Schneider Electric (Barber Colman) MK-4421 Actuator R-410A Built for the rigors of

Built for the rigors of commercial and industrial hydronic applications

with a maximum of 1/2 PSI

Real-Time Diagnostics: High-visibility LED indicators allow for rapid system inspections and verification of airflow logic

This fault usually indicates the Trane SWT2521 is not sensing a sufficient vacuum

Automatic Reset Functionality: Minimizes downtime by automatically restoring the SPDT circuit once pressure returns to safe operating levels

Schneider Electric (Barber Colman) MK-4421 Actuator R-410A Built for the rigors ofThe Schneider Electric (Barber Colman) MK 4421 is a heavy duty pneumatic damper actuator engineered for proportional or two position control in demanding HVACR applications. This spring return actuator is the designated direct replacement for M593 5095 and M693 5095 models, ensuring seamless integration into existing Barber Colman pneumatic control systems. Featuring a rugged cast aluminum housing and a durable neoprene diaphragm, the MK 4421 provides