Pump housing, motor support and impeller – brass. Mechanical seal – graphite/ceramic. Motor shaft – stainless steel. The pumps are equipped with an air-cooled asynchronous electric motor. To ensure low noise levels and long service life, the rotor rotates on oversized bearings filled with grease for life. 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. The motor design complies with CEI 2-3 and CEI 61-69 (EN 60335-2-41) standards.