Air-Operated Double Diaphragm Pump Polypropylene Construction & PTFE Diaphragm & 2.5 GPM Flow Rate Our self-priming diaphragm pump features an all-bolted polypropylene body and double PTFE diaphragms, sturdy and corrosion-proof, without leakage. Sealed ball valves and non-stall operation provides outstanding performance. It is perfect for transferring viscous and flammable fluids. Our top of the line self-priming diaphragm pump will ensure your operations are flowing smoothly. Premium Double PTFE Diaphragms Excellent Air-operated Performance Unique & Professional Designs Key Features Premium Double PTFE Diaphragms: Our air-operated double diaphragm pump adopts PTFE diaphragms, durable, corrosion-proof, and long-lasting. Max. Temperature: 150 ℉/66 ℃; Max. Pressure: 80 psi; Max. Flow Rate：2.5 GPM; Max Head Lift：226.4 ft/69 m. Sturdy & Leak-proof Construction: The diaphragm pump housing is made of polypropylene material, bolted against leakage, sturdy, and corrosion-proof for long-time