Oil-Free Air Compressors 2018-02-12T13:25:55+00:00

Oil-Free Air Compressors


Oil-Free Air Compressors come in multiple designs. Oil-Free Rotary Screw is a type of gas compressor that uses a rotary-type positive-displacement mechanism. They are commonly used to replace piston compressors where large volumes of high-pressure air are needed, either for large industrial applications or to operate high-power air tools such as jackhammers.

The gas compression process of a rotary screw is a continuous sweeping motion, so there is very little pulsation or surging of flow, as occurs with piston compressors.

In an Oil-Free rotary compressor, the air is compressed entirely through the action of the screws, without the assistance of an oil seal. They usually have lower maximal discharge pressure capability as a result. However, multi-stage oil-free compressors, where the air is compressed by several sets of screws, can achieve pressures of over 150 psi (10 atm) and output volume of over 2,000 cubic feet per minute (57 m3/min).

Oil-Free scroll compressor (also called spiral compressorscroll pump and scroll vacuum pump) is a device for compressing air or refrigerant.  A scroll compressor uses two interleaving scrolls to pumpcompress or pressurize fluids such as liquids and gases. The vane geometry may be involuteArchimedean spiral, or hybrid curves.  Often, one of the scrolls is fixed, while the other orbits eccentrically without rotating, thereby trapping and pumping or compressing pockets of fluid between the scrolls. Another method for producing the compression motion is co-rotating the scrolls, in synchronous motion, but with offset centers of rotation. The relative motion is the same as if one were orbiting.

Oil-Free Air Compressors are used in applications where entrained oil carry-over is not acceptable, such as medical research and semiconductor manufacturing. However, this does not preclude the need for filtration, as hydrocarbons and other contaminants ingested from the ambient air must also be removed prior to the point of use. Subsequently, air treatment identical to that used for an oil-flooded screw compressor is frequently still required to ensure a given quality of compressed air.

Atlas Copco’s ZR/ZT oil-free rotary tooth compressors meet your needs for pure oil-free air while offering wide pressure ranges and improved energy efficiency. Developed especially for applications demanding the highest levels of purity, such as pharmaceutical production, food processing and critical electronics, ZR/ZT compressors eliminate the risks of oil contamination as well as the resulting extra costs. These ISO 8573-1 CLASS 0 certified compressors are easy to operate and are available with Variable Speed Drive for further energy savings.


Customer benefits

  • Certified 100% oil-free air – ZR/ZT 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.
  • VSD for direct energy savings – Energy savings of up to 35% are possible with the Variable Speed Drive versions:
    – Unload losses are reduced to a minimum.
    – No blow-off of compressed air to the atmosphere.
    – 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.
  • Quiet operation – The vertical layout of the coolers reduces the noise levels from the fan, motor and element. Moreover, ZR/ZT 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.
  • Easy maintenance – The robust air inlet filter offers a long lifetime and high reliability for long service intervals and low maintenance needs.

Technical data:

  • Capacity FAD (l/s): 19.7 – 142.5 l/s
  • Capacity FAD (l/s, m³/min):1.18 – 8.55 m³ cfm
  • Working pressure: 109 – 145 psig
  • Installed motor power: 20 – 75 HP

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Atlas Copco’s ZR/ZT 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. ZR/ZT VSD compressors are all-inclusive, plug-and-play packages that ensure easy and low cost installation and a quick start-up.


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 – ZR/ZT 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.

Technical data:

  • Capacity FAD (l/s): 120 – 262 l/s
  • Capacity FAD (m³/h, cfm) – 7.2- 15.7 cfm
  • Working pressure: 101.5 – 150 psig
  • Installed motor power: 75 – 100 HP

CLICK HERE TO FIND OUT MORE

Atlas Copco’s ZR/ZT 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. ZR/ZT VSD compressors are all-inclusive, plug-and-play packages that ensure easy and low cost installation and a quick start-up.


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 – ZR/ZT 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.

Technical data:

  • Capacity FAD (l/s): 131 – 2456 l/s
  • Capacity FAD (m³/h, cfm) – 256 – 5204 cfm
  • Working pressure: 147 – 369 psig
  • Installed motor power: 75 – 1253 HP

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Atlas Copco’s SF oil-free scroll compressors provide 100% oil-free for critical applications in industries such as R&D laboratories, hospitals, universities, dental applications, food & beverage. These ISO 8573-1 CLASS 0 certified compressors are easy to operate and maintain, and have a minimal footprint to save space in your facility. SF compressors eliminate the risks of oil contamination while providing an efficient, reliable and cost-effective source of pure oil-free air.


Customer benefits

  • Certified 100% oil-free air – SF(+) 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.
  • Extremely quiet operation – The slow speed of the scroll compression elements ensures that the SF scroll compressors are exceptionally quiet. With sound levels as low as 53 B(a), the SF is the perfect choice for your sensitive working environment.
  • Energy efficiency – The SF scroll compressors, standard equipped with IE3 Premium efficiency motors, are suited for sensitive applications which require flexibility and energy efficiency. Unloaded power consumption is eliminated thanks to the simple start/stop control. Advanced scroll technology guarantees an optimal free air delivery and low duty cycle applications.
  • Low maintenance – SF scroll compressors stand for simplicity and reliability. The scroll design has a minimal number of moving parts, ensuring a long operating life with a minimum number of service interventions.
  • Advanced control and monitoring – Whereas the SF range includes a standard pneumatic controller, the SF+ range boasts the high-end Elektronikon® controller. To maximize efficiency and reliability on the SF+ compressors, 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.

Technical data:

  • Capacity FAD (l/s): 1.9 – 40.8 l/s
  • Capacity FAD (l/s, m³/min) – 0.11 – 2.45 m³/min
  • Working pressure: 116 – 145 psig
  • Installed motor power: 2 – 30 HP

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