The Barber Colman MK-3121 is a pneumatic damper actuator designed for precise proportional control in HVAC systems. Featuring an adjustable stroke length and operating within an 8 to 13 psig spring range, it is suitable for applications requiring accurate modulation of dampers.
Technical Specifications
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Model: MK-3121
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Type: Pneumatic damper actuator
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Effective Diaphragm Area: 8 in² (52 cm²)
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Spring Range: 8 to 13 psig
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Stroke Length: Adjustable from 2″ to 4″ (51 to 102 mm)
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Maximum Air Pressure: 30 psig (207 kPa)
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Air Connections: 1/8″ FNPT
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Mounting: Universal mounting options
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Construction: Die-cast aluminum housing with beaded molded neoprene diaphragm
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Operating Temperature Range: -20°F to 160°F (-29°C to 71°C)
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Condition: New
Key Features
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Provides precise proportional control for HVAC dampers
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Adjustable stroke length allows for flexibility in application
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Spring return mechanism ensures safety during air pressure loss
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Compact design suitable for various installations
Compatible Applications
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HVAC systems requiring modulating damper control
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Ventilation and exhaust systems
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Industrial process control requiring pneumatic actuation
Installation & Maintenance Notes
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Ensure proper alignment during installation to prevent binding
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Verify pneumatic connections are secure and leak-free
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Regularly inspect actuator for signs of wear or damage
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Follow manufacturer guidelines for maintenance procedures
We ship this product worldwide! Delivery is normally stock.
Request a Quote now or call us at 1-800-755-2883 for expert assistance