We, Puyangshuangfa Industry Co., Ltd., established in January, 1996 and are a member of the Zhongyuan Oilfield Industry Company. Puyang City Shuangfa Industry Co.,ltd is a one designated manufacturer of network of Cina petroleum and Chemical Stock Company Material and Equipment Department and SINOPEC Material and Equipment Department, Many years, we apply ourselves to research and develop petroleum extraction machinery products all long. We have set up a series of self-contained systems ranging from product chain, sell network and service network. We specializes in the manufacturing and machining of Wellhead Device, Pumping Units, Subsurface Sucker Rod Pump, Tubing, Casing, Sucker Rod, Valves, Choke-line&Kill-line Manifold, Mud Manifold. The products have all been authorized to use the API monograms.