Rotary Screw Oil-Free Compressors

No matter what the application, Ingersoll Rand rotary screw oil-free air compressors provide 100% oil-free air in all operating conditions to reduce costly downtime, product liability and damage to your brand reputation.

Reliability: Precision-machined, stainless-steel rotors with UltraCoat protection; Aluminum moisture separator and stainless steel air seals prevent corrosion.  The Variable Speed Compressor option features a Hybrid Permanent Magnet (HPM) motor with fewer rotating parts

Productivity: 115ºF (46ºC) ambient rating reduces nuisance shutdowns due to high heat or dirty conditions; Air or water-cooled packages;

Efficiency : ISO Class 0 100% oil-free air under all operating conditions, certified by TÜV Rheinland®; Available HPM motor requires less power at start-up and never operates unloaded, increasing efficiency; Variable speed compressor operates at 95% efficiency throughout its entire speed range with no increase in power consumption, reducing lifecycle energy costs.


The Choice is Yours

Air-cooled & Water-cooled Options
Intuitive Controller with Remote Access
Variable Speed Drive
Dual Drive Digital Gearbox
Integrated Heat Recovery Option
Silicone-free Air


Download brochures:

Ingersoll Rand 37-160 kW Oil Free  – Nirvana range

Ingersoll Rand E-Series 75-160 kW Oil Free – NEW to market (see below)

Ingersoll Rand 185-355 kW Oil Free – (Big E-Series)

E-Series Oil Free Compressors – For the Lowest Total Cost of Ownership

With the new Ingersoll Rand E Series Oil Free VSD Air Compressor, Ingersoll Rand has established a clear advantage in the race for Energy Efficient Oil Free Air Compressors with the Lowest Cost of Ownership. The E Series is the only Oil Free Air Cooled Compressor on the market today with Heat Recovery as an Option.

Learn about the new Ingersoll Rand E-Series 75-160 kW (100-200 hp) Oil-Free Rotary Screw Air Compressors and how they utilize state-of-the-art design features to provide unparalleled energy efficiency, superb reliability, and risk-free operation:

  1. Watch the video below
  2. Check out the Launch Product Tour


Ingersoll Rand E Series

Ingersoll Rand’s Sierra & Nirvana Range

Fixed Speed

Looking for a rugged and reliable oil-free air compressor? Ingersoll Rand’s Sierra Oil-Free rotary screw compressor is just the unit for you. With Ingersoll Rand’s unmatched reputation for reliability and performance to count on, oil-free customers can enjoy the peace of mind so difficult to come by given their vital process and application needs.

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Variable Speed

The Nirvana Oil-Free air compressor, with a matching standard variable speed inverter and HYBRID PERMANENT MAGNET ™ MOTOR coupled with a time-proven, oil-free, compression module, represents a stunning advance in compressor technology. The Nirvana Oil-Free rotary compressor provides unparalleled energy efficiency at all speeds and offers superb reliability. There are no motor bearings, pulleys, belts, couplings or motor shaft seals to wear out, leak or need replacing. Nirvana will lower your operating costs with its dynamic efficiency. Nirvana Oil-Free offers truly transcendent technology.

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Contact For Services

Limerick Office

Telephone: +353 (0)61-313888
Fax: +353 (0)61-314116

Cork Office

Telephone: +353 (0)21-4351137
Fax: +353 (0)21-4351143

Email us for product information, pricing, service and availability

What Is a Rotary Screw Compressor?

A rotary screw compressor features two meshed rotors that trap air between them and reduce its volume. This process generates compressed air for various industrial and manufacturing purposes. The machine contains two helical-shaped rotary screws, which are positive displacement mechanisms that produce compressed air in a continuous, sweeping motion.

Rotary screw compressors produce less pulsation than reciprocating/piston compressors and other versions. They provide massive volumes of compressed air and can function well in all types of weather conditions. These compressors also offer excellent energy efficiency and are easy to maintain.

Rotary screw air compressors can be oil-free (as per above) or oil-flooded. See our range of oil-flooded rotary screw compressors here.

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