Emerson Alco 043337 Filter Drier

The Emerson Alco 043337, also identified by model number BFK-164S, is a high-capacity bi-directional liquid line filter drier engineered specifically for heat pump applications. Featuring a 1/2" ODF sweat connection and a 16 cubic inch desiccant volume, this unit utilizes a specialized internal check valve system that ensures flow filtration in both heating and cooling modes without requiring external check valves. The solid core composition is optimized for high moisture removal and effective acid remediation, protecting the expansion valve from particulate debris as small as 40 microns. With a 680 PSI maximum working pressure, it is fully compatible with high-pressure refrigerants including R-410A and various HFC/POE oil configurations. This liquid line drier is a critical component for system dehydration and preventing capillary tube or TXV freeze-ups in demanding cycles.

Key Benefits

• Bi-directional flow capability eliminates the need for external check valves in heat pump liquid lines.
• High-performance filter drier desiccant provides superior moisture and acid capacity for long-term compressor protection.
• Rugged steel shell construction with 1/2" sweat connections ensures leak-proof integration in high-vibration environments.
• Optimized for R-410A compatibility and high-pressure operational safety up to 680 PSI.
• Internal check valves offer low pressure drop while maintaining 40-micron filtration efficiency.

Common Questions

Is the BFK-164S compatible with both R-22 and R-410A systems?
Yes, the 043337 is designed to handle the higher pressures of R-410A while maintaining compatibility with R-22 and other HFC or HCFC refrigerants using mineral or POE oils.

Does this filter drier require a specific orientation during installation?
While it is bi-directional, it should be installed in the liquid line according to standard piping practices. The internal check valves automatically manage flow direction changes during heat pump reversals.

What is the micron rating for the BFK series?
This unit provides 40-micron filtration, which is the industry standard for preventing particulate matter from fouling precision metering devices like TXVs.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.