Silent Series Badge

Patented Silent Series™ scroll compressors from Air Squared provide unmatched sound levels, industry-leading flow stability, and 100% oil-free operation in a compact design.

When noise, performance, size, and weight matter, Silent Series scroll compressors offer OEMs an attractive alternative to the traditional diaphragm and piston compressors. By introducing a proprietary coating to the fixed scroll and orbiting scroll, Silent Series scroll compressors set a new benchmark for quiet, smooth, and 100% oil-free operation.

Silent Series Advantages

100% Oil-Free
Maintain the purity of your system with oil-free scroll technology
Significantly lower dB than competing piston and diaphragm technology
Smooth Operation
Dynamically balanced, valve-less, and near pulsation-free
Compact, Lightweight Design
Ideal for portable applications where size and weight matter
Cost Competitive
Low-cost compressor configurations for OEMs
Efficient Performance
Continuous compression process with no re-expansion or throttling losses

Silent Series Applications

  • Oxygen Concentrator
  • Nebulizer
  • Patient Simulation Manikin
  • Pressure Ulcer Mattress
  • Dialysis Machine
  • Respirator (Ventilator)
  • Circulation Therapy
  • Wound Aeration
  • Artificial Heart Driver
  • Body Fluid Analysis
  • Nitrogen Generator
  • Air Bearings
  • Air Sampling and Monitoring

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Sales Inquires

Qualified OEMs should consult Air Squared for custom configurations and application specific requirements.

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Learn More About Silent Series Scroll Compressors

Silent Series™ scroll compressors offer OEMs the quietest oil-free compressor solution available. Learn more about the technology behind Silent Series designs from Air Squared and how it can support your application.

Silent Series Scroll Compressor Technology Overview

The namesake of traditional scroll-type designs are the two primary components, an orbiting scroll, and a fixed scroll. The orbiting scroll is coupled to a crankshaft that orbits the scroll eccentrically, following a fixed path with respect to the mating (fixed) scroll, creating a series of crescent-shaped pockets between the two scrolls. In the case of a scroll compressor, the working fluid moves from the periphery (inlet) towards the center (discharge) through increasingly smaller pockets, generating compression.

The operating principles of oil-free scroll compressors are similar to those of lubricated scroll compressors commonly used throughout the refrigeration industry. The primary difference is oil-free scroll compressors use three idler shafts to maintain a close running clearance between the fixed and orbiting scroll instead of an Oldham ring.

Oil-free scroll compressors operate without lubrication, so tight machining tolerances are required to mitigate leakage. Using a proprietary scroll coating, Silent Series scroll compressors from Air Squared further reduce the running clearance between the fixed scroll and orbiting scroll, allowing small-scale oil-free scroll designs to operate at volumetric efficiencies previously unachievable.

Silent Series Scroll Compressor Advantages

  • Silent Series scroll compressors are 100% oil-free.
  • Silent Series scroll compressors are considerably more quiet and smooth-running than competing technology, such as reciprocating. The geometry of the scroll delivers continuous flow and eliminates the need for valves, resulting in significantly less port pulsation and associated noise. The unique orbital motion is dynamically balanced, minimizing vibration and reducing rubbing velocity far below piston rings or vanes. Combined with the absence of several moving parts, Silent Series scroll compressors offer a vast improvement over traditional technology, with quiet, smooth, pulsation-free operation.
  • Silent Series scroll compressors eliminate re-expansion losses – a problem found in reciprocating machines with every piston stroke – improving volumetric efficiency. Additionally, throttling losses are nonexistent with the valveless design.
  • Silent Series scroll compressors offer a durable and robust solution, with 70% fewer moving parts than reciprocating technology and only two primary moving parts.

Silent Series Scroll Compressors News

Air Squared featured in Machine Design magazine

Air Squared in Machine Design

September 19, 2011

Machine Design has recently featured an article introducing Air Squared’s P6H8N3.0 miniature scroll compressor.

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P6H8N3.0 Miniature Scroll Compressor

Miniature Compressor Development Complete

February 12, 2011

Air Squared has finished development on the first scroll-type, continuous-duty, high-efficiency miniature compressor.

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InoGen One

Air Squared Helps Inogen Oxygen Concentrator

March 04, 2005

Rotary scroll compressor helps new Inogen One oxygen concentrator break sound, weight, and battery-life barriers.

