1. Cast iron pump body can not only use stainless steel, but also high-strength materials such as cast steel and alloy steel. It is resistant to high temperature and corrosion and suitable for harsh industrial environments. 2. Cast iron pump body adopts shell casting, sand casting, investment casting and lost wax casting to make the surface smooth, without sand holes and pores. 3. Cast iron pump body has passed ISO9001:2008 and other international certifications.