Best Rotary Screw Air Compressors Reviewed – Portable & Stationary

Best Rotary Screw Air CompressorsRotary screw compressors are the workhorses of the industry.  If you see a big construction site, there’s a good chance there is a rotary screw air compressor powering the construction process. The reason for these compressors’ popularity is their low wear-and-tear. 

However, the units with smaller rotor sizes have this inherent leakage in the and are thus less practical than piston compressors where a smaller job needs to be done.

In the sections below we shall have a look at the best rotary screw air compressors for industrial use.

Product nameManufacturerPsi MaxTank SizeHPCFMBest Application/UsePrice
GX4Atlas Copco150 53 Gallons 516.5For small & medium sized industriesMore Details
230 V Single Phase Rotary Screw Air Compressor Ingersoll Rand 125807.528Medium-sized to industrial-scale jobs.More Details
QGV-40Quincy 75-150Not specified 40180 ACFM Variable speed unit for heavy-duty jobsMore Details
FAS6UFirst Air150 53 Gallons7.523.4 Rotary Screw Air Compressor with DryerMore Details
RS140GEC30CAS150 30 Gallons 1320.5 Portable, suitable for mining and other heavy-duty jobsMore Details
50 HP Rotary Screw Air CompressorEaton Compressor 145Works with multiple tank sizes50 235 at 100 PSI High power 50 HP, suitable for heavy-duty construction jobs.More Details
15-HP Tankless Rotary Screw Air CompressorEMAX 150No tank15 62 Medium power 15 HP, copes well with industrial jobs. More Details
G7P 125Atlas Copco 40 125 120 Gallons1040Low power 10 HP, suitable for light construction jobsMore Details
QRS 5 HP Rotary Screw Air CompressorChicago Pneumatic175 60 Gallons516.6Ultra-low Power 5. HP, for quiet operation in the home or the garage.More Details
Mini Rotary Screw Air Compressor KAISHAN115 Not specifiedNot specified 126Small Rotary Screw Air Compressor for your paint shopMore Details
BR755-01BelAire 150 60 Gallons7.5 21.2 Industry-related jobsMore Details
HDD-22HERTZ 15060 Gallons317.26Rotary screw air compressor for home shopMore Details

What Is a Rotary Screw Air Compressor?

A rotary-screw compressor is a type of air compressor equipped with a rotary-type positive-displacement mechanism.

They have been invented as an alternative to traditional piston compressors that use large volumes of high-pressure air

The gas compression process by means of a rotary screw generates insignificant pulsation or surging of flow that is very common in piston compressors.

For this reason, screw compressors are also much quieter and generate less vibration than their piston rivals.

Rotary screw air compressors are most efficient in large industrial applications or to power up huge air tools such as gigantic jackhammers and massive impact wrenches.

An industrial rotary screw compressor has a 100% duty cycle.  It can operate 24/7 without a break, and it is meant to be used that way.

the heart of every such unit is the rotary-type positive-displacement mechanism, which has become a viable alternative to the traditional piston.

1. Atlas Copco GX4 5-HP 53-Gallon Rotary Screw Air Compressor (230V 1-Phase)

This model by one of the largest compressor manufacturers Atlas Copco is a powerful and reliable solution for many small and medium-sized industries.

It can operate in the desert, where temperatures often reach as high as 46 C. 

Moreover, the pace of its rotary screw adjusts according to the amount of air required to power up the specific tool.

Thus, GX4 is one of the most economical 5-HP air compressors currently available on the market. This unit’s tank size is 53 gallons and it produces 16.5 CFM at 150 PSI.

Pros

  • Heavy-duty belt drive
  • Low-noise rotary technology
  • Space-saving horizontal tank

Cons

  • No electronic drain valve

2. Ingersoll Rand Rotary Screw Air Compressor

Ingersoll Rand Rotary Screw Compressor - 230 VoltsDespite its horizontal tank, this 230 V, single-phase rotary screw air compressor by one of the market leaders Ingersoll Rand has a very compact design.

At the same time, its 7.5 HP ODP electric motor generates 28 CFM at 90 PSI, while the PSI max has been set at 125.

Yet, its relatively small tank of just 80 gallons makes this model of Ingersoll Rand unsuitable for large-scale industrial jobs, which require a lot of compressed air.

Rather, this is the choice of the car painter or the local handyman.

In addition to the single-phase, version, there is also a three-phase modification of the same model.

Before the operation, it should be fixed to the ground or other flat surfaces with massive screws and rubber pads to avoid vibration.

