A pump is a machine that delivers fluid or pressurizes fluid. It transfers the mechanical energy of the prime mover or other external energy to the liquid to increase the liquid energy. The casting materials of pump casing are commonly cast iron, cast steel, bronze, etc. According to the strength, corrosion resistance, casting and machining performance, they are divided into cast iron gray cast iron HT200HT250GB9439-88 gray cast iron parts, old brand HT20-40HT25-47 copper molybdenum gray iron HT200CuMo Same as above low nickel cast iron STNi2CrQJ/S f2.34-1996 low nickel cast iron technical conditions wear-resistant cast iron casting stainless steel martensitic cast steel ZG1Cr13G2Cr13GB2100-80 stainless acid-resistant steel casting technical conditions ZG1Cr13NiQJ/S f2.01-199 carbon structural steel and Low alloy steel Q235-A.F16MnG. Mass casting production can be carried out according to drawings and samples.