Acid-resistant pumps are chemical pumps used for handling corrosive fluids, for example end sution chemical pump. End suction chemical pump is a kind of chemical pump which is suitable for chemical plants, is used to transport corrosive liquids free of solid particles or liquids whose viscosity is similar to water. The medium temperature is generally minus 20 degrees centigrade ~ 105 degrees centigrade, the maximum working pressure is 1.6 Mpa, the inlet pressure should not be higher than 0.6Mpa.It is widely used at the industries to transport kinds of corrosive medium and the medium similar with water which must be immune to pollution such as petroleum, chemistry, metallurgy, synthetic, fiber, pharmacy, foodstuff, waste water treatment.