions 7 are provided in the inner-face axial direction, the ball 2 held in a valve body 1 movably forward and backward in the axial direction by the protruded portions 7, a seat ring 4 held in one opening portion 8 of the valve body 1 via the protruded portion 7 and a stopper ring 3, a collared short pipe 5 held via the seat ring 4 in the state of being sealed to the valve body 1, and a cap nut 6 threaded to the valve body 1 to fix the collared short pipe 5 to the valve body 1. During opening the valve, the ball 2 is held by the protruded portions 7 so that its center is shifted from the axis of the valve body 1. COPYRIGHT: (C)2009,JPO&INPIT
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