It uses a threaded coupling for direct mounting to the valve bonnet

this DD9-9A model is constructed with 43 forward-curved blades using galvanized cold-rolled steel for superior corrosion resistance and structural integrity

This specific model is designed for clockwise (CW) rotation when viewing from the discharge side (lead edge leading)

Proper fan blade selection is vital

Lau 02895806 Blower Wheel R-407C It uses a threaded couplingThe Lau 02895806 Blower Wheel is a precision engineered double inlet blower wheel designed for high performance direct drive HVAC applications. As a veteran technician, you know that matching exact specifications is critical for maintaining system pressure and airflow. This unit features a 5 3 4" diameter and an 8 1 2" width, constructed from high grade aluminum for a lightweight yet rigid profile that resists corrosion and reduces bearing load. With