Double Diaphragm Pump Pump Operation Type Air Operated Max Flow 53 gpm Max Temp - Pumps 180 Degrees F Housing Material - Pumps Polypropylene Inlet/Outlet Size 1 In. Connection Style NPT Air Inlet Size 1/2 in FNPT Diaphragm Material - Pumps PTFE - Santoprene(R) Backup Agency Compliance CE ATEX EAC Valve Type 15 ft. Max Flow GPM 53 Max Operating Pressure 100 psi Ball Material PTFE Check Seat Material Polypropylene Max Dia Solids 1/4 In. Manifold Connection Multiport