Gardner Denver has released a new air-cooled version of its ground-breaking Ultima technology, the first air-cooled, oil-free compressor to offer heat recovery for process water.

By recovering up to 98 per cent of heat generated during compression, cost savings of approximately $130,000 are possible, compared with the nearest rival models. The patented closed package cooling system means the energy captured when during compression can be used to provide process water heating, delivering usable water temperatures up to 85°C.

The hybrid cooling capabilities offer users extra flexibility, allowing them to choose between air-cooling, water-cooling or both, depending on the most economical means of cooling at the time. For example, air-cooling might be more cost-effective during winter, when the heated cooling air can be re-purposed for space heating in a facility. On the other hand, during summer, when there is no demand for space heating, water-cooling might be more economical.

Delivering best-in-class performance, the air-cooled Ultima compressors offer cost savings of up to 13 per cent, compared with industry standards, even without the additional application of heat recovery. Because of their speed-regulated fans, the power consumption in standard conditions or at partial load is reduced even further. The technology is equipped with iConn, Gardner Denver’s digital analytics platform, helping operators to measure and optimise compressed air usage.

The compressors are available with a pressure range from 4 to 10 bar, volume flow from 6.7 to 23.9m3/min at 8 bar, and motor power from 75 to 160kW. If a site’s energy demands increase over time, each unit in the range is fully upgradeable to the required capacity, without needing to purchase a new unit and eliminating the associated downtime, delivery wait, installation costs and additional space requirements.

They are the quietest compressor in their class, with noise levels for the air-cooled model less than 70 dB(A). They also require up to 37 per cent less floor space than a conventional two-stage oil-free compressor, enabling easy installation in the smallest possible space. Their highly efficient internal cooling also means they can be placed close together, further optimising the available space.

Their design is truly innovative. Two highly efficient, permanent, variable-speed magnetic motors replace the traditional gearbox design and can achieve speeds of up to 22,000rpm and efficiencies greater than IE4.

Traditional gearboxes create friction, which results in efficiency losses and requires large amounts of oil to lubricate the gears. In contrast, Ultima’s motors directly drive the airends without the need for a gearbox, continuously monitoring and adjusting the speed of each airend, which ensures maximum efficiency and pressure ratios at all times.

Further, the highly engineered oil-free airends, designed and manufactured at Gardner Denver’s Centre of Excellence in Simmern, Germany, feature a special coating to protect the machinery and avoid performance degradation.

The Ultima compressors are completely oil- and silicone-free, and meet ISO 8573-1 Class Zero. The machine is also supported by Gardner Denver’s free six-year PureCare warranty, delivering users assured peace of mind.

Gardner Denver Industries
03 9212 5800


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