Single-stage centrifugal pumps with complete drainage device. Insulation capable of resisting over 3750V. Materials: Suction and discharge mountings and motor mountings in PPO Motor shaft in stainless steel AISI-420. Impeller in Noryl . Mechanical seal in graphite and alumina. Motor housing in aluminium L-2521. Windings impregnated with epoxy resin. Motor: Asynchronous, two poles. IP 55 protection. Class F insulation. Continuous operation.