The Barber Colman MA-5211-500 is a two-position spring return actuator designed for use with SPST control signals in HVAC and industrial automation systems. This robust actuator features a hydraulic, oil-immersed motor and pump system for smooth operation and long-term durability. The “-500” model includes a built-in, adjustable SPDT auxiliary switch for enhanced control capabilities. It is available in damper configurations or as a base unit for integration with valve or damper linkages.
Technical Specifications
-
Model: MA-5211-500
-
Control Type: Two-position
-
Return Type: Spring return
-
Control Signal: SPST (Single Pole Single Throw)
-
Voltage Options: 24 Vac, 120 Vac, 240 Vac models available
-
Auxiliary Switch: Adjustable SPDT (built-in)
-
Housing:
-
Lower: Die cast with 1/2″ conduit opening
-
Upper: Painted steel
-
-
Motor Type: Hydraulic with oil-immersed motor and pump
-
Condition: New
Key Features
-
Two-position actuator ideal for open/close applications
-
Spring return for fail-safe positioning
-
Built-in, field-adjustable SPDT auxiliary switch for end-of-travel signaling
-
Rugged housing for demanding environments
-
Available in damper or base models for flexible installations
-
Hydraulic operation provides smooth, powerful motion
-
Suitable for HVAC dampers or valve control with appropriate linkage kits
Compatible Applications
-
Commercial and industrial HVAC systems
-
Damper and valve actuation
-
Boiler draft control
-
Combustion air and flue gas dampers
-
Systems requiring mechanical fail-safe positioning
Installation & Maintenance Notes
-
Match actuator voltage to controller supply
-
Use included auxiliary switch for status indication or interlock triggering
-
Install using proper damper or valve linkage depending on model
-
Confirm spring return direction during commissioning
-
Periodically inspect hydraulic components and housing integrity
We ship this product worldwide! Delivery is normally stock.
Request a Quote now or call us at 1-800-755-2883 for expert assistance