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Henan Kingwell Oil Equipment Co. , Ltd established in 2013, is a professional producer of series butterfly valves, DEMCO interchangeable butterfly valves, DM MUD gate valves, API6A gate valves, check valves, globe valves, air release valves, strainers, expansion joints and rigs, etc. KW brand valves are mainly used in oil & gas drilling and production, water, waste water, marine, chemical, power, mining industries. Kingwell passed ISO9001, ISO14001, API609 certification and adopts advanced CNC，s