... Open Plate TypeMaterial: Alloy Steel, Ductile Iron, Grey IronFinishing: EPD CoatingDeep Carburized Wear SurfaceHeavy-duty valve designNo weldingDimensions and tolerances per ANSI ... . We also make other parts for mud pumps like valve seat,piston,spring,pump plate,retainer etc.2 They are made ... plywood cases or steel crates as per customer's requirements.Standard: ASTM, BF,BS, JIS, UNI, ANSI, ISO etc.We ...