Thermostatic Radiator Valve DANFOSS RA-UR 3/8" Ovl 013G3297 (angle/union connection)

DANFOSS RA-UR 3/8" Ovl thermostatic radiator valve (angle/union connection) is a control valve for water-based heating systems designed to regulate radiator temperature automatically when combined with a compatible thermostatic head. The valve is built for installation on radiators with a 3/8" connection and provides reliable flow control to maintain set room temperatures and optimize heat distribution in residential and light-commercial installations.

Advantages

The valve offers precise modulation of hot water flow in response to the thermostatic head, enabling consistent temperature control and reducing overheating. Its angle/union connection simplifies replacement or service of the radiator without draining the entire system. Manufactured to meet industry standards, the valve provides robust operation, corrosion resistance and a compact form factor that fits most radiator fittings with a 3/8" inlet.

Suitable for

• Domestic radiators in apartments and houses
• Small commercial radiator installations such as offices or guest rooms
• Retrofit projects where existing valves use a 3/8" connection
• Systems requiring thermostatic temperature control for energy efficiency

Key specifications

• Connection type: angle with union for 3/8" radiator inlet
• Working media: hot water for closed heating systems
• Control method: thermostatic actuation via external thermostatic head
• Installation orientation: angled valve body suitable for side-mounted radiator inlets
• Typical application temperature range: compatible with standard central heating temperatures (design for hot water heating)

How to use

Mount the valve to the radiator’s 3/8" inlet following the radiator and valve manufacturer instructions and ensure the union nut is tightened to provide a leak-free seal. Fit a compatible DANFOSS or equivalent thermostatic head onto the valve’s spindle. Set the thermostatic head to the desired room temperature; the valve will modulate flow automatically to maintain the setpoint. Check for leaks after filling and pressurising the system, and bleed the radiator to remove trapped air before normal operation.

Usage recommendations

Use the valve together with a thermostatic head matched to the valve spindle and suitable for the ambient temperature range. When replacing an existing valve, verify the 3/8" connection and the angle orientation to ensure compatibility. Periodic inspection during annual heating system maintenance helps maintain performance and detect any leakage or wear early.