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                    Double Discs Butterfly Type Buffering Non-return Valve(HX47)

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                    MATERIALS OF MAIN PARTS

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                    There are two discs, the small one is in the center of the large one. The large disc drops quickly when closing and it is controlled by the damper near the closing position and the small disc is controlled by another damper. Slow closing follows quick closing. This valve can prevent the pump turning back and super-high water hammer pressure.

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