Schneider Electric MK-3101 Pneumatic Damper Actuator 3-8 PSI 2-4" Stroke

The Schneider Electric (Barber Colman) MK-3101 is a proportional pneumatic damper actuator designed for precise control of dampers, mixing boxes, and air valves in commercial and industrial HVAC systems. This reliable actuator converts pneumatic control signals into smooth mechanical motion to modulate airflow and maintain optimal temperature control.

Key Specifications:

• Operating pressure range: 3 to 8 PSIG (21-55 kPa)
• Adjustable stroke: 2 to 4 inches (nominal 3.5 inches)
• Effective area: 8 square inches (52 cm²)
• Torque output: 21 lb-in nominal
• Maximum air pressure: 30 PSIG
• Air connections: 1/8" FNPT
• Spring return: Retracts actuator shaft on loss of air pressure

Construction and Features:

• Die-cast aluminum housing for durability and corrosion resistance
• Replaceable beaded molded neoprene diaphragm
• Can be mounted in any position for installation flexibility
• Includes mounting bracket, linkage, and connector hardware
• Compatible with zone dampers, VAV boxes, and smaller HVAC applications

The MK-3101 is part of the trusted MK-3000 Series from Schneider Electric, known for reliable performance in demanding HVAC environments. The spring return feature ensures fail-safe operation by automatically returning the damper to its default position if air pressure is lost, enhancing system safety and reliability.