The Positive Displacement Blower Series Delta Blower Generation 5 by Aerzener Maschinenfabrik has been extended by integrated RPM-regulated systems especially for the use on variable requirements. They produce in a predifined range just the currently required quantity of conveying air (overpressure up to max. 1 bar, negative pressure up to max. 0,5 bar), fluctuating in the speed range between 25 and 100% and supplying now conveying air more economically. the series offer a fully automatic operation mode provided by modular structured and electronically operating AER-tronic-Control with TFT colour display and analogue touch panel. Its space-saving assembly allows for side-by-side without space between. The noise level is reduced by approx. 6 to 8 db(A) on average. the blowers are easy to operate and to maintain exclusively from the front; oil level control via sight glass visible from the outside. ATEX-design is optionally available. The all-in-one systems with integrated blowers, frequency converter and power section are ready to use after connection of power supply and conveying air line.