The over-current parts of the food-grade electric diaphragm pump are made of 304,316L material, meeting the requirements of food-grade, using precision casting, with smooth and clean surface and higher strength. The valve balls are further ground by special machine, high roundness, good sealing performance. Integrated design of the diaphragm shield, with excellent pressure resistance, high temperature resistance, widely used in food, wine, daily chemicals, beverages industry.