Domnick Hunter Compressed Air Dryers - regula servis

Air qualityAdsorption dryers remove water vapour by passing air over aregenerative adsorbent material known as desiccant, which stripsthe moisture from the air. All adsorption dryers remove water vapourusing this method, however the adsorbent must be periodicallyregenerated to ensure a continuous supply of dry air. A numberof different regeneration methods are available.Pressure Dewpoint (Pdp)Pressure dewpoint is the term used to describethe temperature at which condensation will occurand the water removal efficiency of a dryer isexpressed as a pressure dewpoint (written as atemperature). Adsorption dryers are extremelyefficient and typically provide pressure dewpoint’sof -40°C or -70°C. This means for water vapour tocondense into a liquid, the air temperature wouldneed to drop below -40°C or -70°C respectively.Typically, a pressure dewpoint of -40°C is usedin most applications as compressed air witha dewpoint below -26°C will not only preventcorrosion, it will also inhibit the growth of microorganismswithin the compressed air system.PNEUDRI utilises four key features toguarantee the required pressure dewpoint.OIL-X EVOLUTION pre & after filtrationAdsorption dryers are designed only for the removal of water vapour,and not liquid water, water aerosols, oil, particulates or microorganisms.Only by using Parker domnick hunter OIL-X EVOLUTIONpre and after filtration can the removal of these contaminants beguaranteed and air quality in accordance with ISO 8573-1 : 2001 bedelivered.Adsorbent desiccant materialSelected for optimum dewpoint performance, dryers delivering a -40°Cpressure dewpoint utilise a split bed of activated alumina andmolecular sieve. For critical applications, dryers delivering a -70°Cpressure dewpoint are filled with a special blend of silica gel andmolecular sieve.5PNEUDRI MiDAS DryerAll desiccant materials are specially selected to provide:• Optimum adsorption and regenerationcapacity - to ensure consistentdewpoint• Low dusting - to prevent blockageof downstream filtration• High crush strength - to preventbreakdown of the desiccant duringoperation• High resistance to aggressive andoil-free condensate - for compatibilitywith all types of air compressor, theirlubricants and condensate