Direct driven rotary screw compressors
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Direct driven rotary screw compressors

Main features Compact and efficient POLAR compressor, single stage lubrified, ranging from 75 to 250 kW, is the optimal response to the modern industry compressed air demands. Compact, with direct drive and operational pressures 7.5, 10 and 13 bar. The complete POLAR range is available with continuous flow control by means of an inverter drive (VS version). The machine is fitted with electronic controller, aftercooler, condensate separator (external for models 280 and 340) with time based drain. POLAR in the standard configuration, is air cooled and it is designed for continuous operation...

RotEnergyPlus As well as all NU AIR rotary screw compressors, also POLAR are ready to use and equipped with RotEnergyPlus cooling lubricant to synthetic base. RotEnergyPlus separates quickly from water, reduces friction and energy consumption, extends maintenance intervals and guarantees excellent bearing lubrication, providing great protection against rust and corrosion.

Main components Cooling fans Fan cooling system with thermostatic control by the electronic controller. Four fans in models POLAR 280 and 340; two fans in models 150, 180 and 220. Single fan in models 100 and 125. Tank and oil-separator filter Steel CE separator tank with internal separator cartridge granting optimal filtering degree and long service intervals. Minimum pressure and non return valve easily accessibile for easy maintenance and check. ASME, “U” Stamp, Nema or SQL tanks available on request. Oil filter and temperature control Double oil filter to grant total operational safety....

Microprocessor based electronic controller Countinuous monitoring of the operational parameters is performed by a microprocessor based electronic controller, programmable with different languages. The display indicates working pressure, internal pressure, warning for separator high delta P, overpressure, motor overload, airend discharge temperature, motor rotation check, service hours countdown (oil, oil filter, separator and air filter), load and total running hours. The controller includes a timer suitable for calendar based start and stop of the compressor.

Version with inverter drive (VS) Management costs Energy saving Energy Service Investment Energy SAVING The whole POLAR range is available with inverter drive (VS = Variable Speed). The application of inverter technology to screw compressors in the POLAR range allows best performance stabilizing the working pressure of the machine by regulation of the motor speed and of the air-end. Depending on the real compressed air demand of the network, the electronic controller regulates the frequency drive adapting the motor speed. A decrease of the network pressure corresponds to a higher air...

Technical data STANDARD Motor power Model Aria delivered Sound Connection level VARIABLE SPEED Model Aria delivered max. / min. l/min. Sound Connection level dB(A) ALL POLAR VS MODELS ARE ALSO AVAILABLE ON REQUEST WITH A WORKING PRESSURE OF 13 BAR.

Via Einaudi, 6 - 10070 Robassomero (TO) - Italy Tel. +39 011 9233000 - Fax +39 011 9241138 www.nuair.it - info@nuair.it In the tables, free air delivery as per ISO 1217 Annex C, at 0.5 bar less than maximum working pressure at the compressor outlet. Noise level: ± 3 dB (A) as per standards PNEUROP/CAGI PN-NTC 2.3. MODELS WITH DIFFERENT FREQUENCIES AND VOLTAGES AVAILABLE ON DEMAND. The models and specifications reported in this catalogue are subject to change without fore-notice