{"id":95328,"date":"2026-11-11T08:33:35","date_gmt":"2026-11-11T07:33:35","guid":{"rendered":"https:\/\/www.eputec.de\/compressed-air-treatment-what-you-need-to-know\/"},"modified":"2026-11-11T08:33:35","modified_gmt":"2026-11-11T07:33:35","slug":"compressed-air-treatment-what-you-need-to-know","status":"publish","type":"post","link":"https:\/\/www.eputec.de\/en\/compressed-air-treatment-what-you-need-to-know\/","title":{"rendered":"Compressed Air Treatment: What You Need to Know"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-one-full fusion-column-first fusion-column-last\" style=\"--awb-bg-size:cover;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-column-wrapper-legacy\"><div class=\"fusion-text fusion-text-1\"><p><strong>1. Why does compressed air need to be treated?<\/strong><\/p>\n<p>The quality of compressed air is a key factor in the efficiency and longevity of products in the production process. The problem is: <strong>untreated compressed air is anything but clean.<\/strong><\/p>\n<p>Ambient air contains up to 180 million <strong>dirt particles<\/strong> (0.1 &#8211; 0.01 micron), 5 &#8211; 40 g\/m\u00b3 of <strong>water<\/strong> (water vapour) and up to 0.03 mg of <strong>oil<\/strong> in the form of mineral oil aerosols and unburnt hydrocarbons per cubic metre. All these contaminants are drawn in and end up in the compressor with the ambient air.<\/p>\n<\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_4 1_4 fusion-one-fourth fusion-column-first\" style=\"--awb-bg-size:cover;width:25%;width:calc(25% - ( ( 4% ) * 0.25 ) );margin-right: 4%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-column-wrapper-legacy\"><div class=\"fusion-image-element in-legacy-container\" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><a href=\"https:\/\/www.eputec.de\/wp-content\/uploads\/2020\/07\/KSI-Elementuebersicht.jpg\" class=\"fusion-lightbox\" data-rel=\"iLightbox[9cd3baca8cbc50d0634]\" data-title=\"KSI-element-overview\" title=\"KSI-element-overview\"><img decoding=\"async\" width=\"800\" height=\"786\" alt=\"Compressed air treatment\" src=\"https:\/\/www.eputec.de\/wp-content\/uploads\/2020\/07\/KSI-Elementuebersicht-e1744790737451.jpg\" data-orig-src=\"https:\/\/www.eputec.de\/wp-content\/uploads\/2020\/07\/KSI-Elementuebersicht.jpg\" class=\"lazyload img-responsive wp-image-37442\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27800%27%20height%3D%27786%27%20viewBox%3D%270%200%20800%20786%27%3E%3Crect%20width%3D%27800%27%20height%3D%27786%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.eputec.de\/wp-content\/uploads\/2020\/07\/KSI-Elementuebersicht-200x197.jpg 200w, https:\/\/www.eputec.de\/wp-content\/uploads\/2020\/07\/KSI-Elementuebersicht-400x393.jpg 400w, https:\/\/www.eputec.de\/wp-content\/uploads\/2020\/07\/KSI-Elementuebersicht-600x590.jpg 600w, https:\/\/www.eputec.de\/wp-content\/uploads\/2020\/07\/KSI-Elementuebersicht.jpg 800w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 800px) 100vw, 400px\" \/><\/a><\/span><\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_3_4 3_4 fusion-three-fourth fusion-column-last\" style=\"--awb-bg-size:cover;width:75%;width:calc(75% - ( ( 4% ) * 0.75 ) );\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-column-wrapper-legacy\"><div class=\"fusion-text fusion-text-2\"><p><strong>1.1 What happens during the compression process?<\/strong><\/p>\n<p>When <strong>ambient air is compressed<\/strong>, the concentration of contamination increases massively. When compressing to <strong>10 bar operating pressure<\/strong>, 11 m\u00b3 of expanded ambient air is drawn in and compressed to an operating volume of 1 m\u00b3. This increases the concentration of contaminants elevenfold, to <strong>up to 2 billion particles per cubic metre of compressed air<\/strong>. On top of this come lubricating oil and wear particles.<\/p>\n<p>Depending on the design, limit values of<\/p>\n<ul>\n<li>250 mg\/m\u00b3 particles<\/li>\n<li>85 mg\/m\u00b3 water vapour<\/li>\n<li>15 mg\/m\u00b3 oil<\/li>\n<\/ul>\n<p>are released into the network.<\/p>\n<\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_1_1 1_1 fusion-one-full fusion-column-first fusion-column-last\" style=\"--awb-bg-size:cover;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-column-wrapper-legacy\"><div class=\"fusion-text fusion-text-3\"><p><strong>1.2 What are the consequences of contaminated compressed air?