The refrigerant must be clear and dry before entering into the expansion valve in the refrigerating recycle system, otherwise the contaminant will cause jam for expansion valve, And will cause ice jam if have the water. In order to prevent the above two bad results, We need to install an filter drier before the refrigerant

enters in to the expansion valve. It filtrate the scrap iron and welding slag. And dry the water in system. The JRA liquid line filter drier is a premium compacted bead filter drier with a fine 20 micron fine outlet pad for maximum filtration.