Oil-free screw compressors

Oil-free screw compressors

ZT 110-160 Classic: Oil-free air rotary screw compressors, 110-160 kW / 147-214 hp.

Customer benefits

  • Keeping your production up and running – For over 50 years, Atlas Copco Z compressors have set the benchmark for durability. They are built using long-standing internal engineering practices, and are designed, manufactured and tested according to ISO 9001. The ZT 110-160 uses proven screw technology, cooling and pulsation dampers.
  • Protecting your reputation – The ZT 110-160 provide you with 100% pure, clean air that complies with ISO 8573-1 CLASS 0 (2010) certification. This means zero risk of contamination; zero risk of damaged products; zero risk of losses from operational downtime; and zero risk of damaging your company’s hard-won professional reputation.
  • Driving down energy costs – The ZT 110-160’s superior oil-free screw elements provide the optimum combination of high Free Air Delivery (FAD) with low energy consumption. Ample sized cooling, low pressure drops and an efficient drive train result in high compressor package efficiency.
  • Easy installation – With the ZT 110-160 compressor, Atlas Copco provides a complete solution without hidden costs. The ready-to-use package includes internal piping, coolers, motor, lubrication and control system. Installation is fault-free, commissioning time is low and no external instrument air is required. You simply plug and run.
  • Assuring your peace of mind – From the factory to the field, Atlas Copco has the expertise and products, service and support to meet customer demands. We invest continuously to ensure a committed, competent service organization. Thanks to our presence in over 170 countries we offer timely, professional service worldwide with 24/7 availability.

Atlas Copco is renowned for designing and manufacturing the most reliable oil-free screw compressors. The ZT 110-160 is the latest rotary screw compressor to come out of this strong tradition. Ideal for harsh conditions, the ZT offers a compact robust design and low operating cost to industries where high-quality oil-free air is key.

Technical Specifications
Capacity FAD (l/s) 259.6 – 416 l/s
Capacity FAD (m³/h, cfm) 15.6 – 25 m³/h
Working pressure 7 – 10.4 bar(e)
Installed motor power 132 – 160 kW

ZE/ZA (VSD): Oil-free rotary screw compressors, 22 – 500 kW/ 30 – 700 hp

Customer benefits

  • Highest reliability – ZE/ZA compressors stand for durability and reliability. They incorporate Atlas Copco’s proven screw technology, stainless steel coolers, AGMA A4/DIN 5 gears and state-of-the art electrical drive systems, all of which contribute to overall high reliability. ZE/ZA compressors are built using long-standing internal engineering practices, and are manufactured and tested according ISO 9001.
  • Certified 100% oil-free – ZE/ZA compressors provide you with 100% pure, clean air that complies with ISO 8573-1 CLASS 0 (2010) certification. CLASS 0 means zero risk of contamination; zero risk of damaged or unsafe products; zero risk of losses from operational downtime; and zero risk of damaging your company’s hard-won professional reputation. In 2006 Atlas Copco was the first manufacturer in the world to receive such certification on an oil-free compressor.
  • Reduced energy costs – With an air circuit designed to avoid and reduce pressure drops, the ZE/ZA is built to save energy. Features like VSD drive, a state-of-the-art oil-free compression element, and energy recovery greatly enhance energy savings.
  • Easy installation – The compact design eliminates the need for extras and reduces installation to an absolute minimum, saving you time and money. Built for easy integration in your existing compressed air network, ZE/ZA compressors are up and running in no time.

Especially in harsh and dusty environments, a reliable supply of 100% certified oil-free compressed air is critical to ensure production continuity. Atlas Copco’s low pressure ZE/ZA compressors fulfill this demand by offering a constant air flow at minimal energy costs. Integrated Variable Speed Drive (VSD) variants offer up to 35% extra energy savings by automatically tuning compressor flow to the precise air demand.

Technical Specifications
Capacity FAD (l/s) 67 – 2105 l/s
Capacity FAD (m³/h, cfm) 241 – 7578 m³/h
Working pressure 1 – 4 bar(e)
Installed motor power 22 – 500 kW

Z 55-900 (VSD): Oil-free air- and water-cooled rotary screw compressors, 55-935 kW / 75-1253 hp.

Customer benefits

  • Highest reliability – For over 50 years, Z compressors stand for durability and reliability. They incorporate Atlas Copco’s proven screw technology, stainless steel coolers, AGMA A4/DIN 5 gears and state-of-the art electrical drive systems, all of which contribute to overall high reliability. Z compressors are built using long-standing internal engineering practices, and are manufactured and tested according ISO 9001.
  • Certified 100% oil-free – Z 55-900 compressors provide you with 100% pure, clean air that complies with ISO 8573-1 CLASS 0 (2010) certification. CLASS 0 means zero risk of contamination; zero risk of damaged or unsafe products; zero risk of losses from operational downtime; and zero risk of damaging your company’s hard-won professional reputation. In 2006 Atlas Copco was the first manufacturer in the world to receive such certification on an oil-free compressor.
  • Maximum energy savings – Atlas Copco’s unique and time proven rotor coating ensures high efficiency over the compressors lifetime. The state-of-the art air compressor element is powered by a high-efficiency electric motor, contributing to maximum compressor package efficiency. Further optimize your energy savings with our innovative and unique Variable Speed Drive, our energy recovery feature and energy-free MD dryers.
  • Easy installation – The integrated design of the Z compressor includes internal piping, coolers, motor, lubrication and control system: all supplied as a ready-to-use package. Installation is fault-free, commissioning time is low and no external instrument air is required.
  • Advanced control and monitoring – To maximize efficiency and reliability, the Elektronikon® controls the main drive motor and regulates system pressure within a predefined and narrow pressure band. The Elektronikon® controller can be adapted to your specific needs with extra sensors, digital contacts, fieldbus, Internet and SMS communication functions. In combination with the ES multiple compressor controller, the operation of your complete compressor room is optimized.

