Yamada® DP-15 Series Double Diaphragm Pumps 8 Gallons/ Minute ( DP-15) 1/ 2" NPT Fluid Port DP-15: Polypropylene: 1/ 2" Female NPT Groundable Acetal: 1/ 2" Female NPT Air Inlet 1/ 4" Female NPT ( includes ball valve) Air Exhaust 3/ 8" Female NPT ( includes silencer) Maximum Liquid Temperature1 Diaphragm Material / Temperature Neoprene: 180° F ( 82° C) Buna  N: 180° F ( 82° C) EPDM: 212° F ( 100° C) Hytrel® ( TPE) 248° F ( 120° C) Santoprene® ( TPO) 212° F ( 100° C) Viton® fluoroelastomer 248° F ( 120° C) Teflon® ( PTFE) 212° F ( 100° C) 1  Polypropylene and acetal pumps have a maximum liquid temperature of 180° F ( 82° C) regardless of diaphragm material. Air Supply Pressure ( All Models) 20 to 100 PSI ( 1.4 to 7 kgf/ cm² ) Discharge Volume Per Cycle DP-10:   0.020 gallons ( 74 cc) DP-15:   0.027 gallons ( 102 cc) Maximum Cycles Per Minute All diaphragms: 300 Maximum Size Solid 1/ 32" ( 1mm) Maximum Dry Suction Lift All diaphragms 10 feet Air Motor Standard: aluminum Order Informations : DP 15-FPS DP-15 pump F = Flat* ( Valve Type) P = Polypropylene ( Body Material) S = Santoprene® ( TPO) ( Diaphragm Material) Polypropylene Dimensions: 9.68" W× 11.69" H Net Wt.: 9 lbs. ( 4 kg) Shipping Wt.: 12 lbs