Pump housing and motor support – cast iron. Impeller – brass. Motor shaft and strainer – stainless steel. They are equipped with a two-pole asynchronous electric motor made of stainless steel, cooled by the pumped liquid. The rotor rotates on oversized bearings, ensuring low noise levels and long engine life. Mechanical seal: graphite/aluminum oxide. The single-phase motor version has built-in overload protection and the starting capacitor is housed in a robust, electrically insulated, high-density plastic housing. To protect the three-phase motor, overload protection must be provided in accordance with current regulations.