... sand & resin sand technology. Features to grey iron casting (pump body): 1.Material :GG20,GG25 or GG30.2.Moulding processing ... 8.Industrial categories:water supplying industry,water treatment industry,electric power industry,general machine industry and others.9.Part Unit weight ... from 10kgs up to 800kgs.10.Representative product:housing,casing,pump body,valve body,cover,bearing stand,bolster,frame.