Qingdao HNA Oilfield Machinery Co., Ltd. Specializes in the development of mud pump fluid end expendables to customers all over the world . Our products are made as the good quality as OEM for full replacement and meet API specifications , with the streamlined and efficient manufacturing processes and competent staff. We also have built an ISO 9001 Qualified Quality Control System to ensure our products and services high quality. Our liners are designed to fit mud pumps of Emsco, Gardner-Denver , National , Oilwell , ldeco , Skytop/Brewster, as well as OPI, Wirth , Wilson and Gaso. Triplex and duplex are available with types of Hy-chrome iron liner, Chrome ?Cplated liner and Hardened steel liner . Our liner incorporates advanced technology, and is designed for the longest life to more than 1000 hours service, which earns reputation from worldwide customers. To meet our customers?? needs, we dedicate ourselves to research and develop products constantly as following: Hy-chrome Mud Pump Liner, Chrome-plated Liner, Hardened Steel Liner, Premium Cross Arms Valve and Seat, Fullopen Valve and Seat, Valve Spring , Long ?CLife Bonded Piston with Rubber and Fabric, Long-Life Bonded Piston with Urethane , Replacement Piston , Piston Hub , Piston Rod , Plate , Snap Ring , Crosshead , Upper and Lower Crosshead Guide , Extension Rod , Piston Rod Clamp , Threaded Ring , Liner End Cover , Valve Pot Cover , Valve Guide , Cylinder Head , Cylinder Head Plug, Cap , Liner Seal , Valve Cover Gasket , Cylinder Head Gasket etc.