Submersible sewage pump as floodable, single-stage block unit in stationary, vertical installation for pumping of untreated sewage, which attacks the pumps neither chemically nor mechanically. Pump with radially arranged discharge piece and axial pump intake. Service-friendly unit structure by separated motor and pump housing unit. The duty values must be guaranteed according to ISO 9906, class 2B.
Submersible motor in pressure-resistant design, with internal, hermetically-tight active cooling with highly efficient heat
exchanger, double mechanical shaft seal in EMU block design, as well as separate sealing chamber. The motor chamber and
the sealing chamber are filled with medical white oil. Motor sealing at the shaft by a double, wear-resistant mechanical shaft
seal independent of the direction of rotation entirely made of silicon-carbide as closed unit in EMU sealing cartridge of
stainless steel with intermediate separation chamber and additional shaft sealing ring.
Both seals are cooled and lubricated. The motor chamber is equipped with connecting terminals. Protection of the motor
winding by thermistors installed. Both closed ball bearings are maintenance-free and filled with high-quality grease. All
casing parts are of cast iron. Shaft and connecting elements are of stainless steel. The motor is suitable for continuous
operation (s1) under full load in immerged and completely emerged condition.
