Single Phase Rotary Screw Air Compressors

What Are Single Phase Rotary Screw Air Compressors?

A single phase rotary screw air compressor pairs the continuous-duty rotary screw mechanism with a 208-230 or 230V single phase motor, eliminating the need for three phase electrical service. This makes rotary screw technology available to auto repair shops, woodworking studios, and small fabrication operations that run on single phase power. Single phase rotary screw units range from 3 to 20 HP (EMAX Variable Speed) and deliver 10-80+ CFM depending on the model.

Tank Mount vs. Base Mount

The primary configuration choice for single phase rotary screw compressors is whether you need a tank mount or base mount system (To be Used with Separate Air Receiver).

Tank Mount Single Phase Rotary Screw Compressors

Tank mount units integrate the compressor, motor, and air receiver into a single package, simplifying installation and minimizing floor space. Most tank mount models in the single phase range pair with 60 gallon horizontal tanks and are available from 5 to 10 HP. The Quincy QGS 5 TMD-1 5 HP Single Phase Rotary Screw Air Compressor with Dryer is a tank mount configuration that also includes an integrated refrigerated dryer, making it a complete single-footprint air system.

Base Mount Single Phase Rotary Screw Compressors

Base mount units ship as a standalone compressor and motor assembly without a built-in tank, allowing the facility to connect a separately sized air receiver. This configuration offers flexibility for shops that already have a tank or need a larger receiver than what tank mount models include. Base mount systems are available from 5 to 20 HP in single phase.

With Dryer vs. Without Dryer

Many single phase rotary screw compressors are available with or without an integrated refrigerated air dryer.

Rotary Screw with Integrated Dryer

Models with a built-in dryer remove moisture from the compressed air before it enters the distribution line. This is important for paint spraying, powder coating, woodworking finishing, and any process where moisture causes defects. Integrated dryer models are factory-matched to the compressor's CFM output, so there is no risk of undersizing the dryer.

Rotary Screw without Dryer

Units without a dryer cost less upfront and allow the buyer to add a standalone dryer later if needed. This option is practical for operations where moisture is not a concern, such as tire inflation, blow-off, or running non-critical pneumatic tools.

Types of Single Phase Rotary Screw Air Compressors

3-5 HP Single Phase Rotary Screw

The entry point for rotary screw ownership. These compact units deliver 10-20 CFM at 100% duty cycle and serve small auto shops, home workshops, and light commercial applications. The KTC COMPACK 2 3 HP Single Phase Portable Rotary Screw Air Compressor is a uniquely portable option at this HP level, designed for mobile use.

7.5 HP Single Phase Rotary Screw

The most popular HP tier for single phase rotary screw compressors, delivering roughly 25-30 CFM. This size handles body work, sanding, painting, and most pneumatic tools in a multi-bay shop. The Elgi EN05-150-60T 7.5 HP Single Phase Rotary Screw 60 Gallon Tank Mount delivers 150 PSI and is a strong choice for shops that need higher working pressure.

10-20 HP Single Phase Rotary Screw

The upper range of single phase availability. These units deliver 35-80+ CFM and serve larger shops, multi-station operations, and facilities with heavier air demand. Variable speed options are available at this tier for operations with fluctuating demand. The EMAX ERV0200001 20 HP Single Phase Variable Speed Rotary Screw Air Compressor is the highest-HP single phase rotary screw unit in the catalog.

Key Specifications

• CFM (Cubic Feet per Minute): Single phase rotary screw compressors deliver roughly 10-80+ CFM depending on HP and model. All are rated for 100% duty cycle, meaning the CFM rating represents continuous output.
• HP (Horsepower): Available from 3 to 20 HP on single phase power. For higher HP requirements, three phase rotary screw compressors start at 5 HP and scale to over 100 HP.
• Max PSI (Pounds per Square Inch): Most models deliver 125-150 PSI. Some units offer a 150 PSI option for applications that need higher working pressure.
• Tank Capacity: Tank mount models typically include a 60 gallon horizontal receiver. Base mount systems connect to separately purchased tanks sized to the facility's needs.
• Noise Level (dBA): Enclosed single phase rotary screw compressors typically operate between 60 and 72 dBA, significantly quieter than reciprocating compressors of equivalent output.

Brands Carried

• Quincy: QGS series single phase rotary screw compressors from 5 to 7.5 HP, available in tank mount and base mount with optional integrated dryers.
• Elgi: EN series single phase models at 7.5 HP with 150 PSI output and extended maintenance intervals.
• Chicago Pneumatic: QRS series single phase rotary screw compressors from 3 to 7.5 HP in tank mount, base mount, and dryer-integrated configurations.
• ABAC: Single phase rotary screw compressors from 5 to 7.5 HP with optional dryers.
• Industrial Gold: Enclosed single phase rotary screw systems from 5 to 10 HP with optional integrated dryers. The Industrial Gold R101ENC3-CDR 10 HP Single Phase Rotary Screw with Dryer offers a 10 HP enclosed system with built-in air drying.
• EMAX: Single phase rotary screw compressors from 10 to 20 HP, including variable speed drive models for energy savings under fluctuating demand.

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FAQ

Can I run a rotary screw compressor on single phase power? Yes. Single phase rotary screw compressors are specifically designed for 230V single phase service. They are available from 3 to 20 HP, covering most small to mid-size shop requirements without the need for a three phase electrical upgrade.

What is the most common mistake when buying a single phase rotary screw compressor? Not verifying amperage draw against your electrical panel's capacity. Single phase motors draw more amperage than three phase motors of the same HP. A 7.5 HP single phase rotary screw compressor may require a 40-50 amp dedicated circuit. Check your panel's available capacity before ordering.

Is a single phase rotary screw compressor better than a piston compressor? For continuous-duty applications, yes. A rotary screw runs at 100% duty cycle, produces less noise, and requires less frequent maintenance. If your shop runs air tools for most of the workday, a single phase rotary screw will outperform a similarly sized piston compressor in efficiency and longevity.

How often does a single phase rotary screw compressor need maintenance? Most manufacturers recommend oil and filter changes every 2,000-4,000 hours, with air/oil separator replacement at 4,000-8,000 hours. This is significantly less frequent than the maintenance intervals on reciprocating compressors.

Should I get a rotary screw with or without a dryer? If you spray paint, do finishing work, or run moisture-sensitive processes, an integrated dryer is worth the investment. For general shop air (impact wrenches, blow-off, inflation), you can start without a dryer and add a standalone unit later if moisture becomes an issue.

Does CompressorPros offer free shipping on single phase rotary screw compressors? Yes. All orders ship free, direct from the manufacturer, on every unit in this category.

Shop Single Phase Rotary Screw Air Compressors at CompressorPros

CompressorPros carries single phase rotary screw air compressors from 3 to 20 HP in tank mount and base mount configurations, with and without integrated dryers. For facilities with three phase power, three phase rotary screw and variable speed models extend the range well beyond 20 HP. For noise-sensitive installations, browse the quiet rotary screw selection. All orders ship free, direct from the manufacturer.

If you need help choosing a single phase rotary screw compressor for your shop, call (803) 339-0445 or email info@compressorpros.com.