Sunday, December 4, 2011

Protect you refrigerated air dryer with proper filtration

Author: David J. Connaughton
Blog: Compressed Air the Fourth Utility

Refrigerated dryers rely on HCFC (Hydrochlorofluorocarbons) to cool compressed air and therefore lower the dewpoint of the compressed air. In a new system, the cooling is quite efficient and dewpoints of as low as 35F (2C) can be achieved with a refrigerated dryer. Over time, the cooling coils lose their efficiency due to pipe scale, oil and water build up on the cooling coils. It is not uncommon to test dewpoints after a refrigerated dryer and find them >60F (16C). The indicators on the front of refrigerated dryers do not indicate the dewpoint but rather the temperature of the coils. Therefore, Balston recommends that you install a a coarse coalescing filter (grade DX) - immediately upstream of the dryer. To prevent carryover of condensate from the dryer or carryover of any pre-existing oils for a used dryer, a final fine coalescing filter (grade BX) is recommended.

If you would like more information about Parker Balston please contact Forberg Scientific Customer Service.
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