Description
The Belimo B340L+AFRX24-MFT is a factory-assembled three-way ball valve with a spring return actuator designed for precise modulating control in hydronic HVAC systems. It combines a 1.5 inch valve body with a programmable 24 V actuator to provide accurate flow regulation and reliable fail-safe operation.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Belimo |
| Category |
Control Valves |
| Part Number |
B340L+AFRX24-MFT |
| Subcategory |
Ball Valves |
| Valve Size |
1.5 in [40 mm] |
| Valve Type |
3-way changeover / diverting |
| Cv Rating |
57 |
| Flow Characteristic |
Modified linear |
| Flow Pattern |
3-way |
| Controllable Flow Range |
75° |
| Leakage Rate |
0% |
| 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 |
| Nominal Voltage |
AC/DC 24 V |
| Control Signal |
MFT programmable, 2…10 V |
| Power Consumption (Operation) |
7.5 W |
| Power Consumption (Rest) |
3 W |
| Transformer Sizing |
10 VA |
| Position Feedback |
2…10 V |
| Actuator Rotation |
90° |
| Running Time (Motor) |
70…220 s / 90° |
| Running Time (Fail-Safe) |
<20 s @ 20°C |
| Degree of Protection |
IP54 / NEMA 2 |
| Weight |
8.6 lb |
Information About B340L+AFRX24-MFT
The B340L+AFRX24-MFT is part of Belimo’s ball valve and actuator assemblies engineered to deliver stable and energy-efficient hydronic control. The valve features a durable internal design that supports zero leakage performance and consistent flow characteristics in heating and cooling systems. Its integrated AFRX24-MFT spring return actuator uses Belimo MFT technology, allowing flexible configuration of control signals, operating ranges, and response behavior. Factory assembly ensures proper valve-to-actuator alignment, reducing installation time and supporting long-term reliability in commercial HVAC applications.
Key Features
- Three Way Ball Valve Assembly: Provides accurate changeover or diverting control with a modified linear flow characteristic for stable hydronic performance.
- Spring Return Fail-Safe Actuator: Automatically drives the valve to a defined safety position during power loss to protect system operation.
- MFT Programmable Control Technology: Supports configurable control modes including 2…10 V, 4…20 mA, PWM, on/off, and floating point for broad system compatibility.
- High Flow Capacity: Cv 57 rating supports efficient control of medium to large hydronic circuits with minimal pressure drop.
- Zero Leakage Valve Design: Ensures tight shutoff and reliable separation of flow paths during changeover or diverting operation.
- Integrated Position Feedback: Provides a 2…10 V feedback signal for continuous valve position monitoring and closed-loop control.
- Manual Override Capability: Supplied hex crank allows manual positioning during commissioning or maintenance activities.
The B340L+AFRX24-MFT delivers the reliability and precision required for accurate hydronic flow modulation and dependable fail-safe valve control in HVAC systems.
