The Barber Colman MK-4801 is a pneumatic valve actuator designed for precise control of HVAC and industrial valve applications. Operating within a 3 to 8 psig spring range, it provides reliable modulation of valve positions. The actuator features a spring return mechanism that retracts the actuator shaft and raises the valve stem upon loss of air pressure, ensuring fail-safe operation.
Technical Specifications
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Model: MK-4801
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Type: Pneumatic valve actuator
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Control Signal: Proportional or two-position (based on controller setup)
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Spring Range: 3 to 8 psig
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Maximum Air Pressure: 30 psig
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Spring Return: Yes; retracts actuator shaft and raises valve stem on air pressure loss
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Mounting: Compatible with 1½” to 2″ VB-9xxx series valves
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Enclosure Rating: NEMA Type 1
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Condition: New
Key Features
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Provides precise control for HVAC and industrial valves
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Spring return mechanism ensures safety during air pressure loss
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Compact design suitable for various installations
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Designed for 3 to 8 psig control signals
Compatible Applications
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HVAC systems requiring modulating valve control
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Industrial processes involving fluid regulation
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Systems utilizing VB-9xxx series valves
Installation & Maintenance Notes
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Ensure proper alignment when mounting to compatible valves
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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.
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