Qingdao Singho Industrial Company Ltd & Qingdao Singho Machinery Company Ltd were established in 1999 & 2007 respectively, both of which belong to the same legal person. They are recognized as a qualified and proven producer and supplier of castings and finished machined parts to a wide range of industries. Our main products include Drill Pipe Float Valves, Float Collar and Float Shoe, pump parts, valve parts, Oilfield wellhead equipment parts, as well as Investment casting parts ( including automotive Parts, Engineering Machinery Parts, Food Machinery Parts, construction engineering Parts, Pump & Valve Parts) etc. The product materials include gray iron, ductile iron, carbon steel, alloy steel, stainless steel, aluminum bronze, etc. We use sand casting process, investment casting process,...