The Series QBY pneumatic diaphragm pumps are operated with compressed air.Our diaphragm pumps work as well as those imported from Germany or USA, suitable for pumping fluids with particles and other various liquids which are highly viscous, volatile, corrosive or toxic, as well as colloids. The pump body is made of aluminum alloys, cast iron or stainless steel. The diaphragm is made of high quality rubber such as nitrile rubber, chloronorgutta rubber, fluoroine rubber. The diaphragm pumps are widely used in the petroleum industry, chemical industry, electronic industry, ceramic industry, food and textile industry.