Quincy QGS Series Review: Quiet Rotary Screw Compressors

Q: Is the Quincy QGS Series suitable for 24/7 operation?

Yes, it’s built for 100% duty cycle and continuous use in industrial environments.

Q: How quiet is the QGS Series compared to piston compressors?

It operates significantly quieter—typically under 70 dBA—thanks to its enclosed cabinet and rotary screw design.

Q: What maintenance does the QGS Series require?

Oil changes every 8,000 hours, filter replacements, and periodic checks. Access is simplified via a single service panel.

Q: Can I install the QGS Series myself?

Installation should be done by an authorized technician to activate the 5-year warranty and ensure proper startup.

Q: Does the QGS Series come with a dryer?

Yes, select models include an integrated dryer. You can also choose base or tank-mounted versions without it.

Q: What voltage options are available?

Standard models support 230V and 460V configurations. Custom voltages may be available upon request.

Q: Is this compressor good for CNC machines?

Absolutely. Its consistent PSI and low oil carryover make it ideal for precision machining.

Q: How does the QGS Series compare to Quincy’s QT Series?

The QGS is quieter, more efficient, and better suited for continuous-duty applications. The QT is more affordable but louder and less efficient.

Q: What’s the warranty coverage?

Quincy offers a True Blue 5-Year Warranty, covering major components if installed and started by an authorized technician.

Q: Can I monitor the QGS remotely?

Not by default, but optional accessories allow for remote diagnostics and monitoring.

Introduction

The Quincy QGS Series is a belt-driven rotary screw compressor designed for continuous-duty operation in demanding industrial environments. Known for its quiet performance, long service intervals, and flexible configurations, the QGS Series is a go-to solution for manufacturers, automotive shops, and CNC facilities that require reliable compressed air without the noise or maintenance burden of older piston models.

Whether you’re upgrading from a reciprocating unit or scaling up your production floor, the QGS Series offers a compelling blend of durability, efficiency, and customization. In this review, we’ll break down its specs, compare it to alternatives, and help you decide if it’s the right fit for your workflow.

Key Features & Technical Specifications

Feature	Details
Horsepower Range	5 HP to 100 HP
Duty Cycle	100% continuous
Noise Level	Quiet enclosure with sound-dampening insulation
Lubrication	8,000-hour synthetic fluid included
Mounting Options	Base mount, tank mount, tank mount with integrated dryer
Motor Type	TEFC motor, IP55 rated
Startup Method	DOL (5–15 HP), Wye-Delta (15+ HP)
Filtration	High-efficiency intake filter, spin-on oil filter
Cooling	Air-cooled aftercooler
Warranty	True Blue 5-Year Warranty (with authorized startup)

The QGS Series is engineered for low vibration, simplified maintenance, and long-term reliability. Its modular design allows users to choose configurations that match their space and drying needs, while the TEFC motor ensures protection in dusty or washdown environments.

Pros & Cons

Pros	Cons
Quiet operation—ideal for indoor use	Higher upfront cost than piston models
Long service intervals (8,000 hours)	Requires authorized startup for full warranty
Flexible mounting and dryer options	May be oversized for light-duty shops
IP55 motor rating for harsh environments	No touchscreen interface on base models
Simplified maintenance access	Limited remote monitoring without add-ons

Comparisons to Alternatives

Model	Type	Noise Level	Maintenance	Ideal For
Quincy QGS Series	Rotary screw	Low	Minimal	Mid-to-heavy industrial use
Ingersoll Rand R-Series	Rotary screw	Low	Moderate	Large-scale manufacturing
Atlas Copco G-Series	Rotary screw	Very low	Advanced diagnostics	High-end facilities
Quincy QT Series	Reciprocating	High	Frequent	Small shops, intermittent use

Compared to the QT Series, the QGS offers quieter operation, longer service intervals, and better energy efficiency. While Atlas Copco’s G-Series may offer more advanced controls, the QGS hits a sweet spot for reliability and affordability.

Use Cases: Who Should Buy It (and Who Shouldn’t)

Ideal Buyers:

Automotive repair shops needing quiet, continuous air
CNC machining centers with high airflow demands
Packaging and bottling lines requiring consistent PSI
Facilities upgrading from piston compressors

Not Ideal For:

Small garages with intermittent use
Budget-constrained buyers needing basic air delivery
Users without access to authorized startup technicians

Quincy Compressor QSI Series FAQ

Is the Quincy QGS Series suitable for 24/7 operation?

How quiet is the QGS Series compared to piston compressors?

What maintenance does the QGS Series require?

Can I install the QGS Series myself?

Does the QGS Series come with a dryer?

What voltage options are available?

Is this compressor good for CNC machines?

How does the QGS Series compare to Quincy’s QT Series?

What’s the warranty coverage?

Can I monitor the QGS remotely?

Interesting Fact

Quincy’s QGS Series uses a proprietary synthetic lubricant that lasts up to 8,000 hours—nearly double the interval of many competitors.

Lesser-Known Fact

The TEFC motor in the QGS Series is IP55 rated, meaning it’s protected against dust ingress and low-pressure water jets—ideal for washdown zones and dirty environments.

Conclusion: Should You Buy the Quincy QGS Series?

If your facility demands quiet, reliable, and continuous compressed air, the Quincy QGS Series is a smart investment. It’s built for uptime, engineered for simplicity, and backed by a solid warranty—making it a standout choice for mid-sized manufacturers, CNC shops, and automotive operations.

Have you used the QGS Series in your workflow? Share your experience in the comments below and tag us on LinkedIn or Reddit to join the conversation. Your insights help other professionals make informed decisions—and spotlight the tools that keep industry moving.