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Slow shut check valve,Website:http://www.fagong-valve.com, also known as check valve or check valve, its role is to prevent the backflow medium pipeline. Open-close part by medium flow and power to open or closed, to prevent the backflow medium valve check valve. Check valve belong to automatic valve class, mainly for the one-way flow of medium pipeline, only allowed to medium flows in one direction, in order to prevent accidents. This valve shall generally be installed in the pipeline. Slow close check valve is installed in the high-rise building water supply system and other water suppl