the AF-2 airflow detector is a robust choice for proving airflow in systems where high-velocity switches fail to actuate

and Lennox (replacing 51H25)

while integrated flame current test pins allow for rapid signal verification using a standard DC micro-ammeter

making it a preferred choice for technicians seeking OEM HVACR replacement parts

Optimized Performance: Efficient 35

SKF Bearings 6311 Bearing Freon the AF-2 airflow detector isThe SKF 6311 Bearing is a high performance deep groove ball bearing engineered for heavy duty industrial applications, particularly within HVACR motor and pump systems. Designed with a 55mm inside diameter and 120mm outside diameter, this SKF Explorer class component is optimized for high speed operation, featuring a reference speed of 12,000 r min and a limiting speed of 8,000 r min. Its uncoated steel cage and single row construction provide the