Standards

CAGI Releases Compressed Air Purity Guide

By Chad Larrabee, Technical Editor, Compressed Air and Gas Institute

The Compressed Air and Gas Institute has released a Compressed Air Purity Guide to help industries achieve clean, dry compressed air and improve system reliability. The guide applies ISO 8573-1 to classify contaminants such as particles, water and oil, and defines purity levels for plant, instrument and process air. It also outlines key technologies like dryers and filtration systems to ensure optimal air quality and equipment protection.

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MSHA Regulations for Safe Compressed Air Operation

By Paul Edwards, President, Compressed Air Consultants

This article reviews key Mine Safety and Health Administration (MSHA) requirements affecting compressors, air receivers, pressure systems, piping, hoses and compressed air use. It also examines common field hazards, inspection and maintenance considerations, equipment safety requirements and worker training provisions. Practical examples illustrate how mine operators and compressed air professionals can identify potential hazards and improve safety while working within the applicable MSHA framework.
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Understanding the ISA-7.0.01-1996 Instrument Air Standard

By Joe D’Orazio, National Sales Manager, Kaeser Compressors

This article examines the ISA-7.0.01-1996 instrument air standard and its requirements for pressure dew point, particle size, oil content and contaminants. It explains how to select and size refrigerated and desiccant compressed air dryers, filtration systems and air compressors based on operating conditions and application requirements. The article also addresses dew point optimization, compressed air demand, system redundancy, maintenance and leak management, with practical examples from food packaging, oil refining and remote industrial applications.
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Safe Compressed Air Drying Systems for Class I, Division 1 Environments

By Jess Elley, Product Marketing Manager, Suburban Manufacturing Group – Tsunami Compressed Air Solutions

Learn how engineers can safely remove moisture from compressed air systems in hazardous environments by eliminating ignition risks through pneumatic controls. This article explores design considerations, performance characteristics and reliability factors for regenerative desiccant dryers operating in Class I, Division 1 locations.
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CAGI Releases Compressed Air Purity Guide

By Chad Larrabee, Technical Editor, Compressed Air and Gas Institute

The Compressed Air and Gas Institute has released a Compressed Air Purity Guide to help industries achieve clean, dry compressed air and improve system reliability. The guide applies ISO 8573-1 to classify contaminants such as particles, water and oil, and defines purity levels for plant, instrument and process air. It also outlines key technologies like dryers and filtration systems to ensure optimal air quality and equipment protection.
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Compressed Air and Vacuum System Purity for Food Packaging

By John Schmitt, Marketing Product Manager; Weston Benton, Product Channel Manager – Vacuum & Low Pressure, and Rob Grizzle, Midwest Sales Manager, Kaishan USA

This article examines strategies for achieving high-purity compressed air and vacuum systems in food processing and packaging facilities, emphasizing ISO 8573.1 quality classes, moisture control, particulate filtration, and food-grade lubricants. It also details best practices for system layout, centralized vacuum implementation, pressure dew point management, and preventive maintenance to reduce contamination risk, maintain equipment reliability, and ensure food safety compliance.
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Trust Through Testing: Inside the CAGI Performance Verification Program

By Jayme Leonard, Digital Marketing Specialist, Atlas Copco Compressors 

To further support transparency and confidence in compressed air system equipment performance, CAGI established the Performance Verification Program. This third-party testing initiative verifies that participating manufacturers’ published performance data, such as energy consumption, flow rate and efficiency, are accurate and consistent with industry standards.
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Pressure Dew Point Monitoring: The Key to ISO 8573-1 Compliance

By Simon Gleissner, Managing Director, SUTO iTEC

The ISO 8573-1 standard defines clear limits for various compressed air quality parameters. This helps users classify their systems consistently, compare results across applications and set the right requirements for specific processes. This article explains the key points of the ISO 8573 standard and guides you through the correct way to measure and classify pressure dew point for compliance.
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Meeting ISO 8573-1 Compressed Air Quality Specifications

