Composition Casing: aluminium, cast iron Diaphragm: Santrophene, Hytrel, Teflon, Viton, EPDM, Buna-N Ball: Santoprene, Hytrel,Teflon, Viton, Stainless steel, Ceramic Ball seat; Santoprene, Hytrel,Teflon, Viton, Stainless steel Center Block: PP, Aluminium, Stainlees steel Weight Aluminium pump: 11kg Cast iron pump: 25kg Technical Parameters Suction lift (mwc): Dry: 4 / Wet: 8 Max particle diameter (mm): 4 Suction and discharge size (in): 1 Air inlet (in): 1/2 Max flow (l/min): 157 Max head (m): 84 Max air inlet pressure (bar): 8.4