... 3.Finishing: EPD Coating 4.Deep Carburized Wear Surface Name: Mud Pump Valve BodyFull Open Plate TypeMaterial: Alloy Steel, Ductile Iron, Grey ... . We also make other parts for mud pumps like valve seat,piston,spring,pump plate,retainer etc.2 They are made ... Resin Sand Casting, Green Sand Casting), Permanent Casting, Die Casting, Centrifugal Casting etc.3) Machining Types: Machined by Round Bar, Drilling ...