Danfoss 013G-8591 Socket Body

The Danfoss 013G-8591 RA-N Series Straight Socket Body is a precision-engineered 1/2-inch NPT thermostatic radiator valve (TRV) designed for high-performance hydronic distribution. This nickel-plated brass body is critical for balancing two-pipe heating systems, featuring a built-in manual pre-setting ring that allows for accurate flow limitation without the need for specialized tools. This ensures optimal system delta-T and prevents over-pumping. The internal O-ring stuffing box is serviceable while the system is under pressure, a necessity for commercial maintenance schedules where downtime isn’t an option. Engineered for compatibility with all Danfoss RA2000 series operators, including snap-action thermostatic sensors and thermal actuators, this socket body handles pressure differentials up to 15 psi while maintaining quiet operation. For contractors retrofitting older steam or hot water systems, the 013G-8591 provides a reliable interface for modern zone control and energy management improvements.

• Internal Pre-setting: Allows for precise kv/cv flow adjustment (0.04 to 0.73 Cv) to ensure balanced heat distribution.
• Durable Construction: Nickel-plated brass body prevents corrosion and withstands temperatures up to 250°F and working pressures of 150 psi.
• Live Serviceability: The packing gland can be replaced while the system is live, minimizing labor hours during routine maintenance.
• RA2000 Integration: Seamless snap-on connection for Danfoss thermostatic wall sensors and remote dials.
• Universal Compatibility: Standard 1/2" NPT inlet/outlet facilitates easy integration into existing American hydronic piping.

Is this socket body compatible with steam systems?
Yes, the 013G-8591 is rated for low-pressure steam applications (maximum 15 psig), though it is most commonly utilized in forced hot water hydronic systems.

Can the flow rate be adjusted after the actuator is installed?
The manual pre-setting dial is located beneath the thermostatic operator. You must remove the sensor head to access the setting ring, which allows for 14 different flow increments plus an 'N' (fully open) setting.

What is the maximum differential pressure for quiet operation?
For noise-free performance in residential or quiet commercial zones, it is recommended to maintain a differential pressure below 3 psi, though the valve can operate up to 15 psi.

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.