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Pump part: Pump body: stainless steel AISI 304; Discharge flange: brass; Pump shaft: stainless steel AISI 304; Shaft coupling: stainless steel AISI 304; Impeller: technopolymer; Shaped separating washer: technopolymer; Diffuser: technopolymer. Electric motor: Motor type: asynchronous, oil-filled, with built-in thermal protection in the winding; Stator winding: copper; Motor housing: stainless steel AISI 304; Motor shaft: stainless steel; Mechanical seal: ceramic/graphite; Bearing: rolling (C&U); Voltage: 230 V; Frequency: 50 Hz; Insulation class: F; Protection class: IP68; Operating conditions: Maximum temperature of pumped liquid: +35°C; Immersion depth below water level: up to 60 m; Content of abrasive impurities in suspension (sand, clay, lime, etc.): no more than 0.25%; Water pH: 6.5-8.5; Total water mineralization: no more than 1500 g/m3; Power: 4 kW; Borehole diameter: from 120 to 150 mm; Maximum head: 136 m; Maximum capacity: 240 L/min; Number of phases: three-phase; Rated current, I(A) Y8.0; Motor shaft: stainless steel; Impeller: technopolymer