By Ron Marshall, Chief Auditor, Marshall Compressed Air Consulting

The ISO 8573-1 was developed to provide standardized classes for compressed air purity in terms of particles, water and oil to drive the planning and design of compressed air systems in order to deliver the quality desired or required. This article explores why testing compressed air quality is as essential as choosing the right filtration, discusses real-world experiences, illustrates the risks of assuming things are right and explains the value of compressed air measurement.
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The Case For Low Horsepower, Two-Stage Rotary Screw Air Compressors

By Ed Maxwell, CEO, Eastern States Associates

The isentropic efficiency of single-stage rotary screw air compressors, as reported by CAGI data, typically falls between 65% and 75%. Since isentropic efficiency is the ratio of ideal work to actual work, this range suggests these air compressors consume roughly 33% to 54% more power than the theoretical minimum for the given air pressure output. Much of the discussion in this article is theoretical since low-horsepower two-stage air compressors are new to the U.S. market.
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The Role of Electric Motors and Drives in Industrial Decarbonization

By Bevan Christiansen, Global Segment Manager, ABB

Decarbonizing industry is a complex global challenge that requires innovation, collaboration and technological advancements. No single solution will transform industries, but a combination of strategies – including the adoption of energy-efficient motors and drives – will reduce industrial emissions and energy consumption.
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New ABB Super Premium Motors Bring Energy Efficiency Gains

By Troy Dreier, Senior Editor, Compressed Air Best Practices® Magazine

SP4 motors provide the high efficiency and reliability required for air compressors which operate under demanding and variable-load conditions. The reduced energy losses and cooler operating temperatures mean a lower total cost of ownership for manufacturers. Additionally, the NEMA Super Premium efficiency level ensures compliance with stringent energy regulations, making this a future-proof investment.
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Compressed Air Scoping Tool Teaches Energy Efficiency Best Practices

By Alex Botts, R&D Associate, Oak Ridge National Laboratory

Oak Ridge National Laboratory and the Department of Energy’s Better Plants program created the Compressed Air Scoping Tool with the most up-to-date best practices in the industry. It can be used as a nonbiased, one-stop shop for best practice recommendations. The Excel-based tool is designed to be an initial step in understanding the operation of a compressed air system, a baselining tool enabling users to comprehend various aspects of a facility’s system from the production of compressed air to its application by end users.
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New DOE Air Compressor Regulations

By Bruce McFee, President, Sullivan-Palatek

The U.S. Department of Energy has initiated the efficiency regulation of oil-flooded rotary air compressors. This has the potential to cause a big change for the air compressor industry, as models from 35-1,250 cfm with pressures ranging from 75-200 psi (5.2-13.8 bar) will need to meet a minimum isentropic efficiency.
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ASHRAE 90.1 Brings New Requirements to Compressed Air System Design

By Troy Dreier, Compressed Air Best Practices® Magazine

Word is beginning to filter out about the 2022 changes to the ASHRAE 90.1 energy efficiency standard, and the changes it promises to bring to how compressed air systems are specified, commissioned and maintained. More specifically, the industry is learning about section 10.4.6 of 90.1, which is the first time the standard has included a section on compressed air.
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Why CAGI Personnel Certification Matters

By CAGI System Assessment Section

CAGI sponsors and oversees a performance verification program for some types of equipment. In this program, which is expanding to include additional types of products, a third-party verifies performance data that is stated by manufacturers. Participants in these programs are able to use a standardized CAGI datasheet to state performance. The datasheets and verification process provide customers with assurance that they are getting what they pay for in terms of performance.
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Defining the Purity of Facility Generated Nitrogen Gas

By the Compressed Air & Gas Institute

While oxygen is unquestionably the most important gas in our atmosphere, as it is essential for most animals and human life, nitrogen is the most widely used atmospheric gas. Nitrogen is the go-to gas for countless industrial, medical, and scientific applications. This is because nitrogen is in vast supply, inert, and possesses the desirable characteristics of being colorless, odorless, and tasteless. The purity of nitrogen significantly affects the outcome of the application for which it is used and how the industry measures the purity of nitrogen gas is the focus of this article.
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Food Safety Design Tips for Pneumatic Systems

