Manufacturers Of Air Operated Double Diaphragm Pumps Available In Eight Port Sizes From 1/4" To 3" & Flows To 210 GPM. Housing Materials In Polypropylene, KynarŪ, PTFE, 316 Stainless Steel, Cast Iron & Aluminum & Seven Elastomer Options To Meet Most Demanding Fluid Transfer Needs. Operating Pressure To 105 PSI & Temperatures From Minus 40F To 250F. Pumps Are Marketed Worldwide Through Factory Authorized Distributors & Representatives