The All-Flo D-series air-operated diaphragm pumps represent a cost-effective alternative for plastic pumps for all types of media. The striking and proven design in solid construction provides the necessary mass for an oscillating pump. Since the connection nozzles are available as separate housing parts, two additional connection versions are available in addition to the standard connection for adaptation to existing installations. Other features include ring pressing of the tie rods, good suction capacity, dry-run safety and the absence of drives, rotating parts and shaft seals.