Air cooled condensers FN2,FN3,FN4 are air cooled heat exchangers for refrigeration system Air cooled condensers-FN-15,FN-18,FN- ... 22,FN25are air cooled heat exchangers for refrigeration systemThey are divided in ... 18,FN-22,FN25 have been tested on 2.8MPa air leakage, and the system is disposed of pollution,Applicable to ... systems. FN-15,FN-18,FN-22,FN25--Air cooled condensers