Atlas Copco Compressors has expanded its range of GA oil-injected rotary screw compressors with variable speed drive technology.
The company initially introduced its variable speed drive technology – VSD+, in 2013, a technology which allows energy savings of on average of approximately 50 per cent compared to conventional compression technology, while at the same time providing users a smaller operating footprint.
Atlas Copco has been phasing in this new technology sequentially, and until now, only GA 7-37 compressors came with VSD+.
However now all pack and full feature versions of the GA 37, GA 45, GA 55 and GA 75 kW compressors will be available with VSD+ technology.
Unlike other compressors, a VSD compressor automatically adjusts its motor and element speed to the air demand; whereas most fixed speed compressors simply operate in either an on or off setting, VSD systems only run at speeds required, cutting energy use and, importantly, costs.
According to Atlas Copco Compressors, its GA VSD+ compressors feature an iPM (Permanent Magnet) motor, a new compression element, and a sentinel valve.
“These new technologies allow it to deliver even more energy savings than the first generation of VSD compressors,” the company said.
“Free Air Delivery (FAD) and Specific Energy Requirement (SER) both improved by up to nine per cent, this means customers get up to nine per cent more air while using up to nine per cent less energy with the GA VSD+ compared to the GA VSD.”
The smaller operating footprint means the compressors are more efficient, and designed for compact working areas.
“The GA 7-75 VSD+ models are smaller and taller than the traditional GA (VSD) range, offering a smaller footprint,” Atlas Copco said.
Operator safety has also been a focus, with operational noise a consideration in their design.
Atlas Copco stated that the GA VSD+ compressors produce only 67dB, which it believes is one of the lowest noise levels in the industry.
“This means they can be installed on the work floor instead of in a separate space.”