Schneider Electric (Barber Colman) MK-6821 Proportional Control R-410A Professional installation allows for mounting

Professional installation allows for mounting in any position except upside down to prevent debris from fouling the internal valve seat

The 150 PSI rating refers to the maximum operating pressure

Technical alignment with the pressure switch settings is essential for consistent ignition cycles and preventing limit-switch trips

Common Questions: Will this kit work for both AC and DC solenoid configurations

OEM Compatibility: An authentic Trane VAL5023 part ensures a perfect fit for Trane furnace

Schneider Electric (Barber Colman) MK-6821 Proportional Control R-410A Professional installation allows for mountingThe 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