Barber Colman M573-3520 Actuator

The Barber Colman M573-3520 is a pneumatic damper actuator designed for precise proportional control in HVAC systems. Featuring a 3-inch stroke and operating within a 5 to 10 psig spring range, it is suitable for applications requiring accurate modulation of dampers.​

Technical Specifications

  • Model: M573-3520

  • Type: Pneumatic damper actuator

  • Stroke Length: 3 inches

  • Spring Range: 5 to 10 psig

  • Effective Diaphragm Area: 7 in² (45 cm²)

  • Mounting: Post-mounted with clevis and pin

  • Spring Return: Yes; retracts actuator shaft upon air pressure loss

  • Construction: Rigid, corrosion-resistant glass-filled nylon body; 303 stainless steel shaft

  • Air Connections: Barbed fitting for 1/4″ O.D. plastic tubing

  • Operating Temperature Range: -20°F to 180°F (-29°C to 82°C)

  • Condition: New​

Key Features

  • Provides precise proportional control for HVAC dampers

  • Spring return mechanism ensures safety during air pressure loss

  • Compact design suitable for various installations

  • Designed for 5 to 10 psig control signals

Compatible Applications

  • HVAC systems requiring modulating damper control

  • Ventilation and exhaust systems

  • Industrial process control requiring pneumatic actuation

Installation & Maintenance Notes

  • Ensure proper alignment during installation to prevent binding

  • Verify pneumatic connections are secure and leak-free

  • Regularly inspect actuator for signs of wear or damage

  • Follow manufacturer guidelines for maintenance procedures


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