The vertical monoblock design permits excellent circulation performance with minimal space requirements. The maintenance-free bellow-type mechanical seal is cooled and lubricated by the pumping liquid. This results in long intervals between maintenance periods. An external circulation line/air bleed piping with a fitted air drain valve not only allows automatic but also manual air bleeding and results in the long life of the mechanical seal. The strainer tanks, sufficiently large as a design feature, are optimised from the point of flow engineering, therefore boosting the performance level to such a degree that the pumps work very efficiently. All the designs in this series also have an enamelled strainer housing.
Directly mounted, DIN-IEC three-phase, low-noise operation, surface-cooled, removable motor. In compliance with energy efficiency class IE2 up to 5.5 kW. IE3 from 7.5 kW, including the PTC resistor sensor.