The Barber Colman N800-4305 is a precision replacement spring designed for use with M573 series pneumatic actuators. This spring is a key component in restoring the actuator’s spring return functionality, providing reliable fail-safe positioning when control air pressure is lost. Manufactured to meet original Barber Colman specifications, the N800-4305 ensures consistent performance and is ideal for preventive maintenance or actuator repair.
Technical Specifications
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Model: N800-4305
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Type: Replacement Spring
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Function: Spring Return Mechanism
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Compatible With: Barber Colman M573 Series Pneumatic Actuators
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Material: High-tension steel
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Condition: New
Key Features
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Factory-original replacement spring for M573 actuators
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Maintains spring return integrity for safety and control
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Built for durability and repeated cycling under load
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Ideal for extending the life of your actuator without full replacement
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Ensures reliable operation in HVAC and industrial systems
Compatible Applications
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HVAC air dampers and ventilation systems
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Valve actuation in process and energy management
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Pneumatic zone control with fail-safe requirements
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Any system using Barber Colman M573 actuators
Installation & Maintenance Notes
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Always depressurize actuator before servicing
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Replace spring following manufacturer guidelines
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Verify full stroke and return action after installation
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Inspect internal components for wear or damage during service
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Use genuine OEM parts to preserve actuator performance and warranty
We ship this product worldwide! Delivery is normally stock.
Request a Quote now or call us at 1-800-755-2883 for expert assistance