Prominent-The pneumatic diaphragm metering pump is used wherever there is no available electrical power. The compression stroke is provided by compressed air applied to a diaphragm, which drives the PTFE-coated metering diaphragm. The suction stroke is provided by a spring-loaded force. The pump capacity is determined by the stroke length and stroke rate. Typical applications include animal feed treatment, paint spraying and car wash systems and fertiliser metering in horticulture.