<\/strong><\/p>\n<p><strong>Contaminated compressed air<\/strong> can have negative consequences for the smooth running of production processes, the health of employees, the service life of compressed air tools and air nozzles, and the level of energy and maintenance costs.<\/p>\n<p><strong>Without compressed air treatment<\/strong>, chemically aggressive and harmful particles are not filtered out. Dust and other solid particles cause <strong>faster wear of high-quality compressed air components (<\/strong>air guns, air nozzles, air knives or ring nozzles) through abrasion. Moist compressed air can cause <strong>corrosion<\/strong>, <strong>leaks<\/strong>, <strong>mechanical defects<\/strong> and <strong>frost damage<\/strong>. Finally, oil in compressed air can lead to <strong>contamination<\/strong> of products as well as reduced diameters and <strong>blockages<\/strong>.<\/p>\n<\/div><div class=\"fusion-text fusion-text-4\"><p><strong>1.3 Efficient compressed air treatment<\/strong><\/p>\n<p>The central task of compressed air treatment is therefore to remove contaminants from the compressed air <strong>to suit the needs of each industry and production process<\/strong>, providing technically oil-free, clean compressed air in the required quantity at the right place and at the right time.<\/p>\n<p>The key factors for <strong>assessing compressed air quality<\/strong> are particle size and quantity, residual water content, pressure dew point and residual oil content. Sensitive industries such as food or pharmaceuticals require particularly high compressed air quality.<br \/>\n<strong>Compressed air quality can be classified according to DIN ISO 8573-1<\/strong> into various purity classes:<\/p>\n<\/div><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-text fusion-title-size-two\" style=\"--awb-margin-top-small:0px;--awb-margin-right-small:0px;--awb-margin-bottom-small:20px;--awb-margin-left-small:0px;\"><h2 class=\"fusion-title-heading title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;--fontSize:21.6;--minFontSize:21.6;line-height:1.2;\">Compressed air classes according to ISO 8573-1:2010<\/h2><\/div><div class=\"fusion-text fusion-text-5\"><div class=\"table-1\">\n<table width=\"100%\">\n<tbody>\n<tr>\n<td colspan=\"4\"><strong>Solids\/dust<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>Class<\/strong><\/td>\n<td colspan=\"3\" align=\"center\"><strong>max. number of particles per m\u00b3<\/strong><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td colspan=\"3\" align=\"center\"><strong>with a particle size<\/strong><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td colspan=\"3\" align=\"center\"><strong>of d [<\/strong>\u00b5m<strong>]*<\/strong><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td align=\"center\">0.1 \u2264 d \u2264 0.5<\/td>\n<td align=\"center\">0.5 \u2264 d \u2264 1.0<\/td>\n<td align=\"center\">1.0 \u2264 d \u2264 5.0<\/td>\n<\/tr>\n<tr>\n<td><strong>0<\/strong><\/td>\n<td colspan=\"3\" align=\"center\">strengere Anforderungen als Class 1<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td colspan=\"3\" align=\"center\">(as specified)<\/td>\n<\/tr>\n<tr>\n<td><strong>1<\/strong><\/td>\n<td align=\"center\">\u2264 20,000<\/td>\n<td align=\"center\">\u2264 400<\/td>\n<td align=\"center\">\u2264 10<\/td>\n<\/tr>\n<tr>\n<td><strong>2<\/strong><\/td>\n<td align=\"center\">\u2264 400,000<\/td>\n<td align=\"center\">\u2264 6000<\/td>\n<td align=\"center\">\u2264 100<\/td>\n<\/tr>\n<tr>\n<td><strong>3<\/strong><\/td>\n<td align=\"center\">&#8211;<\/td>\n<td align=\"center\">\u2264 90,000<\/td>\n<td align=\"center\">\u2264 1,000<\/td>\n<\/tr>\n<tr>\n<td><strong>4<\/strong><\/td>\n<td align=\"center\">&#8211;<\/td>\n<td align=\"center\">&#8211;<\/td>\n<td align=\"center\">\u2264 10,000<\/td>\n<\/tr>\n<tr>\n<td><strong>5<\/strong><\/td>\n<td align=\"center\">&#8211;<\/td>\n<td align=\"center\">&#8211;<\/td>\n<td align=\"center\">\u2264 100,000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"margin-left: auto;margin-right: auto;margin-top:20px;width:100%;\"><\/div><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-text fusion-text-6\"><div class=\"table-1\">\n<table width=\"100%\">\n<tbody>\n<tr>\n<td colspan=\"2\"><strong>Water<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>Class<\/strong><\/td>\n<td align=\"center\"><strong>Pressure dew point<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>0<\/strong><\/td>\n<td align=\"center\">strengere Anforderungen