The air produced by the compressor has a temperature above 35 (C). Circulating through the after cooler designed and installed on all our compressors the reaches a lower temperature and considerable amount of liquid particles are removed, which water trap has a key efficiency in this procedure. A main reason for using a water Trap is that after the air reaches the storage tank, during different stages of compressing air many impurities have been added to the air and need to be removed.