Greenheck 458072 Bearing 328140-751 as this safety shut-off device

as this safety shut-off device acts as the final line of defense against venting failure

it acts as a primary safeguard

Replaceable Orifice: The AKV 15-1 orifice assembly is fully field-replaceable

Designed for precision fitment in Lochinvar Knight and A

It requires specific low-voltage signals from a compatible control board and cannot be powered directly by line voltage alone like a standard induction motor

Greenheck 458072 Bearing 328140-751 as this safety shut-off deviceThe Greenheck 458072 is a precision engineered OEM replacement bearing specifically designed for high performance fan assemblies and ventilation systems. This ball bearing insert comes integrated with a protective rubber boot, which provides critical isolation to dampen vibration and reduce acoustic hum in sensitive ductwork. Developed to meet strict Greenheck centrifugal fan specifications, this component ensures your blower wheel remains centered