New Sewage Lifting Unit to DIN 12050-1

Characterized by their steep pump curves, the units offer large safety margins to consultants and operators, who are faced with the imponderables inherent in the planning phase. For instance, the new unit automatically adapts to any changes in friction losses resulting from potential incrustation of the piping walls.

A level sensor detects even the slightest fluctuations in the water level and signals them to the control system's microprocessor. This processor is even capable of responding to the velocity of the inflowing sewage. This means the unit's start-up point is adjusted to surging sewage inflow, preventing the pump from taking in air and, ultimately, from running dry. At the same time, this system ensures the volume of the collecting tank is used to its optimum and lowers the switching frequency. The results are energy savings and reduced noise emissions. In addition, the control unit can identify vertical level fluctuations in the system and prevent the pumps from starting up unnecessarily.

Permanent self-diagnosis enables the control unit to monitor its connection with the level sensor and to check that the sensor is functioning properly. The customer can simply rely on the trouble-free operation of the lifting unit. Information about the operating status of the system is provided via a volt-free contact.

"mini-Compacta" units are delivered ready to be plugged in. On units with three-phase motors, the direction of rotation is checked automatically every time the pump is started up, so miswiring is detected immediately.

All unit sizes come with various connection options, which saves time and money during installation. The lifting units are either available for single-family houses or as duplex pump units including a stand-by pump where required by building regulations. Thanks to their compact dimensions they take up very little space. The gas and water tight plastic collecting tanks are fully floodable, with volumes ranging from 60 to 150 litres.

The pumps are equipped with free-flow impellers, which cope well with any stringy substances in the sewage. An additional version with cutter is available for handling heavily fibre-laden fluids. A novel, demand-driven torque adjustment feature makes this model considerably more energy efficient than conventional macerator systems. The motors are of particularly robust design, with greased for life deep-groove ball bearings.

An integrated check valve prevents the piping system from emptying and protects the mechanical seals against damage from reverse rotation. The unit is designed for waste water up to a maximum permissible continuous temperature of 40 °C. For short periods it can also cope with temperatures of up to 65 °C.

All lifting units have been awarded the LGA Quality Certificate issued by the German Landesgewerbeanstalt Bayern (LGA) in confirmation of their defined, consistently high quality level. This certificate confirms that a product is electrically safe, ecologically sound and fully functional. In other words, it stands for comprehensive quality. Annual inspections of the production cycle are performed to ensure the lifting units are of consistently high quality.