this OEM blower wheel is designed with a standard 5/16" bore to match the factory inducer motor shafts found in compatible residential and commercial units

Using conductive colloidal silver on the shaft in the area of fiber contact is highly recommended

5 inches to match standard ductwork transitions

The kit features modular check valve cartridges constructed from durable glass-filled PPO

it provides the structural integrity necessary to prevent blade flex and vibration in high-tonnage package units and air-cooled chillers

Siemens Building Technology 257-02035 Valve Assembly 323269-701 this OEM blower wheel isThe Siemens 257 02035 is a 2 way normally open pneumatic valve assembly designed for precise flow control in HVAC terminal unit applications. This 1 2 inch assembly features an NPT x Union Male connection and an equal percentage flow characteristic with a 1. 0 Cv rating, ensuring stable modulating control in water or steam systems. Constructed with a forged brass body and durable brass trim, the unit is engineered for long term reliability under