... .Finishing: EPD Coating 4.Deep Carburized Wear Surface Name: Mud Pump Valve BodyFull Open Plate TypeMaterial: Alloy Steel, Ductile Iron, Grey ... are used for mud pumps. We also make other parts for mud pumps like valve seat,piston,spring,pump plate,retainer etc ... Centrifugal Casting etc.3) Machining Types: Machined by Round Bar, Drilling, Milling, Turning, Boring, Slating, Grinding,, NC/CNC Machining etc ...