Danfoss 003N-4006 Repair Kit

The Danfoss 003N-4006 Repair Kit is a critical maintenance component designed for the Danfoss AVTA 15 thermostatic water valve. This 1/2-inch standard service kit allows for field-level restoration of valve performance without requiring full body replacement. It addresses common failure points such as bellows assembly fatigue and internal scale buildup that can impede precise temperature regulation. As a drop-in replacement part, it ensures the thermostatic element maintains its kv value and flow coefficient accuracy in cooling systems and industrial process applications. The kit includes the essential internal components needed to rebuild the self-acting controller, restoring the pressure-neutralized design and ensuring the valve responds accurately to temperature changes at the sensor. For contractors, utilizing the 003N4006 service kit minimizes downtime and maintains the integrity of the thermostatic cooling water valve system by preventing leaks and erratic temperature fluctuations in high-demand environments.

Key Technical Benefits

• Direct Compatibility: Specifically engineered for the Danfoss AVTA 15 series, ensuring tight tolerances and proper seating.
• System Efficiency: Restores the modulation of water flow to maintain target temperatures in closed-loop cooling systems.
• Durable Construction: Built with high-grade materials to resist mineral deposits and chemical additives found in industrial water supplies.
• Simplified Maintenance: Designed for rapid field installation to reduce labor hours and system downtime.

Common Questions & Technical Support

Will this kit work for all AVTA valves?
This specific kit is sized for the AVTA 15 (1/2") standard variants. Verify your valve's code number and port size before installation to ensure the diaphragm and bellows match the existing housing.

What are the signs that a 003N-4006 kit is needed?
Common indicators include the valve failing to close completely, sluggish response to temperature changes, or visible leakage from the packing gland or bellows area.

Does this include the temperature sensor?
No, this is a repair kit for the internal valve assembly. If the capillary tube or remote sensor bulb is damaged, the entire thermostatic element may need replacement.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.