Atlas Copco’s Z 55-900 VSD Pack and Full Feature ranges power your production with ultimate reliability and efficiency under the harshest conditions. The first air compressors in the world to be certified Class 0 according to ISO 8573-1 edition 3, 2010, they ensure completely oil-free air to protect your process and end products. Several energy saving features – Variable Speed Drive, energy-free MD dryers and energy recovery – are offered. Z 55-900 VSD compressors are all-inclusive, plug-and-play packages that ensure easy and low cost installation and a quick start-up.


Technical Specifications
Capacity FAD (l/s) 121 – 2456 l/s
Capacity FAD (m³/h, cfm) 436 – 8842 m³/h
Working pressure 7.5 – 10.4 bar(e)
Working pressure variant 13 bar 110 – 275 kW
Installed motor power 55 – 935 kW

ER 90-900: Energy recovery control unit for water-cooled oil-free air compressors from 90 to 900 kW.

Customer benefits

• Specifically designed to transfer the energy recovered from the oil-free compressor to your process.
Ultimate reliability under the harshest operating conditions.
• Single interface between your compressed air system and your process.
Regulation of compressor cooling water pressure and temperature to keep the compressed air system working optimally.
• Compressors operate independently from your heat requirement process.
• Easy to guarantee optimal quality of cooling water from compressor(s).
Up to four ZR compressors can be connected to one energy recovery control unit.
• Standard set-up can be extended with a number of application specific options.
• Designed, manufactured and tested in accordance with ISO 9001 and ISO 1400.
• Superior quality by design ensures long and trouble-free life at the lowest operating costs:
o Stainless steel plate heat exchangers.
o Variable-speed driven pumps.
o State-of-the-art control system.
• Maximum efficiency and reliability:
o Elektronikon® controller can be adapted to specific needs with digital contacts, fieldbus, Internet and SMS communication functions.

Atlas Copco energy recovery control units transfer the energy recovered in the cooling water of oil-free air compressors to your process. The control unit is installed between the compressor and your cooling and heating circuit. The design ensures perfect and easy integration of energy recovery systems in a wide variety of different applications.

AQ 30-55 / 15-55 VSD: Water-injected screw compressors, 15-55 kW / 20-75 hp.

Customer benefits

  • High efficiency – Thanks to the superior cooling capability of water which ensures that the heat is removed efficiently at the source, more air per kW of power is generated. Energy savings of up to 35% are possible with the Variable Speed Drive versions:
    – Load/no load transition losses are eliminated.
    – Precise pressure control allows a tighter pressure band and a lower average working pressure, resulting in reduced energy consumption.
  • Certified 100% oil-free air – AQ compressors provide 100% pure, clean air, complying with ISO 8573-1 CLASS 0 (2010) certification. CLASS 0 means zero risk of contamination; zero risk of damaged or unsafe products; zero risk of losses from operational downtime; and zero risk of damaging your company’s hard-won professional reputation. In 2006, Atlas Copco was the first manufacturer in the world to receive such certification for an oil-free compressor.
  • Quiet operation – AQ compressors are supplied in a sound-insulated canopy, thus avoiding the need for a separate compressor room and allowing installation in most working environments.
  • Advanced control and monitoring – To maximize efficiency and reliability, the Elektronikon® controls the main drive motor and regulates system pressure within a predefined and narrow pressure band. The Elektronikon® controller can be adapted to your specific needs with extra sensors, digital contacts, fieldbus, Internet and SMS communication functions. In combination with the ES multiple compressor controller, the operation of your complete compressor room is optimized.

Atlas Copco’s AQ water-injected screw compressors, available in water-cooled and air-cooled versions, meet your precise needs for pure, oil-free air while offering high-pressure capability and improved energy efficiency. Developed especially for applications demanding the highest levels of purity, such as pharmaceutical production, food processing and critical electronics, AQ compressors eliminate the risks of oil contamination as well as the resulting extra costs. They ensure consistent 100% oil-free air while you benefit from lower operating and maintenance costs with an ISO 8573-1 CLASS 0 (2010) certified compressor.

Technical Specifications
Capacity FAD (l/s) 21.9 – 161.7 l/s
Capacity FAD (m³/h, cfm) 1.3 – 9.7 m³/h
Working pressure 7.4 – 13 bar(e)
Installed motor power 15 – 55 kW