Pay in 4 interest-free payments of $64.17 Learn more
Ships within 48 hours · Estimated delivery Sep 13 - Sep 18
Common Questions What is the maximum current draw on the 24V side
ensuring the valve remains in its last position upon loss of power
providing precise temperature sensing and control for optimal boiler safety switch functionality
A reset may only temporarily clear the error
making it ideal for standard temperature regulation where cycle timing must remain consistent
Schneider Electric (Barber Colman) MK-3121 Actuator 30067439-890 Common Questions What is theOptimize your pneumatic control systems with the Schneider Electric MK 3121 Actuator, a precision engineered proportional pneumatic damper actuator designed for the professional HVACR contractor. This rugged unit features a 8 to 13 PSI spring range and a versatile 2 to 4 inch adjustable stroke, allowing for exact field calibration in air handling units, mixing boxes, and VAV systems. The MK 3121 is the primary direct replacement for legacy models MK