Danfoss 013G-8039 Valve Insert

The Danfoss 013G-8039 is a precision-engineered RA-FN valve insert designed for high-performance hydraulic balancing in commercial and residential heating systems. Developed as a direct replacement component, this Danfoss radiator valve insert ensures consistent flow regulation without the need for a full valve body replacement, reducing labor costs and system downtime. It is specifically compatible with RA-FN series valve bodies and is optimized for non-pre-setting applications. The technical design features a high-grade EPDM O-ring and a stainless steel pressure pin to maintain a reliable seal against pitting and mineral buildup common in older hydronic loops. As a veteran technician knows, maintaining the integrity of the thermostatic radiator valve (TRV) assembly is critical for preventing short-cycling and ensuring even heat distribution across the zone. This insert allows for seamless integration with Danfoss thermostatic sensors, providing accurate temperature control and improved boiler return temperatures by preventing over-pumping through the terminal units.

• Rapid Servicing: Allows for the repair of malfunctioning RA-FN series valves without draining the entire system when used with the appropriate Danfoss demolition tool.
• Material Integrity: Constructed with corrosion-resistant brass and high-tensile internal springs to ensure long-term hydraulic stability under variable pressure.
• Standardized Fit: Engineered for precision tolerance matching, ensuring the Danfoss valve core seats perfectly to prevent bypass leakage.
• System Efficiency: Restores proper flow control to radiators, effectively eliminating hammering noises and cold spots caused by debris-clogged inserts.

Is this insert compatible with pre-setting RA-N valve bodies?
No, the 013G-8039 is specifically designed for RA-FN series (standard flow) bodies. For pre-setting applications that require localized balancing, the RA-N series inserts must be utilized to ensure correct flow coefficients.

Can I replace this insert while the system is under pressure?
Yes, this replacement valve insert can be swapped using the Danfoss 013G3084 tool, which allows for live maintenance, avoiding a full system knockdown and air-purging cycle.

What are the symptoms of a failing valve insert?
Common indicators include a radiator that remains hot despite the thermostatic head being closed, or a visible leak around the actuator pin, signaling the internal stuffing box or O-ring has reached its service life limit.

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.