... exchangers for refrigeration system Air cooled condensers-FN-15,FN-18,FN-22,FN25are air cooled heat exchangers for refrigeration systemThey are ... 2groups: FN, L.Air cooled condensers-FN-15,FN-18,FN-22,FN25 have been tested on 2.8MPa air leakage, and ... ,Applicable to R22,R134a,R404A,R407C systems. FN-15,FN-18,FN-22,FN25--Air cooled condensers