Honeywell MS8120A1205 Spring Return Damper Actuator

Technical Specifications

  • Actuator Type: Damper, Valve
  • Control Signal: SPST (Single Pole, Single Throw), 2-position
  • Supply Voltage: 24 Vac ±20%
  • Frequency: 50 Hz / 60 Hz
  • Torque: 175 lb-in (20 Nm)
  • Rotational Stroke: 95° ±3°
  • Spring Return Time: 20 seconds (maximum)
  • Nominal Driving Time at 60 Hz: 45 seconds
  • Internal Auxiliary Switches: 2
  • Switch Ratings: 250 Vac, 5 A res (3 A ind)
  • Shaft Adapter Type: Self-centering clamping
Category:
Description
  • Manual Operation: Manual crank
  • Mounting: Direct coupled
  • Dimensions: 9.72 inches (H) x 3.94 inches (W) x 2.95 inches (D) / 247 mm (H) x 100 mm (W) x 75 mm (D)
  • Weight: 6 lb (2.72 kg)
  • Compatible Damper Shafts: 3/8 to 1.06 inches round or 3/8 to 11/16 inches square
  • Ambient Temperature Range: -40°F to 140°F (-40°C to 60°C)
  • Operating Humidity Range: 5 to 95% RH, non-condensing
  • Certifications: UL873, cUL, CE, C-Tick

Functional Characteristics

  • Spring Return Mechanism: Ensures fail-safe operation by automatically returning the damper to its default position in the event of a power failure or control signal loss.
  • High Torque Output: Provides sufficient force to drive dampers of various sizes and configurations.
  • Precise Control: Offers accurate positioning of the damper, ensuring optimal airflow and temperature regulation.
  • Durable Construction: Built with high-quality materials to withstand harsh industrial environments.
  • Easy Installation: Direct coupled mounting and self-centering shaft adapter simplify the installation process.
  • Manual Override: Features a manual crank for easy operation and maintenance in the absence of power or control signals.
  • Visual Indication: Includes a position indicator and scale for easy monitoring of the damper’s position.
  • Flexible Configuration: Spring return direction can be selected on-site to meet specific application requirements.

Application Scenarios

  • HVAC Systems: Used to control dampers in heating, ventilation, and air conditioning systems, ensuring precise temperature and airflow regulation.
  • Industrial Automation: Applied in factories and manufacturing plants to monitor and control process variables, enhancing efficiency and safety.
  • Power Generation: Utilized in power plants for grid control, generator monitoring, and energy management, contributing to stable and reliable power supply.
  • Water and Wastewater Treatment: Monitors and controls water treatment processes, including level control, pump operations, and chemical dosing, to ensure water quality and safety.
  • Building Automation: Manages building systems such as lighting, ventilation, and security, enhancing energy efficiency and occupant comfort.
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