Rotary Screw Air Compressors

Lubricated Rotary Screw Air Compressors

A rotary screw air compressor is a positive displacement compression system that includes a pair of matching helical screws. An oil-flooded rotary screw compressor includes a lubricant that fills the gap between the rotors, which creates an air-tight hydraulic seal and transfers mechanical energy between the two rotors. The air moves through the threads as the screws rotate, and the meshing screws force the air through the compressor.



The QGS product line includes 5-30 hp belt screw air compressor models that include a long-life V-belt drive, high efficiency intake filter and a robust TEFC motor. The standard quiet enclosure is designed to reduce vibration and noise levels. The eight-thousand-hour premium synthetic fuel features a low oil carryover. An integrated dryer and tank mount option is also available.


  • 5-30 hp, Belt Drive                         
  • 40-100 hp, Gear Drive
  • 16-460 acfm, 125-150 psig
  • 62-69 dBA
  • Integrated dryer option
  • True Blue 5-Year Warranty


The QGD rotary air compressor line is specifically designed to provide reliable compression in the most challenging applications. The Airlogic 2 advanced control enables the compressor to operate with maximum efficiency. With a sound level as low as 66 dBA, you’re assured of quiet operation. The QGD is also designed for easy serviceability.


  • 15-60 hp, Gear Drive
  • 70-281 acfm @ 125 psig
  • Airlogic2 advanced control
  • Ease-of-maintenance design
  • Industrial-grade enclosure
  • 5-Year True Blue Warranty


Quincy’s premium QSI product line includes 20-350 hp premium industrial screw compressors regarded as among the most reliable direct drive models you’ll find anywhere. The QSI is available with Power$ync, a revolutionary variable capacity control system that enables the compressor to function as a base-load machine as well as a part-load machine. The 130-thousand-hour design ensures efficient, long-lasting performance.


  • 20-50 hp, Direct Drive
  • 90-226 acfm, 100-150 psig
  • Expandable PLC Control
  • Ease-of-maintenance design
  • Industrial-grade enclosure
  • 10-Year Royal Blue Warranty


The QGV is a 20-200 hp variable speed compressor featuring a 100-thousand-hour direct-drive air-end for reliable, long-lasting performance. The QGV is also designed and built for reduced power consumption, making it extremely energy-efficient. What’s more, the QGV industrial screw compressor includes a standard low-sound enclosure that provides sound levels as low as 68 dBA. You’ll also appreciate the QGV’s easy serviceability.


  • 20-200 hp, Direct Drive
  • 14.3-998 acfm, 75-150 psig
  • Variable speed-85% turndown
  • Very low power consumption
  • 10-Year Royal Blue Warranty


The QSLP is a low pressure direct-drive rotary screw compressor engineered to deliver 25-50 PSIG at peak efficiency — it can reduce energy consumption by as much as 25 percent. Key features include standard heavy-duty inlet filters, a high-efficiency positive displacement pump and a full instrumentation panel.


  • 100-200hp, Direct Drive
  • 88-1521 acfm, 30-40 psig
  • Low pressure applications
  • Most efficient at 7 cfm/hp
  • Clean – only 2-3pm carryover
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