Four years ago a Canadian milk packager purchased a competitor’s twin tower desiccant dryer plus pre filters and after filters which were supplied by (2) 100 HP flooded screw compressors. Unfortunately, large amounts of oily liquids and dirt were getting past the pre filters into their desiccant dryer. The packager felt the contamination was not getting past the dryer into their product however to be safe, they changed the dryer’s desiccant bed

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