... & resin sand technology. Features to grey iron casting (pump body): 1.Material :GG20,GG25 or GG30.2.Moulding ... Inspection:direct-reading spectrum instrument,metallographic analysis,ultrasonic inspection,magnetic particle inspection or mechanical properties inspection.5.Surface treatment ... up to 800kgs.10.Representative product:housing,casing,pump body,valve body,cover,bearing stand,bolster,frame.