Teningen, Germany - Polyurethane in place of aluminium has allowed two German companies to create a lighter and more cost-efficient wastewater lifting plant. Wastewater technology company Strate, based in Sarstedt, Germany, designed the solution in conjunction with PU parts maker Thieme who provided moulded parts for the machine.
Strate has been producing fully automated, aluminium Awalift sewage pumping plants for a number of years, according to a 5 July statement from Thieme. But this is the first time that a wastewater system was made using polyurethane, Thieme added. The objective was to cut weight in half and reduce production costs.
Polyurethane material Baydur GS from Bayer MaterialScience was used to make the container and some internal parts, and the 'lift core' of the system is made of low-density integral hard foam (Baydur 66 FR). The parts range in weight from 74g to 13.5kg, Thieme said. And the total weight, including pump motor, is about 42kg, considerably less than the aluminium construction (78kg).
"The clear weight reduction is not the only advantage of this PU construction," commented Jürgen Vogel, Thieme project manager. He added, "Another important sales feature for the manufacturer is its low noise emission at start-up and during operation of the lifting system due to the low noise emission of the PU parts."
The entire assembly is mounted in the Thieme plant in Teningen, Germany, before it is completed with the functional parts of the pump and control and tested by Strate.