Pros

 

  • Quiet operation
  • A steady output of compressed air
  • Minimum maintenance required

Cons

 

  • Relatively high retail price 

 

3. Quincy Rotary Screw Air Compressor

Quincy QGV-40 Rotary Screw Air CompressorQuincy’s QGV-40 rotary screw air compressor has a powerful 40-HP, 460 V electric motor that generates up to 180 ACFM at 75-150 PSI. 

The variable screw speed option makes it perfect for large, as well as small jobs.

At the heart of all of Quincy’s QGV®️ compressors is a flex-drive air-end with a 100000-hour design that guarantees easy maintenance and reliable operation.

As this is a tank-less unit, it can hold pressure +/- 2 psi. because of its quiet operation at about 68 DB, this model is suitable for use at home and in urban areas. All QGV compressors come with a 10-year exclusive warranty.

Pros

 

  • Adjustable screw rotation for added versatility
  • 10-year royal warranty
  • Very quiet operation at 68 DB

Cons

 

  • No tank 

4. Rotary Screw Air Compressor With Dryer 

Rotary Screw Air Compressor With Dryer First Air’s rotary screw air compressor boasts an ergonomic design, well-balanced performance, and unprecedented versatility.

Its 53-gallon horizontal tank is conveniently placed below the engine and the control panel, so as to save maximum space in the workshop.

Although it can also cope with some industrial applications reasonably well.

This unit has no wheels and has to be fixed to its fundament with bolts or massive screws.

Still, its high-quality components ensure the compressor’s durability even when put to work 24/7.

Thanks to its very efficient cooling system, it works without a problem at temperatures reaching 45 C.

This rotary screw air compressor with dryer is equipped with energy-efficient driving motors class IE3 that generate a total of 7.5 HP.

It also has protection class IP55, and insulation class F.

When in operation, the unit’s noise level is up to 65 DB. 

Few components are more important to a rotary screw compressor’s life than the filter.  FAS6U’s high-performance filter prevents contaminants from entering the air system.

At the same time, the air dryer condenses the air to remove airborne moisture, dirt, and oil before it enters the compressor.

Pros

 

  • Efficient cooling system
  • High-quality air filter
  • Energy-efficient electrical motors

Cons

 

  • 1-year factory warranty on the parts only

RS140GEC305. Portable Rotary Screw Air Compressor

The RS140GEC30 model portable air compressor by CAS is a true air beast! Its heart is a perfectly-built 13-HP Honda engine that generates 20.5 CFM at 150 psi.

This CAS portable screw compressor has been designed for the most demanding portable compressor jobs. 

The screw air end is designed to take years of service in long duty cycle applications.

If your job demands high cfm output in a compact design, the CAS portable screw compressor is built just for you! 

To save energy, this unit’s electric-start motor idles when unloaded, while the 30-gallon tank holds enough air to power up most of the tools on the building site. 

The rotary screw, one of the compressor’s most important components is made in Germany with absolute precision and attention to the tiniest detail!

The compressor’s NK 30 pump generates the mind-blowing 3,000 rotations per minute.

Pros

 

  • Super-reliable Honda engine
  • German-made airscrew
  • Electric-start motor idles when unloaded

Cons

 

  • The price is a bit too high for a portable unit

50 HP Rotary Screw Air Compressor6. 50 HP Rotary Screw Air Compressor

Eaton Compressor’s 50-HP rotary screw air compressor is a true industrial gem. Its heart is the 3-phase, gear-driven, fixed-speed electric motor.

The Direct-drive function reduces the workload on the pump and the motor drive bearings. This eliminates the need for belt maintenance.

The company’s Y/DeltaSoftStart system limits the voltage on startup, making this unit one of the most energy-efficient rotary screw air compressors that money can buy.

In fact, this system reduces energy demand by one-third.

The Tamrotor/GardnerDenver rotary air end is designed with precision in mind. Moreover, it is covered by one of the longest warranties in the compressed air industry – a full decade!

The other parts of the compressor are covered by a 5-year warranty, which is well above the average warranty in the sector.

The compressor’s smooth operation is guaranteed by the PLC controller. It monitors temperature, oil level, and filtration, and alerts the operator if maintenance is required.

When in use, this compressor is surprisingly quiet (79 DB). Yet, it generates 235 CFM and 100 PSI, while the PSI max is set at 145. 

Pros

 

  • Very long warranty
  • Extremely energy-efficient
  • Very quiet operation

Cons

 

  • Not enough info about tank sizes

 

15 HP Rotary Screw Air Compressors7. 15 HP Rotary Screw Air Compressor

EMAX’s ERV0150003-208 model is a tankless rotary screw air compressor with a 15-HP, 3-phase variable-speed electric motor.

