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Orbital Series™ scroll compressors from Air Squared provide quiet, smooth, efficient and 100% oil-free operation in a durable and reliable design.

When noise, performance, and reliability matter, Orbital Series scroll compressors offer OEMs an attractive alternative to the traditional piston and vane compressors. By nature of a simple design with fewer moving parts, oil-free scroll technology has established itself as a highly efficient, reliable, and cost-effective alternative.

Orbital Series Advantages

100% Oil-Free
Maintain the purity of your system with oil-free scroll technology
Quiet, Smooth Operation
Dynamically balanced, valve-less, and nearly pulsation-free
Efficient Performance
Continuous compression, with no re-expansion or throttling losses
Reliable, Durable Solution
Long product life and simple field maintenance
Cost Competitive
Low-cost compressor configurations for OEMs

Orbital Series Applications

  • PEM Fuel Cells
  • Aviation Oxygen Concentrator
  • Pond Aeration
  • Water Purification System
  • Potable Water System
  • Noninvasive Medical Cooling
  • Percussive Lung Therapy
  • Nitrogen Generator
  • Aerospace Pneumatics
  • Industrial Pneumatics
  • Air Purification

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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 Orbital Series Scroll Compressors

Orbital Series™ scroll compressors offer OEMs a quiet, efficient, durable, and 100% oil-free alternative to traditional piston and vane compressors. Learn more about the technology behind Orbital Series designs from Air Squared and how it can support your application.

Orbtial 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.

Orbital Series Scroll Compressor Advantages

  • Orbital Series scroll compressors are 100% oil-free.
  • Orbital Series scroll compressors are considerably more quiet and smooth-running than competing technology, such as reciprocating and vane. 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, Orbital Series scroll compressors offer a vast improvement over traditional technology, with quiet, smooth, pulsation-free operation.
  • Orbital 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.
  • Orbital Series scroll compressors offer a durable and robust solution, with 70% fewer moving parts than reciprocating technology and only two primary moving parts.

Orbital Series Scroll Compressor News

NASA Outreach Program Assists Air Squared

March 26, 2012

New compressor design heads to production thanks to assistance from NASA outreach program.

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Plug Power Places Large Production Order

October 27, 2011

Plug Power places large production order for Air Squared compressors used in GenDrive fuel cell units.

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P14H22N3.58 Scroll Compressor

100 lpm, 100 psi Scroll Compressor

September 04, 2011

Developed for use in testing pilot suits, the compressor will be ideal for dental applications.

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Orbital Series Scroll Compressor Projects

P19H038A-BLDC-SH Semi-Hermetic Scroll Compressor

Semi-Hermetic Scroll Compressor for CO2 Collection

March 08, 2018

The semi-hermetic P19H038A-BLDC-SH is adopted from a non-sealed scroll compressor of similar design that is used onboard commercial airliners. The unit was modified to compress CO2 with minimal leakage and contamination of the working fluid and is part of an SBIR Phase I project awarded to Air Squared to develop scroll solutions that support ISRU […]

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P34H080A-BLDC Scroll Compressor

High-Capacity Scroll Compressor for Fuel Cell Applications

November 09, 2016

Growing in unison with the international alternative energy industry, Air Squared has become the transportation fuel cell standard through the development of their largest production scroll compressor, the P34H080A-BLDC. Capable of delivering up to 1,850 lpmv, the P34H080A-BLDC provides reliable oil-free air for transportation fuel cell stacks. Design Specifications Discharge Pressure: 1.8 barg Max Volume […]

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Lightweight, Compact, Oil-free Scroll Compressor

February 07, 2013

Developed for mobile applications, the oil-free P24H056A-BLDC features a compact and lightweight design, capable of delivering up to 600 lpmv of air at 0.7 barg. The unit is ideal for mobile fuel cell and medical applications. The efficient compressor employs a traditional orbiting scroll design, but can operate at speeds over 4,000 RPM. While most […]

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P19H38N5.25 5 HP Scroll Compressor

March 01, 2010

As the largest Air Squared scroll compressor to date, the 5 hp P19H38N5.25 is capable of 500 lpm at 125 psig. The AC powered unit features innovative integrated cooling.

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P19H038A-BLDC Scroll Compressor

Durable and Compact Scroll Compressor for Commercial Aerospace

March 08, 2009

Unique among scroll technology solutions for Air Squared, the P19H038A-BLDC is purpose-built to deliver maximum performance per kilogram in a minimal footprint, with the unique needs of aerospace applications considered throughout the entire design process. Intended for integration in a potable water supply system, the P19H038A-BLDC represents the state-of-the-art compressor solution for commercial aerospace applications. […]

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Orbital Series Scroll Compressor Related Articles

Orbital 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.

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

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

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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