Munich / Dortmund. WILO SE (Dortmund) presents an extensive product range for water supply as well as sewage disposal and purification at the IFAT ENTSORGA 2010, the leading world-wide trade fair for water, sewage, waste and raw material industry in Munich. The company is one of the leading manufacturers of pumps and pump systems for heating, cooling and air-conditioning technology, for water supply and drainage and sewage. Wilo is represented by almost 70 subsidiaries all over the world and employs more than 6,000 people worldwide.

 

A sewage pump with new impeller shape is in the centre of attention of the trade fair presentation. The new development takes into account that the amount of solids in sewage and that the sewage becomes more and more aggressive at the same time. Therefore, the impeller is designed for utilisation in untreated sewage and combines insusceptibility against clogging - similar to vortex impellers - with a high efficiency which corresponds approximately to the one of single-channel impellers.

 

A significant characteristic of the special construction of the new impeller is the flow optimised design to prevent pointed geometries to which solids can stick or where they can settle. Moreover, flow grooves installed in the suction range provide slight turbulences, which counteract possible deposits. The new pump series is available with the nominal diameters DN100 to DN350. Volume flows of more than 600 l/s or delivery heads up to 60 m Hmax can be realised.

 

“The sewage pumps equipped with the new impeller which achieve a hydraulic efficiency of up to 81 % set a new standard for energy-efficient and efficient sewage disposal,” said the manufacturer before the trade fair. The symmetric construction and feed channels and flow grooves arranged in the suction opening prevent vibrations. This is a further advantage because weight and fluid flow are homogenously distributed and the fluid is led in the discharge channels. Moreover, the impeller is particularly vibration-free due to its symmetric and cylindrical construction.

 

WILO SE presents as further trade fair innovation slow running submersible mixers with particularly power saving asynchronous motors which comply with the new European energy efficiency class IE3 for not immersed asynchronous motors. The power consumption decreases in comparison to common machines to approx. 10%. Considering that submersible mixers with up to 24 hours daily operating time in wastewater treatment plants present one of the largest energy consumers, significant cost savings can be achieved. Wastewater treatment plant technology from Wilo is one of the most power saving and thus most efficient systems on the market due to a wing shape of the mixers and highly efficient planetary gear which is optimised to minimise the use of energy. It is also possible to retrofit existing mixers with IE3 motors.

 

Moreover, Wilo informed before the trade fair that the coating "Wilo-Ceram CT" which is also used for submersible-motor pumps for potable water abstraction is now KTW approved. Surfaces of pump and motor housings as well as impellers which are equipped with this highly effective two-component-coating have particularly longer service lifes. Additionally, the efficiency of the pumps can be increased by approx. 2% so that the entire life cycle costs can be reduced in particular.

 

Wilo at the IFAT ENTSORGA Munich: Hall A6, stand 337/434