Blowers to provide oil-free, low-pressure air

For energy-efficient supply of oil-free, low pressure air for a broad spectrum of critical process operations, look no further than the latest Atlas Copco ZB range of centrifugal blowers

When it comes to the energy-efficient supply of oil-free, low pressure air for a broad spectrum of critical process operations, industry needs look no further than the latest Atlas Copco Z range of positive displacement blower units and centrifugal blowers.

The ZB series - high efficiency, low maintenance and environmentally friendly, oil-free centrifugal blowers are available in two versions, both guaranteed to offer a combination of high efficiency and extremely low life-cycle cost: the ZB 80 with a rated input power of 95kW producing 3600 m3/h at 1.1 bar(e) and the 190 kW ZB160 machine delivering 3800 m3/h at 1.7 bar(e).

The principal features of these blowers are the total absence of oil in the machine, a high-speed compact motor unit, frictionless, vibration-free drive and extremely low noise levels down to 67dB(A).

The heart of these units is the unique Atlas Copco-designed stainless steel, backward lean impeller with labyrinth seals for highest efficiency and minimal air leakage.

The impeller is directly mounted onto the motor shaft.

Because of the absence of a gearbox, the single stage blower is totally oil free.

The blower has a permanent magnet motor that reduces energy losses and cooling requirements, while offering a higher speed in a more compact design.

Similarly, the magnetic bearings are both trouble and maintenance free because their contactless operation means no friction, no wear and no vibrations.

The extremely low noise characteristic of the ZB blowers is the result of a standard baffled sound enclosure combined with vibration-free operation.

ZB blowers come as a complete package, the standard version featuring an air inlet system, including filters, sound enclosure, outlet check valve, blow-off valve with silencer, electronic controller, and ready-to-start electric equipment.

Options include LAN or Internet control/monitoring, an air-cooled version of the ZB 80 and a water-cooled aftercooler.

Typical applications for the ZB blowers include water treatment and aeration, fermentation processes, flue gas desulphurisation, air cleaning and drying.

ZL series units provide round the clock, pulsation-free, oil-free air.

The latest Atlas Copco ZL low noise, low vibration, low pulsation positive displacement rotary blowers are designed with trusted technology to deliver reliable quality air 24 hours a day.

The tri-lobe blower element concept, whereby two precisely balanced tri-lobe rotors turn inside an oval casing featuring milled pre-filling channels, offers superior energy efficiency and a significantly smoother, pulsation-free flow than traditional two-lobe rotor elements.

What's more, the separation of the element and the oil system, via labyrinth seals, guarantees 100% oil-free air delivery.

An additional advantage of this low maintenance design is that the sound waves produced by the pre-filling channels cancel out most of the blower noise - resulting in an overall reduction in noise level.

The ZL series delivers an almost constant flow rate, proportional to the operating speed, independent of the discharge pressure conditions.

The range consists of 17 sizes for intake volumes of 25 up to almost 8300m3/h, at overpressures of up to 1000 mbar, depending on the blower size.

Atlas Copco ZL blowers are eminently suited for round the clock process industry operations such as powder and granulates pneumatic conveying, liquid homogenising, water treatment aeration and filter flushing, furnace air supply, yarn drying and process air for chemical plants.

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