Description
The Belimo B261+ARX24-3-T N4 is a factory-assembled two-way characterized control valve engineered for reliable hydronic flow control in demanding HVAC environments. It pairs a 2.5 inch valve body with a non spring return 24 V actuator supporting on/off and floating point control in a sealed NEMA 4X enclosure.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Belimo |
| Category |
Control Valves |
| Part Number |
B261+ARX24-3-T N4 |
| Subcategory |
Characterized Control Valves |
| Valve Size |
2.5 in [65 mm] |
| Valve Type |
2-way |
| Cv Rating |
60 |
| Flow Characteristic |
Equal percentage |
| Flow Pattern |
2-way |
| Controllable Flow Range |
75° |
| Leakage Rate |
0% (A–AB) |
| Fluid Type |
Chilled or hot water, up to 60% glycol |
| Fluid Temperature Range |
-18…100°C [0…212°F] |
| Body Pressure Rating |
400 psi |
| Close-Off Pressure |
100 psi |
| Pipe Connection |
NPT female |
| Valve Body Material |
Nickel-plated brass |
| Stem Material |
Stainless steel |
| Seat Material |
PTFE |
| Nominal Voltage |
AC/DC 24 V |
| Control Type |
On/Off, Floating Point |
| Power Consumption (Operation) |
2.5 W |
| Power Consumption (Rest) |
0.5 W |
| Transformer Sizing |
5.5 VA |
| Actuator Rotation |
90°, adjustable |
| Running Time (Motor) |
90 or 150 s / 90° |
| Degree of Protection |
IP66/67, NEMA 4X |
| Ambient Temperature |
-30…50°C |
| Weight |
10.1 lb |
Information About B261+ARX24-3-T N4
The B261+ARX24-3-T N4 belongs to Belimo’s characterized control valve assemblies designed to deliver accurate and energy-efficient hydronic regulation. The valve incorporates an equal percentage characteristic with a TEFZEL® characterized disc to maintain stable control across varying load conditions. Its integrated ARX24-3-T N4 actuator provides non fail-safe operation with on/off and floating point control, suitable for robust HVAC control strategies. Factory assembly ensures precise valve-to-actuator alignment, reduces installation effort, and supports long-term reliability in harsh indoor or outdoor environments.
Key Features
- Two Way Characterized Valve Design: Provides precise hydronic flow control with an equal percentage characteristic for consistent system performance.
- Non Spring Return Actuator: Powered positioning without fail-safe spring action supports applications where return on power loss is not required.
- On Off And Floating Point Control: Enables simple, reliable control methods commonly used in large hydronic systems.
- Rugged NEMA 4X Enclosure: IP66/67 rated actuator housing protects against moisture, dust, and corrosion in demanding installations.
- Zero Leakage Construction: Precision valve components ensure tight shutoff and reliable flow isolation.
- Electronic Overload Protection: Protects actuator components throughout the full rotation range to extend service life.
- Manual Override Access: Allows local valve positioning during commissioning or maintenance without external power.
The B261+ARX24-3-T N4 delivers the reliability and precision required for dependable two-way hydronic flow control in challenging HVAC applications.