als Class 1<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td align=\"center\">(as specified)<\/td>\n<\/tr>\n<tr>\n<td><strong>1<\/strong><\/td>\n<td align=\"center\">\u2264 -70 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td><strong>2<\/strong><\/td>\n<td align=\"center\">\u2264 -40 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td><strong>3<\/strong><\/td>\n<td align=\"center\">\u2264 -20 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td><strong>4<\/strong><\/td>\n<td align=\"center\">\u2264 +3 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td><strong>5<\/strong><\/td>\n<td align=\"center\">\u2264 +7 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td><strong>6<\/strong><\/td>\n<td align=\"center\">\u2264 +10 \u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"margin-left: auto;margin-right: auto;margin-top:20px;width:100%;\"><\/div><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-text fusion-text-7\"><div class=\"table-1\">\n<table width=\"100%\">\n<tbody>\n<tr>\n<td colspan=\"2\"><strong>Oil<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>Class<\/strong><\/td>\n<td align=\"center\"><strong>Total oil concentration<\/strong><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td align=\"center\"><strong>(liquid, aerosol + vapour)<\/strong><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td align=\"center\"><strong>[mg\/m\u00b3]*<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>0<\/strong><\/td>\n<td align=\"center\">strengere Anforderungen als Class 1<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td align=\"center\">(as specified)<\/td>\n<\/tr>\n<tr>\n<td><strong>1<\/strong><\/td>\n<td align=\"center\">\u2264 0.01<\/td>\n<\/tr>\n<tr>\n<td><strong>2<\/strong><\/td>\n<td align=\"center\">\u2264 0.1<\/td>\n<\/tr>\n<tr>\n<td><strong>3<\/strong><\/td>\n<td align=\"center\">\u2264 1.0<\/td>\n<\/tr>\n<tr>\n<td><strong>4<\/strong><\/td>\n<td align=\"center\">\u2264 5.0<\/td>\n<\/tr>\n<tr>\n<td><strong>X<\/strong><\/td>\n<td align=\"center\">&gt; 5.0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"margin-left: auto;margin-right: auto;margin-top:10px;width:100%;\"><\/div><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-text fusion-text-8\"><p>* at reference conditions of 20 \u00b0C, 1 bar(a), 0% relative humidity<\/p>\n<\/div><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"margin-left: auto;margin-right: auto;margin-top:20px;width:100%;\"><\/div><div class=\"fusion-sep-clear\"><\/div><div class=\"fusion-text fusion-text-9\"><p><strong>1.4 Compressed air filtration requirements depending on the desired compressed air quality<\/strong><\/p>\n<p>Because of the enormous number of particles in compressed air, <strong>setting up a filtration train<\/strong> is crucial to the safety and reliability of the production process.<\/p>\n<p>Which filter type or filter combination suits your specific needs depends on which compressed air quality class according to DIN ISO 8573-1 your application requires.<\/p>\n<p>Choosing the right compressed air filters is decisive for compressed air quality. By combining different filters with different filtration grades in the compressed air system, it may be possible to achieve <strong>higher purity classes according to DIN ISO 8573-1<\/strong>.<\/p>\n<p><strong>We are happy to advise you on all aspects of compressed air treatment and filtration!<\/strong><\/p>\n<\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-4 fusion_builder_column_1_1 1_1 fusion-one-full fusion-column-first fusion-column-last\" style=\"--awb-bg-size:cover;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-column-wrapper-legacy\"><div class=\"fusion-widget-area awb-widget-area-element fusion-widget-area-1 fusion-content-widget-area\" style=\"--awb-title-size:22px;--awb-title-color:#3a4149;--awb-padding:0px 0px 0px 0px;\"><div class=\"fusion-additional-widget-content\"><\/div><\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":37442,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[602,599],"tags":[],"class_list":["post-95328","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-compressed-air-optimisation-blog","category-optimisation-products-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Compressed Air Treatment: What You Need to Know<\/title>\n<meta name=\"description\" content=\"Untreated compressed air is anything but clean. 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