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309 double disc check valve products are offered for sale by suppliers on Alibaba.comAbout 69% % of these are check valves, 6%% are valves(old), and 2%% are butterfly valves. A wide variety of double disc check valve options are available to you, such as normal temperature, medium temperature and high temperature.You can also choose from stainless steel, carbon steel double disc check valve,as well as from white, silver, and red double disc check valve,

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