Description
The Belimo B350+ARX24-3-T N4 is a factory-assembled three-way characterized control valve engineered for accurate mixing or diverting control in hydronic HVAC systems. It combines a 2 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 |
B350+ARX24-3-T N4 |
| Subcategory |
Characterized Control Valves |
| Valve Size |
2 in [50 mm] |
| Valve Type |
3-way mixing/diverting |
| Cv Rating |
57 |
| Flow Characteristic |
A-port equal percentage, B-port modified |
| Flow Pattern |
3-way |
| Controllable Flow Range |
75° |
| Leakage Rate |
0% A–AB, <2% B–AB |
| Fluid Type |
Chilled or hot water, up to 60% glycol |
| Fluid Temperature Range |
-18…120°C [0…250°F] |
| Body Pressure Rating |
400 psi |
| Close-Off Pressure |
200 psi |
| Pipe Connection |
NPT female |
| Valve Body Material |
Nickel-plated brass |
| 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 |
7.4 lb |
Information About B350+ARX24-3-T N4
The B350+ARX24-3-T N4 is part of Belimo’s characterized control valve assemblies designed to deliver precise and energy-efficient hydronic control. The valve features differentiated port characteristics to maintain stable common port flow during mixing or diverting operation. Its integrated ARX24-3-T N4 actuator provides non fail-safe operation with simple and robust on/off or floating point control logic. Factory assembly ensures correct alignment between valve and actuator, reduces installation effort, and supports long-term reliability in harsh indoor or outdoor HVAC environments.
Key Features
- Three Way Characterized Valve Design: Supports mixing or diverting applications with optimized port characteristics for stable hydronic performance.
- Non Spring Return Actuator: Powered valve positioning without fail-safe spring action for applications where return on power loss is not required.
- On Off And Floating Point Control: Enables straightforward and reliable control strategies commonly used in hydronic HVAC systems.
- Rugged NEMA 4X Enclosure: IP66/67 rated actuator housing protects against moisture, dust, and corrosion in demanding installations.
- Optimized Flow Performance: Cv 57 capacity with modified B-port flow maintains consistent common port behavior.
- 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 B350+ARX24-3-T N4 delivers the reliability and precision required for dependable three-way hydronic flow control in demanding HVAC applications.