By Steve Bain, Industry Segment Manager Food & Beverage, Festo US

Current Good Manufacturing Practices (cGMPs) under FSMA CFR Title 21 117.40 is the cornerstone of this food safety effort. Title 21 details the cleanability and cross contamination standards that plants must meet so that food is deemed safe. The following are tips for updating existing pneumatic systems in food and packaging and what to look for when purchasing new systems.
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Isentropic Efficiency of Rotary Screw Air Compressors

By Brian Parks, Fourth Utility Consulting

Many astute air compressor users have noticed the Compressed Air and Gas Institute (CAGI) air compressor data sheets, dated after June 2020, have a new term listed; isentropic efficiency. Isentropic Efficiency will be the new standard of reference for a true comparison of the overall efficiency of air compressors at any rated discharge pressure. Now users can see which company produces the most efficient product with an easy reference percentage number. The compressed air industry, in conjunction with CAGI, has been trying to make fair comparisons between air compressors for years.
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Achieving “Technically Oil-Free” Compressed Air

By David Swartz, Gulf Coast Regional Sales Manager, Sauer Compressors USA

In this article we will discuss how to achieve actual oil-free air from your air compressor, no matter what type of air compressor it is. Air compressors of all designs turn mechanical power into pneumatic power by successively concentrating air across compression stages. A rotary screw air compressor, for example, utilizes rotating helical screws to drive air forward, increasing its pressure by reducing the volume of space the air mass takes up. Mechanical compression of this nature takes quite the force and energy to accomplish, which equates to heat generation and physical wear inside of the compressor.
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Microbiological Testing Considerations for Compressed and High Risk Ambient Air Systems in Food Plants

By Rochester Midland Corporation

Micro-aerosolized droplets are how many members of the microbial world become cross-contaminants via the air mode of transmission. Food borne viral pathogen Hepatitis A and the ubiquitous Norwalk are very often transported via micro- aerosols. It is well known that many viral or bacterial pathogens or spoilers are transmitted via respiratory bursts [coughs/ sneezes] from people or air handling system, condensate, and splash back from floors. Strict cGMPs can limit and control transmission in terms of personal & environmental hygiene.
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ISO 50001: How Manufacturers Can Achieve a Low-cost and Low-carbon Future

By Graham Coats, Energair

For an organization to prove that it meets the standard it has to undergo a management system audit, either internal or external. The question, therefore, is how can those utilizing compressed air effectively evaluate their assets’ performance as part of an ISO 50001 energy management system and, in doing so, grow their bottom line and minimize their negative environmental footprint.
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Keep Contaminants Out of Food and Beverage Processing Air Supplies

By Brandon Brownlee, Motion Industries

According to the United States Department of Agriculture, more than 30,000 food and beverage processing plants across the United States employ more than 1.5 million workers.1 Each of those plants applies a wide range of processes to raw agricultural goods to produce consumable food and beverage products.
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Verifying Compressed Air and Gas Safety and Quality in Medical Applications

By Trace Analytics

Compressed air and gases are vital to numerous healthcare facility operations. Commonly used for breathing, sedation, and the operation of medical instruments, healthcare facilities must rely on these utilities for lifesaving and therapeutic benefits. The quality of the air and gas produced by the facility’s compressed air systems is paramount to their efficacy in promoting positive outcomes for patients.
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How to Implement Aseptic Technique in Microbiological Compressed Air Testing

By Trace Analytics

In modern and industrial work settings, people spend more than 90% of their time in enclosed spaces, such as warehouses, office buildings and factories. In most indoor environments, the air contains a variety of chemical and microbial particles, commonly defined as indoor pollutants, which can severely affect human health and product quality (1). Industries like food and beverage, medical devices and pharmaceutical manufacturers rely on their scheduled compliance testing to confirm the presence or absence of issues in workflow pipelines that are detrimental to the daily output and safety of the product.
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