Barber Colman MA-318 Actuator

The Barber Colman MA-318 is a compact, oil-submerged electric damper actuator designed for two-position (on/off) control in HVAC systems. Operating on 24 VAC, it delivers 60 in-lb of torque and features a spring return mechanism to ensure dampers return to a fail-safe position upon power loss. Its robust construction and reliable performance make it suitable for various commercial and industrial applications.​

Technical Specifications

  • Model: MA-318

  • Type: Electric damper actuator

  • Control Signal: 2-position (on/off)

  • Voltage: 24 VAC

  • Frequency: 50/60 Hz

  • Torque: 60 in-lb

  • Power Consumption: 70 W running, 25 W holding

  • Spring Return: Yes

  • Mounting Orientation: Output shaft must be horizontal

  • Dimensions: 7.25″ x 7.45″ x 8.75″

  • Weight: Approximately 8.78 lbs

  • Protection Rating: NEMA 1

  • Condition: New​

Key Features

  • Provides reliable two-position control for HVAC dampers

  • Spring return mechanism ensures safety during power outages

  • Oil-submerged design enhances durability and performance

  • Compact size suitable for various installations

  • Designed for 24 VAC power supply

Compatible Applications

  • HVAC systems requiring two-position damper control

  • Ventilation and exhaust systems

  • Applications where fail-safe damper positioning is critical

Installation & Maintenance Notes

  • Ensure proper alignment during installation to prevent binding

  • Verify electrical connections match the actuator’s specifications

  • Regularly inspect for signs of wear or damage

  • Follow manufacturer guidelines for maintenance procedures


We ship this product worldwide! Delivery is normally stock.

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