When verifying HVAC motor specifications

replacing older part numbers like HN53HE122 and 43-040-131

reducing mechanical stress on the combustion chamber and improving overall furnace reliability

specifically designed for vertical air handler cabinets

This hysteresis synchronous motor driven actuator features a one-handed removal mechanism

Schneider Electric (Barber Colman) MK-6821 Proportional Control Els PW 17895 When verifying HVAC motor specificationsThe Schneider Electric (Barber Colman) MK 6821 Proportional Control is a rugged 50 square inch pneumatic valve actuator engineered for precise linear movement in commercial HVAC systems. This spring return actuator operates on a 8 13 PSI pneumatic signal range, providing reliable fail safe positioning during pressure loss. Encased in a durable Nema 1 enclosure, it features a 1 8" NPT air connection and a 1" nominal stroke, making it a standard choice