Issue link: https://onenorgren.uberflip.com/i/1395383
04 Effective Air Preparation There are several types of contaminants in a compressed air line. The most common are particulate, water, and oil. Selecting the most appropriate filter(s) depends on the process requirements. General- purpose filters remove particles and liquid bulk water, and should be included in all pneumatic systems. Coalescing/oil removal filters remove liquid oil as well as extremely small particles (down to 0.01 microns). Vapour removal filters remove oil vapour, eliminating odour. International Standards Many compressed air filter manufactures test their products against ISO 8573 air purity classes which quantify the contaminants listed above that are allowed in each cubic metre of compressed air. The table below outlines the purity classes and additional detail can be found on www.iso.org. Norgren's Excelon Plus range is tested in accordance with ISO 12500, used to qualify a filter's air purity class according to ISO 8573. Clogged filters lower the efficiency of the compressor, limit the flow of air through lines, and generally increase energy costs. Having filter elements replaced regularly is a first line function of maintaining your compressed air system. Norgren's Excelon® Plus is designed with a unique maintenance system. The filter element is removed together with the bowl which means minimal bowl removal clearance is needed and servicing is quick and simple. General Purpose Filter 1 Maintain filters regularly 2 Use the right filter 'Puraire' Coalescing Filter F82 F84 ISO 8573-1:2010 Purity classes ISO8573-1-2010 Class Solid Particulate Water Oil By Particle Size (Max. # number of particles per m³) Mass Concentration mg/m³ Vapor pressure Dewpoint Liquid g/m³ Total Oil (Aerosol liquid & vapor) 0.1 - 0.5 micron 0.5 - 1 micron 1- 5 micron mg/m³ 0 As specified by the equipment user or supplier, and more stringent than Class1 1 ≤ 20,000 ≤ 400 ≤ 10 - ≤ -70°C - ≤0.01 2 ≤ 400,000 ≤ 6,000 ≤ 100 - ≤ -40°C - ≤0.1 3 - ≤ 90,000 ≤ 1,000 - ≤ -20°C - ≤1 4 - - ≤ 10,000 - ≤ +3°C - ≤5 5 - - ≤ 100,000 - ≤ +7°C - - 6 - - - ≤ 5 ≤ +10°C - - 7 - - - 5 - 10 - ≤0. 5 - 8 - - - - - 0.5 - 5 - 9 - - - - - 5 - 10 - X - - - >10 - >10 >10