Sturdy Stainless Steel Body:The shell of the airoperated diaphragm pump adopts stainless steel construction, all bolted, solid, and corrosion-proof. Max. Temperature: 150 /66 ; Max. Pressure: 90 psi. PTFE Double Diaphragm:The self-priming pump features double PTFE diaphragms, which have high resistance to corrosion and aging. Max. Flow Rate:3 GPM; Max Head Lift:196.85 ft/60 m±15%. Professional Air-Operated Designs:Our diaphragm pump is built to meet the international standard for reliable performance. Inlet/Outlet Port Size: 1/2 inch; Air Inlet Size: FNPT 1/4 inch. Sealed Ball Valve:It is easily accessible to ball checks and fluid caps for maintenance and repairs. In addition, the motor design delivers air efficiency. An "Unbalanced" air valve ensures no-stalling during operation. Handle Various Material:This air-operated diaphragm pump can transfer many viscous and flammable fluids, including waste oil, alcohol, hydraulic fluid, gasoline, , detergent, drinking water, and so on.