Description
The Belimo B280+ARB24-3 is a 3-inch, 2-way characterized control valve assembly designed for accurate flow control in hydronic HVAC systems. It combines a high-capacity brass ball valve with a non spring return floating point actuator operating on AC/DC 24 V.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Belimo |
| Category |
Control Valves |
| Part Number |
B280+ARB24-3 |
| Subcategory |
Characterized Control Valves |
| Valve Type |
Characterized Control Valve (CCV) |
| Valve Size |
3 in (DN 80) |
| Flow Pattern |
2-way |
| Cv Rating |
170 |
| Flow Characteristic |
Equal percentage |
| Body Pressure Rating |
400 psi |
| Close-Off Pressure |
100 psi |
| Leakage Rate |
0% for A–AB |
| Pipe Connection |
Female NPT |
| Controllable Flow Range |
75° |
| Fluid Compatibility |
Chilled or hot water, up to 60% glycol |
| Fluid Temperature Range |
0…212°F (-18…100°C) |
| Valve Body Material |
Nickel-plated brass |
| Ball Material |
Stainless steel |
| Seat Material |
PTFE |
| Stem Material |
Stainless steel |
| Actuator Type |
Non spring return |
| Control Mode |
On/Off, Floating point |
| Nominal Voltage |
AC/DC 24 V |
| Power Consumption (Running) |
2.5 W |
| Power Consumption (Rest) |
0.5 W |
| Running Time |
90 s / 90° |
| Degree of Protection |
IP54 / NEMA 2 |
| Weight |
11.2 lb |
Information About B280+ARB24-3
The B280+ARB24-3 is part of Belimo’s characterized control valve range developed to provide stable and repeatable flow control in medium to large hydronic circuits. The valve uses a full-flow stainless steel ball and equal percentage control characteristic to maintain consistent regulation across varying load conditions. Its factory-mounted ARB24-3 actuator supports floating point control and non fail-safe operation, ensuring reliable positioning during normal system operation. Built for maintenance-free service, this assembly integrates durable materials with precise actuator control for long-term HVAC performance.
Key Features
- High Capacity Two Way Valve Design: Cv 170 rating supports effective control of large water volumes in distribution piping.
- Equal Percentage Flow Characteristic: Provides smooth and predictable modulation across the valve’s operating range.
- Non Spring Return Floating Actuator: Supports floating point and on/off control while maintaining last position on power loss.
- Compact Brass Valve Construction: Nickel-plated brass body with stainless steel trim ensures corrosion resistance and durability.
- Low Power Consumption: Efficient 24 V actuator design minimizes electrical load on control transformers.
- Service-Friendly Operation: Manual override and mechanical position indication simplify commissioning and maintenance tasks.
- Proven HVAC Compatibility: Rated for chilled and hot water systems with glycol mixtures up to 60%.
The B280+ARB24-3 delivers the reliability and precision required for accurate hydronic flow control in commercial HVAC applications.
