Parker BF-164S Bi-Flow Dryer 1/2 In Sweat

Parker BF-164S Bi-Flow Dryer

The Parker BF-164S is a liquid line filter dryer designed for heat pump applications. It suits HVAC technicians servicing residential or light commercial systems that require bi-directional flow capability. The unit filters moisture and contaminants from refrigerant circuits during normal and reverse-cycle operation. It is not intended for large-capacity commercial chillers or industrial process cooling systems.

Sweat Connection Constraints

The 1/2 inch sweat connection requires brazing during installation, which demands appropriate torch equipment and nitrogen purge practices. The 6 1/16 inch overall length and 5 1/16 inch cut-out length define the fixed space needed in the liquid line. Systems using refrigerants outside the CFC, HCFC and HFC families cannot use this dryer. The 8 ton capacity rating for both R-22 and R-410A sets the maximum system size.

Installation Notes

Copper-to-copper brazing with phosphorus-bearing alloy is standard for the sweat fittings; flux is not required but nitrogen flow prevents internal oxidation. The steel shell must be protected from excessive heat during brazing to avoid damaging internal desiccant cores. Flow direction arrows must match the heat pump's cooling mode refrigerant path. Overheating the body or reversing the flow orientation are the most common field errors.