1.green sand casting 2.Your specification and drawings are welcomed. 3 ... pump body and valve .aluminum casting part Casting: investment casting ,precision casting, lost wax casting ,soluble glass process complex shell process.Materials: stainless steel ,carbon ... ASTM, BS,JCSI.Piece numbers: small, medium and large series.Process: cast, machining, turning, milling, drilling, thread cutting.Surface ...