B349+AFRB24-SR | Belimo Three Way Characterized Control Valve With Spring Return Actuator 24V
Belimo · Motors & Motion
Description The Belimo B349+AFRB24-SR is a factory-assembled characterized control valve with a spring return actuator designed for precise modulating control of hydronic HVAC systems. It combines a 3-way DN 2 inch valve with a 24 V actuator to deliver accurate flow regulation and reliable fail-safe operation. Technical Specifications Condition New/Never Used Surplus Brand Belimo Category Control Valves Part Number B349+AFRB24-SR Subcategory Characterized Control Valves Valve Size 2 in [50 mm] Valve Type 3-way mixing/diverting Cv Rating 46 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 Flow Characteristic Equal percentage A-port Leakage Rate 0% A–AB, <2% B–AB Pipe Connection NPT female Nominal Voltage AC/DC 24 V Control Signal 2…10 V (4…20 mA with resistor) Power Consumption (Operation) 5.5 W Power Consumption (Rest) 3 W Transformer Sizing 8.5 VA Position Feedback 2…10 V Actuator Rotation 90° Running Time (Motor) 95 s / 90° Running Time (Fail-Safe) <20 s Degree of Protection IP54 / NEMA 2 Weight 10.9 lb Information About B349+AFRB24-SR The B349+AFRB24-SR is part of Belimo’s characterized control valve portfolio engineered to optimize hydronic system efficiency and control accuracy. The valve body is constructed from nickel-plated brass with stainless steel internal components to ensure durability and stable performance under varying pressure and temperature conditions. Its integrated spring return actuator provides proportional control via a 2…10 V signal and ensures automatic return to a defined safety position during power loss. Factory assembly and testing of the valve and actuator reduce installation time while ensuring reliable operation in commercial HVAC applications. Key Features Characterized Three Way Valve Design: Provides precise flow control with equal percentage characteristics on the A-port and optimized B-port flow for stable mixing or diverting operation. Integrated Spring Return Actuator: Ensures automatic fail-safe positioning during power loss to protect equipment and maintain system safety. High Cv Performance: Cv 46 rating supports efficient flow control for medium to large hydronic circuits with minimal pressure loss. Wide Fluid Compatibility: Designed for chilled and hot water systems with glycol concentrations up to 60 percent. Modulating Control Capability: Supports 2…10 V control input with optional 4…20 mA configuration for compatibility with modern building automation systems. Durable Valve Construction: Nickel-plated brass body with stainless steel and PTFE components ensures long service life and low leakage performance. Integrated Position Feedback: Provides a 2…10 V feedback signal for continuous monitoring and closed-loop system control. The B349+AFRB24-SR delivers the reliability and precision required for accurate hydronic flow modulation and dependable fail-safe valve control in HVAC systems.
Brand: Belimo · Category: Motors & Motion
Key features
- Characterized Three Way Valve Design: Provides precise flow control with equal percentage characteristics on the A-port and optimized B-port flow for stable mixing or diverting operation.
- Integrated Spring Return Actuator: Ensures automatic fail-safe positioning during power loss to protect equipment and maintain system safety.
- High Cv Performance: Cv 46 rating supports efficient flow control for medium to large hydronic circuits with minimal pressure loss.
- Wide Fluid Compatibility: Designed for chilled and hot water systems with glycol concentrations up to 60 percent.
- Modulating Control Capability: Supports 2…10 V control input with optional 4…20 mA configuration for compatibility with modern building automation systems.
- Durable Valve Construction: Nickel-plated brass body with stainless steel and PTFE components ensures long service life and low leakage performance.
- Integrated Position Feedback: Provides a 2…10 V feedback signal for continuous monitoring and closed-loop system control.
Specifications
| Manufacturer part number | B349+AFRB24-SR |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | Control Valves |
| Part Number | B349+AFRB24-SR |
| Subcategory | Characterized Control Valves |
| Valve Size | 2 in [50 mm] |
| Valve Type | 3-way mixing/diverting |
| Cv Rating | 46 |
| 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 |
| Flow Characteristic | Equal percentage A-port |
| Leakage Rate | 0% A–AB, <2% B–AB |
| Pipe Connection | NPT female |
| Nominal Voltage | AC/DC 24 V |
| Control Signal | 2…10 V (4…20 mA with resistor) |
| Power Consumption (Operation) | 5.5 W |
| Power Consumption (Rest) | 3 W |
| Transformer Sizing | 8.5 VA |
| Position Feedback | 2…10 V |
| Actuator Rotation | 90° |
| Running Time (Motor) | 95 s / 90° |
| Running Time (Fail-Safe) | <20 s |
| Degree of Protection | IP54 / NEMA 2 |
| Weight | 10.9 lb |
| Product type | Characterized Control Valves |
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