Internal gear pump Model GP26E-1U22B GP: General Purpose, mono block pump in cast iron 26: Pump size DN 25-1" E: Suction/Discharge connection in-line R: Safety valve, single acting for protection against excess Pressure 1: Casing & cover: GG-25, Rotor/Idler: GG-25, Shaft: St.60.2 U: Idler bearing and main bearing lubricated by pump medium 2: Bearing: Idler bush: Bronze, idler pin: Hardened 16 MnCr5 2: Bearing bush: Bronze, Shaft: St.60.2 B:Teflon-impregnated, non asbestos packing