The leak-proof bolted design of Versamatic’s ½” (13mm) air-operated double-diaphragm pump (AODD) minimizes downtime and ensures continuous operation. It also provides a superior seal for the safe and reliable transfer of chemicals in OEM systems and applications. Featuring a patented air valve design that prevents stalling and requires no lubrication, this pump guarantees dependable performance for chemical transfer. Available in a variety of materials, the ½” bolted metal AODD pump, alongside the ½” bolted plastic pump, offers: - A maximum flow rate of 12 gpm (45 lpm), surpassing other models - A corrosion-resistant air section - Reliable on/off operation - Durable, long-lasting construction - Extended-life diaphragms - Easy, cost-effective maintenance