As per the manufacturer’s information, this unit is great for industrial and manufacturing applications.

This is so because it has low energy demand and amp draw on startup.

The Spin-Tek system, unique for this manufacturer, provides easy access to the compressor’s oil filters and air/oil separators.

This unit is designed to be used with a stationary air receiver. At the same time, we were surprised to find out that it is bought separately.

The situation with this compressor’s warranty is very interesting, indeed. The air end and the pump are covered for a full decade.

Then, there is a 5-year warranty on the cabinet and the motor. Finally, all of its electric parts are protected for two years. Please note that SERVICEKIT003 Maintenance Kit required to validate warranty coverage.

Pros

 

  • Great productivity for a 15-HP unit
  • The design allows for easy maintenance
  • Economical and quiet

Cons

 

  • Stationary air receiver not included in the package 

10 HP Rotary Screw Air Compressors8. 10 HP Rotary Screw Air Compressor

Atlas Copco’s G7-125 model is equipped with a 120-gallon, horizontal tank located right under the cabinet.

This rotary screw air compressor is built from the best parts and materials to provide a 100% duty cycle for long periods of time. 

It delivers 40 cfm at 125 psi from its 10-hp motor. The rotary screw elements are designed to be efficient and quiet.

In addition, the sound dampening enclosure further reduces noise levels.

As a three-phase compressor, the G7 is designed to function with most power tools.

 It comes complete with a 2-year end-to-end warranty from Atlas Copco on the parts and service.

The compressor’s topside cooling system guarantees low energy costs and a relatively small footprint.

Please note that in some sources the warranty is listed as “one-year bumper-to-bumper”.

Pros

 

  • Quiet operation
  • 100% duty cycle
  • Low energy costs

Cons

 

  • Does not have a variable speed function

 

5 HP Rotary Screw Air Compressor 60 Gallon9. 5 HP. Rotary Screw Air Compressor

Chicago Pneumatic’s QRS model is our top choice in the 5 HP class. It comes with a 60-gallon tank and a 230-Volt, Single-phase electric motor.

You can’t expect it to generate enough power to perform construction site jobs reasonably well. Instead, you should use it in your tire shop, service shop, paint shop or your garage. 

We found out that QRS actually stands for “Quiet Rotary Screw”. When in use, this compressor makes just 62 DB of noise.

Still, its TEFC motor generates 16.6 CFM at 150 PSI, while the maximum PSI is set at 175.

The sixty-gallon tank has to be drained manually. We were surprised by this minor inconvenience, as most other models are equipped with an automatic tank drain system.

The standard factory warranty on this unit is one year. If you want a longer warranty, you’ve got to pay extra.

Pros

 

  • Manufactured with precision from top-quality materials
  • Very quiet operation
  • Perfect for use at home or in the garage

Cons

 

  • The owner has to pay extra for an extended warranty 

126 CFM Mini Rotary Screw Air Compressor10. Small Rotary Screw Air Compressor

KAISHAN’s 126 CFM Mini Rotary Screw Air Compressor is for those who want to shop on a budget. If you trust the Chinese way of making machines, this little boy is for you.

This is an oil-free unit that delivers 3.6m³/min / 126cfm, 2.7m³/min / 95cfm, and 3.2m³/min/112cfm.

It’s working pressure is: 0.8mpa/ 8 bar/ 115psi and the shipping weight is just 700 kg, which is very light for a rotary screw air compressor, mind you!

KAISHAN has commissioned the US company SKK to manufacture their compressor’s air end. Similarly, Austria’s Hoerbiger has manufactured this unit’s intake valve/

So, you should not worry about build quality, if you are planning to buy this model.

Pros

 

  • Available in 3 modifications depending on your specific air needs
  • Very detailed tech specs provided by the manufacturer
  • The contact form at the bottom allows you to quickly place an order

Cons

 

  • KAISHAN still isn’t among the big names in the field of rotary screw air compressors

11. Industrial Rotary Screw Air Compressor

BelAire BR75501 230-Volt 7.5-HP 60-Gallon Rotary Screw Air CompressorsBelAire’s BR75501 is our choice in the industrial rotary screw air compressor class. And this fat boy is really built to supply compressed air to big tools working on large scale projects.

Its heart is a 230-V 7.5-HP electric motor, whose output is just massive! It generates 21.2 cfm at 150 PSI.

At the same time, the sixty-gallon tank stores just enough air for the needs of most industries.

This rotary screw air compressor by BelAire is built to provide reliable and efficient compressed air for the industry.