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P12H20N2.5 Scroll Compressor and Vacuum Pump

Tapping Scroll Technology for Pulse-free Air

January 01, 2002

New oil-free 0.5 hp compressor and vacuum pump taps clean, reliable scroll technology for pulse-free air in medical devices.

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Silent Series Scroll Compressor Projects

P09H017A-BLDC Silent Series Scroll Compressor

Versatile, Compact, Silent Series™ Scroll Compressor

October 17, 2019

Developed as a replacement for the P12H020A-BLDC-C scroll compressor, the P09H012A-BLDC delivers improved performance, life, and reliability for applications that require a quiet, smooth, oil-free compressor or vacuum pump. The P09H017A-BLDC nearly doubles the performance capability of Air Squared’s Silent Series™ product line and can deliver 45 lpmv at 3.25 barg. The P09H017A-BLDC incorporates a […]

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P05H012A-BLDC-C Miniature Scroll Compressor

Extremely Quiet Miniature Compressor for Medical Applications

March 30, 2018

The low-cost natural gas compressor development funded by Advanced Research Projects Agency – Energy (ARPA-E) is already paying dividends for future standard scroll compressor offerings. With successful development of the P05H012A-BLDC-C, the unit is likely to be the first production-ready model utilizing design and manufacturing technology learned from the government-funded cost reduction campaign. The compressor […]

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P07H015A-BLDC-C Medical Compressor

Compact Oil-Free Scroll Compressor for Medical Devices

March 02, 2017

In 2001, Air Squared released the P11H012A-BLDC-C scroll compressor for use in portable medical oxygen concentrators. The small-scale pump quickly became a flagship product for Air Squared, being integrated into additional medical applications across the globe. After more than fifteen years in service, the P11H012A-BLDC-C will be replaced by the P07H015A-BLDC-C scroll compressor. The P07H015A-BLDC-C […]

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Miniature Medical Scroll Compressor

September 01, 2013

For use in a portable nebulizer application, the compact P08H014A-BLDC is the first oil-free scroll compressor to incorporate a supporting piston to load the orbiting scroll against the fixed scroll. Designed for a small footprint and silent operation, the patented innovation will help reduce cost in volume production. Weighing just 375 grams with brushless motor, […]

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Miniature Scroll Compressor

Miniature Scroll Compressor for Circuit Cooling

April 12, 2009

Designed for Intel for use in circuit cooling, the miniature scroll compressor is the first to incorporate a loaded piston behind the orbiting scroll and patented delayed porting. The orbiting scroll design eliminates the need for dynamic seals and extends duty life. At just 2 inches in diameter and 2.75 inches long, the mini compressor […]

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Silent Series Scroll Compressor Related Articles

Silent Series Scroll Compressor FAQs

Monitoring speed is an important aspect of operating a scroll compressor or vacuum pump, as operation over the specified maximum speed can result in premature or catastrophic failure.

For scroll compressors and vacuum pumps that have a brushless DC motor, speed can be measured by connecting a digital tachometer between a hall sensor and ground. The tachometer must be programmed to the correct number of pulses per revolution, which can be determined by dividing the numbers of motor poles by 2. For example, an 8-pole motor will have 4 pulses per revolution.

Alternatively, an oscilloscope can also be used to measure the frequency of the hall sensors. Divide the measured frequency by the number of pulses per revolution and multiply by 60 to determine the RPM.

For scroll compressors and vacuum pumps that have an AC motor, speed can be measured by multiplying the frequency of the variable frequency drive (VFD) by 60 to determine the RPM.

Air Squared does not provide operation manuals for most products.

Given the specialized nature of our scroll products, Air Squared works directly with OEM customers to install, operate, test, evaluate, and service products. Customers who require an operation manual should contact their Sales Representative.

If you do not have a Sales Representative, start with our Application Assistant or contact Sales directly.

Application Assistant

Looking at the face of the unit, the motor shaft for scroll compressors and scroll vacuum pumps rotates clockwise.

Most Air Squared products do not have a CE conformity marking.

Our products are primarily designed for OEMs and not intended for end users. As most OEM systems already require CE marking, conformity specific to an Air Squared product is generally not required.

OEM customers that require conformity specific to an Air Squared product should contact their Sales Representative.

Most scroll compressors have a discharge port centered on the face of the unit, with the inlet port positioned near the periphery.

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