Pump housing and motor support – cast iron. Impeller and diffusers – technopolymer. Mechanical seal flange – stainless steel. Mechanical seal – graphite/ceramic. Ejector housing – cast iron, Venturi tube – technopolymer and nozzle – brass. The pumps are equipped with an air-cooled asynchronous electric motor. The version with a single-phase electric motor has built-in overload protection. To protect the three-phase motor, overload protection must be provided in accordance with current regulations.