Submersible borehole SD pumps for 4” and 6” wells SD Materials Components External jacket : Cr-Ni steel AISI 304 Stage casing ( 4SDF) : Cr-Ni steel AISI 304 Stage casing : Polycarbonate Diffuser : Polycarbonate Impeller : GFN2V* ( NORYL® ) * for 4SDF Wear ring : Cr-Ni steel AISI 304 Shaft : Cr steel AISI 430 F Delivery casing : Bronze Suction lantern : G-Cu Sn 10 EN 1982 Bearing bush : Thermoplastic Strainer : Cr-Ni steel AISI 430 Screws : Cr-Ni steel AISI 304 Spesifications Model : 4SD5/ 10N Cap. : 40 l/ min Power : 1 HP Head : 51 M Model : 4SD75/ 9 Cap. : 50 l/ min Power : 1 HP Head : 57 M