check valve is also called the reflux valve, reversing valve, back pressure valve, check valve. The valve is produced by the flow of the medium itself in pipeline automatic opening and closing of the force, belong to automatic valve. Check valve used for pipeline system, its main function is to prevent the reverse flow of medium, to prevent the pump and drive motor reversal, and emissions of containers within the medium. Check valve can also be used to supply, including pressure may rise to a secondary system, more than the pressure of the primary system. Performance range nominal path 15 pressure range 1-2000 mm. 0 ~ 16. 0 mpa Yu Zhongshui, steam, oil, etc. GB standard JB ANSI JIS manufacturing non-standard custom customizable

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