Danfoss 013U-8063 Operator

The Danfoss 013U8063 RA 2000 Thermostatic Operator is a heavy-duty, vapor-charged sensing element designed for precise hydronic temperature control in commercial and residential heating systems. Engineering for compatibility with RA 2000 series valves, this operator features a wide adjustment range of 77-149°F, making it ideal for high-temperature applications where standard domestic sensors fail to meet the setpoint requirements. The integrated liquid-filled sensor ensures reactive response times to ambient temperature shifts, maintaining consistent mass flow through the heat exchanger. Technicians often specify the 013U-8063 for its robust limit-stop functionality, which allows for locking or limiting the temperature range to prevent unauthorized adjustments in public spaces. This non-electric thermostatic head operates via a brass bellows system, providing reliable modulation without the need for external power or complex wiring, simplifying HVAC zone control retrofits.

Key Technical Benefits

• Wide Temperature Range: Rated for 77-149°F (25-65°C), allowing for specialized industrial and commercial heating profiles.
• Vapor-Charge Technology: Provides faster reaction times compared to wax-filled operators, ensuring tighter hydronic balancing.
• Direct Mount Compatibility: Designed for seamless installation on Danfoss RA valves using a secure, standard connection.
• Tamper Resistance: Features built-in pins for locking or limiting setpoints to maintain system design parameters.
• Energy Efficiency: Optimizes TRV (Thermostatic Radiator Valve) performance by preventing overheating and reducing boiler cycling.

Common Installation Questions

What valves are compatible with the Danfoss 013U8063?
This operator is designed specifically for the Danfoss RA 2000 series valve bodies. It is a direct fit for standard RA-N and RA-C valves frequently used in two-pipe heating systems.

Can the 013U-8063 be used for underfloor heating manifolds?
Yes, given its high-end setpoint of 149°F, it is often utilized in radiant floor heating applications where higher return water temperatures are managed via a mixing loop.

Does this operator require vertical or horizontal installation?
For the most accurate temperature sensing, the operator should be installed horizontally. Vertical installation can lead to "false readings" caused by convective heat rising from the valve body and pipework.

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.