Atlas Copco Compressors will showcase its range of low pressure blowers for the wastewater industry at booth No. 7615 at WEFTEC. Products on display will include the ZB range of centrifugal air blowers, the ZM range of multistage centrifugal blowers and the ZS range of oil-free screw blowers. The efficiency of the ZS range is attributed to its use of screw technology versus conventional lobe technology. The screw compression element has a fixed, built-in pressure ratio and has no mechanical forces that cause unbalance, allowing high shaft speeds and large flow rates with small exterior dimensions. The internal air flow path is also optimized to reduce pressure drops and air turbulence and a direct drive integrated gearbox reduces transmission losses. The combination of these elements plus the integrated variable speed drive (VSD) results in a machine that uses 30% less energy than the previous lobe type blowers. In addition to wastewater treatment, other industries with blower applications that can benefit from the latest energy saving technologies include pneumatic conveying, power generation, food and beverage, pharmaceuticals, chemicals, pulp and paper, textiles, cement and general manufacturing.