This rotary screw compressor allows for 100% duty and extremely quiet operation.

Pros

 

  • Reasonable productivity
  • High-quality build
  • Suitable for heavy-duty industrial use where 100% duty cycle is required

Cons

  • We are not sure that the 60-gallon tank is the right one for this model

 

HDD Series12. Rotary Screw Air Compressor for Home Shop

Hertz’s HDD-22 is the smallest representative of their HDD product line and that’s why we selected it for your home shop.

Frankly speaking, you do not really need a rotary screw air compressor for your DIY projects. Better buy a much-cheaper piston compressor!

The best features of this model include durable and efficient power transfer thanks to the use of elastic coupling.

The coupling system itself can be set up in just half an hour. The PTC motor bearings and windings protect the electric motor of this compressor from overheating.

The cooling system consists of silent and slow-speed radial fans that are controlled with secondary fan inverter and independent radiator segments.

If you are planning to save on heating during the winter, this compressor has got an oil tank heater for cold environments.

Pros

 

  • The list of features and extras is really long
  • We were really impressed with the oil tank heater
  • Efficient power transfer for maximum productivity

Cons

  • Warranty period not specified

 

Head-to-head Comparison

In the paragraphs below, we are going to draw a head-to-head comparison between the rotary screw air compressor and its closest competitors – the piston compressor, the centrifugal compressor, and the rotary tooth compressor. 

1. Rotary Screw Air Compressor vs Piston Compressor

The two most popular types of compressors are rotary screw air compressors and reciprocating (or piston) air compressors.

To begin with, piston compressors are far more affordable with retail prices starting at $100 or $200. By contrast, rotary screw compressors are generally pricier, with retail prices starting at $5,000.

Therefore, piston compressors are more suitable for DIY projects and home use, while rotary screw compressors are mostly used in the industry.

The former type of compressors is capable of maintaining a 100% duty cycle over a shorter period of time. The latter type can maintain a 100% duty cycle for longer.

Finally, rotary screw compressors are generally quieter than the ones with pistons.

FeatureRotary Screw CompressorsPiston Compressors
Pace of operation++++++++
Price+++++++
Operation cycle+++++++++
Required maintenance+++++++
Capacity++++++++

 2. Screw Compressor vs Centrifugal Compressor

A centrifugal compressor is a radial flow rotodynamic fluid compressor that uses air as the working fluid. Centrifugal compressors use very high-speed spinning impellers (up to 60,000 rpm) to accelerate the air. 

Then the diffusers in the device slow the airflow down. 

This process, called dynamic compression, uses velocity to cause an increase in pressure.

Generally, these compressors have intercoolers between each stage to cool the air as well as remove 100% of the condensate to avoid impeller damage.

FeatureRotary Screw Compressors Centrifugal Compressors
Maximum PSI175Up to 1,200
HP 50500
Operation cycle+++++++++
Required maintenance+++++++
Capacity+++++++++

3. Rotary Tooth Compressor vs Rotary Screw Compressor

The rotary tooth compressors are displacement compressors that have two rotors, male and female. These rotors move in opposite directions within the compression chamber.

They are controlled by a set of gear wheels to guarantee optimal compression. 

As the rotors turn toward each other, they draw in air. Intake stops once the rotors have turned to completely block the inlet port.

Rotary tooth compressors are mostly used to supply extremely pure compressed air to labs and hospitals.

FeatureRotary Screw Compressors Rotary Tooth Compressors
Quality of compressed airNot suitable for hospital useSuitable for hospital use
Energy efficiencyAverageHigh
Operation cycle+++++++++
Required maintenance+++++
Capacity++++++++++

Continuous & Uninterrupted Supply

RS140GEC30Rotary screw compressors are designed to provide a continuous and uninterrupted supply of compressed air to industrial and construction sites, paint shops, and other businesses. They are relatively expensive and also quite heavy.

For these reasons, we do not recommend you buying one of the bad boys reviewed in the sections above for your home or garage.

Most of the models discussed above are powered by single or multi-phase electric motors, but there are special models that can run on different fuels.

Including gasoline and diesel. Their PSI max ranges between 150 and 175, while the CFM varies between 16 and 235. 

While all piston air compressors require a tank to store the compressed air, in the big table above we can see some tankless models.

As per the table, the leading manufacturers of rotary screw air compressors are Ingersoll Rand, Quincy and Atlas Copco.

AircompressorsUSA Team

AircompressorUSA Team is full of diverse writers from different industries. Our team includes small business contractors, assembly line managers, scuba shop owners, garage owners & More. Our Team makes every effort to provide the most accurate information to our readers and buyers.

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