Description
The Belimo B253+ARX24-3-T N4 is a factory-assembled 2-way characterized control valve designed for precise floating control in hydronic HVAC systems. Featuring a non-spring return actuator with NEMA 4X protection, it supports reliable operation in demanding indoor and outdoor environments.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Belimo |
| Category |
Control Valves |
| Part Number |
B253+ARX24-3-T N4 |
| Subcategory |
Characterized Control Valves |
| Valve Type |
Characterized Control Valve (CCV) |
| Valve Size |
2 in (DN 50) |
| Flow Pattern |
2-way |
| Flow Coefficient |
Cv 120 |
| Flow Characteristic |
Equal percentage |
| Controllable Flow Range |
75° |
| Leakage Rate |
0% for A–AB |
| Body Pressure Rating |
400 psi |
| Close-Off Pressure |
200 psi |
| Fluid Compatibility |
Chilled water, hot water, up to 60% glycol |
| Fluid Temperature Range |
0…250°F (-18…120°C) |
| Pipe Connection |
NPT female |
| Valve Body Material |
Nickel-plated brass |
| Ball Material |
Stainless steel |
| Stem Material |
Stainless steel |
| Seat Material |
PTFE |
| Actuator Type |
Non spring return |
| Control Type |
Floating point |
| Nominal Voltage |
AC/DC 24 V |
| Power Consumption (Operation) |
2.5 W |
| Power Consumption (Rest) |
0.5 W |
| Transformer Sizing |
5.5 VA |
| Electrical Connection |
Terminal blocks |
| Angle of Rotation |
90°, adjustable |
| Running Time |
90 s / 90° (selectable 90 or 150 s) |
| Protection Rating |
IP66/67, NEMA 4X |
| Weight |
7.4 lb |
Information About B253+ARX24-3-T N4
The B253+ARX24-3-T N4 is part of Belimo’s high-capacity CCV platform engineered for stable and energy-efficient hydronic control. Its characterized valve design delivers a predictable equal percentage response, improving control accuracy across varying load conditions. The nickel-plated brass body and stainless steel internals provide durability and corrosion resistance for long-term service. Factory-fitted with the ARX24 actuator in a NEMA 4X enclosure, this assembly supports reliable floating control in harsh or washdown-prone environments.
Key Features
- High Cv 120 Flow Capacity: Supports efficient control of large hydronic flows in 2-inch piping with stable pressure characteristics.
- Characterized Control Valve Geometry: Equal percentage response improves controllability and system stability over a wide operating range.
- Integrated Valve and Actuator Assembly: Factory mounting ensures precise alignment, reduced installation time, and consistent performance.
- Floating Point Control Operation: Enables accurate incremental positioning using open/close signals from building automation systems.
- Non Spring Return Actuation: Designed for continuous powered positioning where fail-safe spring action is not required.
- NEMA 4X / IP66-67 Protection: Sealed actuator housing supports outdoor installation and resistance to moisture, dust, and washdown.
- Manual Override Under Cover: Allows controlled manual positioning during commissioning or maintenance without electrical power.
The B253+ARX24-3-T N4 delivers the reliability and precision required for high-capacity floating control in commercial HVAC hydronic systems.
