Double Diaphragm Pump Pump Operation Type Air Operated Max Flow 45 gpm Max Temp - Pumps 180 Degrees F Housing Material - Pumps Stainless Steel Inlet/Outlet Size 1 In. Connection Style NPT Air Inlet Size 1/2 in FNPT Diaphragm Material - Pumps Santoprene(R) Agency Compliance CE ATEX EAC Valve Type 26.5 ft. Max Flow GPM 45 Max Operating Pressure 125 psi Ball Material Santoprene(R) Check Seat Material UHMW Polyethylene Max Dia Solids 1/4 In. Manifold Connection Single