Iso 8573-1 Class

[Kim Veller]

Webring peace of mind to food & beverages customers. Our ISO 22000 certification for our oil-free production facility in Antwerp, Belgium, and the food safety management system applies to all our Z type class 0 oil-free air compressors and matching dryers and filters. Our Z compressors are made in a clean, safe environment and we have a documented transparent Food Safety Management System in place. Further support is provided by our ISO 22000 experts, who guide you in your process and assist you in any future updates.

The summary chart (Figure 1) below shows purity classes 0 through X for particles, water, and oil. The end user can then select a purity class for each contaminant based on either equipment installed or air quality required for a specific process or product. There should be no confusion on what contaminants and limits need to be tested, because that decision was made when compressor system filtration and point-of-use filters were selected.

With a focus on Demand-Side Optimization, compressed air dryers, filters, condensate management, tanks, piping and pneumatic technologies are profiled. How to ensure system reliability, while reducing pressure drop and demand, is explored through System Assessment case studies.

The International Standards Organization (ISO) created ISO 8573-1 to measure compressed air quality by the amount of solid particulates, water, and oil content in one cubic foot of compressed air. This standard outlines the levels of solid particulates, water, and oil allowed based on the classification.

Oil-free air compressors provide manufacturers with peace of mind by avoiding contamination risks from trace oil reaching their product and protecting their corporate reputation. This peace of mind continues further downstream by preventing oil contamination in pneumatic equipment lines leading to higher maintenance and downtime.

Oil-flooded air compressors generate oil-contaminated condensate that is often regulated by governing authorities for disposal. This hidden cost of monitoring, testing, and disposing of condensate is eliminated with the use of oil-free air.

The more energy efficient the compressor, the more direct impact the machine will have on lowering operating expenses. Oil-free compressors are typically 10-15% more efficient than equivalent capacity oil-flooded rotary machines. Subsequently, since energy costs are generally 60-75% of the total life-cycle costs of an air compressor, overall cost savings from efficiency alone can result in several thousands of dollars in life-cycle savings.

Oil-flooded machines also require several oil filters and oil separators in the air path to clean the manufactured compressed air. Each one of these items will cause a pressure drop across the filter, resulting in lower air pressure delivery downstream in the plant. The decrease in pressure means the compressor must work harder to maintain the demand needed for the plant creating lower efficiencies and higher energy costs.

Understanding the long-term benefits an oil-free air compressor brings to manufacturing, FS-Elliott is committed to only designing air compressors that deliver 100% guaranteed oil-free, ISO 8573-1 Class 0 air.

Through UnitedHealthcare, UMR and HealthSCOPE Benefits creates and publishes the Machine-Readable Files on behalf of FS-Elliott Co., LLC. To link to the Machine-Readable Files, please click on the URL provided: transparency-in-coverage.uhc.com

Compressed air is used in almost all industries for a wide range of applications. Whether as control air for coordinating systems, as conveying air for transporting bulk goods or as process air for filling packaging.

In addition to cross-industry topics such as measuring the volume flow or leakages, each industry has its own specialist applications and requirements in terms of quality, efficiency and process reliability.

Modern production technology needs compressed air. Depending on the application, the requirements range from dry and oil-free to absolutely sterile. We offer the right treatment technology for every compressed air quality.

The DIN ISO 8573 series of standards deals with compressed air quality in nine parts. Parts two to nine include test methods. Part 8573-1 classifies compressed air by a maximum content of impurities (particles, water and oil) that may be contained. The DIN ISO 8573-1 standard defines the quality classes of compressed air with regard to:

Filling tires, for example, requires quality class 2 for both particle and oil concentration, whereas spray gun and laser cutting requires class 1 particle and oil content. While Class 4 humidity is sufficient for general applications with factory or service air, more complex process engineering processes require Class 2 to Class 1 humidity.

Compressed air is an important source of energy in almost all industries. The required quality varies from industry to industry and from application to application. However, the desire for optimal production processes, safe systems and cost-efficient operation remains the same. We fulfill these requirements on the way from the compressed air generator to the application with safe, reliable and globally proven treatment technology. And thus ensure your success!

Companies face great challenges in production: if product and process safety depend on the quality of the compressed air, the treatment at the highest level must be ensured at all times. You can only win the trust of consumers if you take responsibility and unconditionally rely on quality assurance. At the same time, the profitability of the processes determines the future viability of the company. An intelligent energy management has the highest priority: In compressed air generation, energy costs often amount to more than three quarters of the total costs, the savings potential in this area is considerable. BEKO TECHNOLOGIES measurement technology helps to identify these potentials.

In many respects, standards are the foundations that underpin all industrial operations. They create a level playing field that ensures fair competition, while reducing risk and enhancing safety, efficiency and innovation. They also provide the frameworks that help manufacturers develop reliable production processes, with accepted parameters against which performance, reliability and quality can be measured.

For industrial users of compressed air, one of the key standards is ISO 8573. This defines the nature and permissible concentration of contaminants in a compressed air stream. Note that ISO 8573 does not include breathing or medical air; these are covered in separate BS EN 12021 standards and various HTM (Health Technical Memoranda) guidelines.

ISO 8573 was originally introduced in 1991 and has subsequently been updated on a number of occasions; the latest version is ISO 8573:2017. As the International Standards Organisation (ISO) tends to reappraise standards every five years, we should be due for a review in 2022.

The current version of the standards consists of nine parts, with the Part 1 relating to the types of contaminants and different levels, or classes, of purity, while the remaining eight parts cover various test methods and instruments. In full, these are:

For each Group, the standard then categorises different Quality Classes, each with a maximum permissible concentration of contaminants. For example, for Group B, there are 9 Quality Classes, ranging from Class 1, which is the most stringent, to Class 9, the most basic, while for Group A there are seven Classes and for Group C five Classes. These are shown below:

It is normal for equipment to be specified in line with these categories. For example, a compressed air filter might offer performance to ISO 8573:2010 Class 1-2-2; i.e. it conforms to Class 1 for particulate filtration, Class 2 for moisture removal and Class 2 for oil filtration.

Note that in each Group there is a Class 0. This is normally based on an agreed specification between the user and equipment supplier and is set at a level that is suitable for the application and that can be validated using the relevant test criteria stipulated in ISO 8573 Parts 2 to 9.

Note also that Group A does not include microorganisms, although testing for the presence of these contaminants is defined under Part 7 of the ISO 8573 standard. In applications such as food and beverage, where microbiological contamination needs to be controlled, the normal approach is to define safe criteria based on the demands of the application itself. This can then be controlled by using precise dew-point measurement and air drying, to the level where the growth of microorganisms is inhibited, followed by specialised sterile point-of-use filtration.

A final, but equally important point, is that the standard can help to minimise energy costs. By having a clear understanding of the exact requirement for the maximum acceptable levels of contamination, especially moisture, it is possible to optimise the performance of systems components such as dryers without affecting air or final product quality.

ISO 8573-1:2010 provides general information about contaminants in compressed-air systems as well as links to the other parts of ISO 8573, either for the measurement of compressed air purity or the specification of compressed-air purity requirements.

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ISO 8573 is an international standard in the United States, United Kingdom, Germany and India that defines contaminants found within compressed air. It is known as the guideline to understand air purity levels within a compressed air system.

The standard is divided into nine different parts. 8573-1 defines air quality classes based upon specific contaminant types to allow users to determine the appropriate purity levels for any given application. 8573-2 through 9 outline methods to test and quantify an air sample to determine which purity class it falls into. ISO 8573-1 is the most frequently used aspect of ISO 8573, and we will explain it in more depth throughout this blog.

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