The new refrigerant and lubricant combinations that have come in the wake of the regulation of CFCs and HCFCs have brought many changes to liquid-line filter-driers. The introduction of R-410A and polyolester (POE) has created many design challenges as far as water and solid contaminant removal, refrigerant and lubricant compatibility, and increased working pressures of the systems.
The following overview describes how engineers have met the challenges of working with R-410A.