QBY series pneumatic diaphragm pump is one of the most innovative pump products at present, which combines the advantages of self-priming pump and slurry pump, including simple structure, strong medium adaptability, strong self-priming ability and spacious flow channel. It can be adopted to convey various corrosive liquids, high viscosity, volatile, flammable, explosive, toxic liquids and other media in inspection, petroleum, chemical, printing and dyeing, building materials, food, environmental protection and other industries. Moreover, the design of the diaphragm can avoid environmental pollution caused by leakage when transporting toxic and volatile media.