Woosung Valve C.,LTD. Is a front runner of all kinds of check valves. Since 1992 year, our company has been developing and producing all kinds of check valves specialized in dual plate check valve, non-slam nozzle check valve, tilting(swing) check valve, wafer check valve and etc. We have a flexible production system which is suitable and enable to produce the many kinds of but small quantity per order according to the requirements of customers. We have a strong power and experience and know-how of check valves in the field of industry of Oil & Gas, Desalination, Poer, Petro-Chemical, Water treatment and so on.