Quincy QGSV Variable Speed Rotary Screw Air Compressor

The Quincy QGSV is a variable speed rotary screw air compressor built for plants that spend most of the day at part load. A dedicated drive continuously matches motor speed to actual air demand, so the compressor produces what the system needs instead of loading and unloading against a fixed setpoint.

Why Variable Speed

Fixed speed compressors run flat out and then blow off or idle when demand drops, and that unloaded time is wasted energy. The QGSV turns down to 20% of capacity and holds discharge pressure in a much tighter band, which cuts energy consumption, softens the inrush current that hammers your electrical service on every start, and reduces pressure swings that show up as quality problems in sensitive processes.

Where It Makes Sense

• Plants whose air demand rises and falls through the shift rather than sitting flat
• Facilities chasing lower kWh per 100 CFM
• Processes that need stable, repeatable line pressure
• Sites with electrical service that can't absorb repeated across-the-line starts

Standard Features

• 20–100% turndown capacity
• Infologic2 Connect controller on 10 through 20S; Q-Control touchscreen on 20 through 60
• Direct drive transmission for lower transmission loss and reduced maintenance
• TEFC drive motor
• 8,000 hour synthetic fluid
• Low sound enclosure — 64 to 74 dB(A) depending on model
• Tropical thermostat and oil heater

Configurations

120 Gallon Tank — the compressor mounted on a horizontal 120 gallon ASME receiver. One footprint, one set of connections, no separate tank to pipe.

120 Gallon Tank w/ Dryer — the same package with a 39°F dewpoint refrigerated dryer integrated. Note the dryer needs its own 115/1/60 electrical connection.

Base Mounted — compressor only, for systems that already have receiver capacity or need the tank sized separately.

Base Mounted w/ Dryer — compressor and mounted refrigerated dryer, no receiver.

Capacity and Pressure

Capacity figures shown in the model selector are Free Air Delivery at the pressure each unit ships configured for, tested per ISO 1217 Annex C. Because a variable speed machine trades flow for pressure, the same frame delivers noticeably more air at a lower setpoint — the QGSV-20, for example, moves 100.3 CFM at 100 PSI but 71.5 CFM at 175 PSI. If your system runs at a lower pressure than the configuration listed, talk to us before ordering and we will size it against your actual demand.

True Blue Warranty

Five years on the airend. Five years on the drive motor, heat exchanger and separator tank. Bumper-to-bumper coverage for 12 months from start-up or 18 months from factory shipment, whichever comes first. The extended coverage requires authorized start-up, genuine Quincy parts and fluids, and complete maintenance records.