Nara's liquid line and suction line filter-driers
are often referred to as System Protectors because they remove harmful
elements from the circulating refrigerant before serious damage results.
Keeping the system clean and free of foreign contaminants that can
restrict the operation of valves, block capillary tubes or damage
compressors is the best way to assure trouble-free operation. These
contaminants can be solids, such as metal filings, flux, dust and
dirt. Other equally menacing contaminants are solubles, such as acid,
water, resins and wax. The bead style filter-drier uses a less complicated
manufacturing process, so there is less change of error. The active
drying material is in the form of beads or pellets. No bonding material
is used to hold the beads together, but rather compacting is normally
performed through some type of mechanical pressure. On the upstream
side of the compacted beads is a filter network which cushions flow
and traps the solid contaminants. Nara filter-driers protect the refrigerant
system from liquid and solid contaminants.