Internal gear pump Model CD26ER-3U222 - P/N 3852 CD: Chemical Duty pump in stainless steel, complete with electric motor on a common baseplate through flexible coupling 26: Pump size DN 25 - 1 " E: Suction/Discharge connection in-line R: Safety valve, single acting for protection against excess pressure 3: Casing & cover: G-X 6 CrNiMo 18 10, Rotor/Idler: X 8 CrNiMo 27 5, Shaft: X 8 CrNiMo 27 5 U: Idler bearing and main bearing lubricated by pump medium 2: Idler bush: Bronze, idler pin: X 8 CrNiMo 27 5 2: Bearing bush: Bronze, Shaft: X 8 CrNiMo 27 5 2: Single mechanical seal