Industrial Utility Efficiency

ISO and CAGI

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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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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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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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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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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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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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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Compressed Air and Energy Management Systems Based on ISO 50001: What You Need to Know

By Bo Kuraa, Enersize

An Energy Management System (EnMS) according to ISO 50001:2018 provides companies with a strategic tool to help manage the performance of energy-consuming equipment, including compressed air systems. Improved performance of a compressed air system, in turn, can go a long way toward lowering energy costs and improving system uptime, both of which provide the ability to reduce the company’s carbon footprint. Here’s a look at the standard and important considerations involved in the implementation of an EnMS for a compressed air system according to ISO 50001.

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Microbial Testing and Compressed Air Standard ISO 8573-7

By Maria Sandoval, Microbiologist, Trace Analytics

This article will focus on ISO8573-7 normative test methods and analysis for viable microbiological contaminants and how it can be fundamentally utilized in compressed air microbial monitoring plans. The quality of the compressed air must be monitored periodically to fulfill national and international standards. ISO 8573 is an available standard addressing compressed air quality. It consists of nine parts that address purity classes, specifications, and procedures. ISO 8573-7:2003, can be utilized across all industries’ compressed air microbial monitoring plans. It contains both informative and normative procedures but lacks any tested compressed air microbial specifications regarding colony enumeration limits for microbial plate counts.

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Innovative Adsorption Medium for Pressure Swing Desiccant Air Dryers

By Colin Billiet, CEO, Air Purification Skroll

Compressed air contains contaminants such as dirt, water and oil which must be removed before use. ISO8573.1 specifies air quality classes for these contaminants. Humidity is expressed in terms of Pressure Dew Point (PDP). PDP is the temperature at which air is fully saturated with moisture, when the air temperature falls below this point further condensation will occur.

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Motor Controls in Centrifugal Air Compressors

By The Compressed Air and Gas Institute

The days are long gone when power to a motor was controlled with a knife switch. These were cumbersome and downright dangerous to man and equipment alike. Every electric motor has some form of controller, responsible for turning over (starting) the motor or motor-controlled equipment. These controllers offer differing features and complexity depending on the application, United States electrical codes require the use of a motor starter that meets NEMA’s National Electrical Code as well as all local electrical codes.

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Refrigerated Dryers Tested by the CAGI Performance Verification Program

By Rick Stasyshan for the Compressed Air and Gas Institute

Compressed Air Best Practices® (CABP) Magazine and the Compressed Air and Gas Institute (CAGI) cooperate to provide readers with educational materials, updates on standards and information on other CAGI initiatives. CABP recently caught up with Rick Stasyshan, Technical Director for the Compressed Air and Gas Institute (CAGI) to provide readers with some insights into the benefits of CAGI’s Verified Performance Program for refrigerated compressed air dryers.

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Key Considerations for Installing Centrifugal Air Compressors

By the Compressed Air and Gas Institute

Compressed Air Best Practices® Magazine and the Compressed Air and Gas Institute have been cooperating on educating readers on the design, features, and benefits of centrifugal compressor systems. As part of this series, Compressed Air Best Practices® (CABP) Magazine recently caught up with the Compressed Air and Gas Institute (CAGI). During our discussion, we reviewed some of the things readers should consider when installing a centrifugal compressor system.

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ISO 22000 Certification for the Food & Beverage Industry

By Atlas Copco Compressors

ISO 22000 is a food and beverage (F&B) specific derivative of ISO 9001, a family of standards from the International Organization for Standardization that details the requirements of a quality management system. It is a quality certification that can be applied to any organization in the food chain — from packaging machine manufacturers to the actual food processing facilities.

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Using ISO 8573-1 to Test Compressed Air: Clearing the Confusion

By Ruby Ochoa, President, Trace Analytics, LLC

Compressed air is used in more than 70 percent of all manufacturing activities, ranging from highly critical applications that may impact product quality to general “shop” uses. When compressed air is used in the production of pharmaceuticals, food, beverages, medical devices, and other products, there seems to be confusion on what testing needs to be performed.

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Understanding Centrifugal Air Compressor Capacity Controls

By the Compressed Air and Gas Institute

Centrifugal compressors are dynamic, and each has a characteristic curve of rising pressure as capacity decreases. Without any control system, the compressor would operate along this natural curve. A centrifugal compressor's flow and pressure are typically controlled by a combination of an inlet control device and an unloading valve (UV).

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Variable Inlet Guide Vanes Boost Centrifugal Air Compressor Efficiency

By the Compressed Air and Gas Institute

Compressed Air Best Practices® (CABP) Magazine recently caught up with the Compressed Air and Gas Institute (CAGI) to discuss variable inlet guide vanes (IGV). The following interview describes how centrifugal compressor efficiency can be improved thanks to recent developments in IGV technology.

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How Inlet Conditions Impact Centrifugal Air Compressor Performance

By Rick Stasyshan, CAGI Technical Consultant, and Neil Breedlove, Atlas Copco

Compressed Air Best Practices® (CABP) Magazine recently spoke with Rick Stasyshan, Compressed Air and Gas Institute’s (CAGI) Technical Consultant, and Mr. Neil Breedlove of CAGI's Centrifugal Compressor Section and member company, Atlas Copco Compressors, about centrifugal air compressors. Specifically, the discussion outlined how various inlet conditions can impact the performance of centrifugal air compressors.

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Energy Performance Indicators Support ISO 50001 and ISO 50006

By Ron Marshall for the Compressed Air Challenge®

Organizations across the world are gaining control of their energy spending by measuring and managing their utilities. In doing so, they may be using standards such as ISO 50001:2011 (energy management systems — requirements with guidance for use) to help set up an energy management system (EnMS) that will improve their energy performance. This improved performance might lower energy bills, making products more affordable in the marketplace and improving an organization’s carbon footprint.

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A Compressed Air & Gas Institute Session - Heat Recovery from Industrial Compressed Air Systems

By Compressed Air Best Practices® Magazine

The rise in energy prices is an unwelcome reality in today’s manufacturing and business environment. And while the rate of price increases for natural gas, heating oil and electricity may vary from year to year, the upward trajectory is clear. Energy cost reduction strategies are vital to staying competitive. Compressed Air Best Practices® Magazine recently discussed heat recovery, from industrial compressed air systems, with the Compressed Air and Gas Institute (CAGI). Their inputs should provide you with some insight in energy-saving technology.

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