B338+AFRB24-SR | Belimo 1.5 Inch Three Way Characterized Control Valve With Spring Return Actuator
Belimo · Motors & Motion
Description The Belimo B338+AFRB24-SR is a 1.5-inch, 3-way characterized control valve assembly with a factory-fitted 24 V spring return modulating actuator. It provides accurate mixing or diverting flow control with a Cv of 19 for hydronic HVAC applications requiring dependable fail-safe operation. Technical Specifications Condition New/Never Used Surplus Brand Belimo Category Control Valves Part Number B338+AFRB24-SR Subcategory Characterized Control Valves Valve Type Characterized Control Valve (CCV) Valve Size 1.5 in (DN 40) Flow Pattern 3-way mixing / diverting Cv Rating 19 Flow Characteristic A-port equal percentage, B-port modified Leakage Rate 0% A–AB, <2% B–AB Body Pressure Rating 400 psi Close-Off Pressure 200 psi Pipe Connection Female NPT threaded Fluid Compatibility Chilled or hot water, up to 60% glycol Fluid Temperature Range 0…250°F (-18…120°C) Valve Body Material Nickel-plated brass Ball Material Stainless steel Seat Material PTFE Actuator Type Spring return, modulating Nominal Voltage AC/DC 24 V Control Signal 2…10 V (4…20 mA with resistor) Power Consumption (Running) 5.5 W Power Consumption (Rest) 3 W Running Time 95 s / 90° Fail-Safe Running Time <20 s Degree of Protection IP54 / NEMA 2 Weight 9.1 lb Information About B338+AFRB24-SR The B338+AFRB24-SR is part of Belimo’s characterized control valve family engineered to deliver stable and predictable flow control in variable-volume hydronic systems. The 3-way valve design supports both mixing and diverting applications, with optimized port geometry to maintain consistent common port flow. Its factory-installed AFRB24-SR actuator operates on AC/DC 24 V and provides precise modulating control with automatic spring return positioning during power loss. Built with corrosion-resistant materials and maintenance-free construction, the assembly is designed for long-term reliability in commercial HVAC environments. Key Features Three Way Mixing And Diverting Capability: Supports flexible hydronic system design with accurate control of combined or diverted flow paths. Characterized Flow Performance: Equal percentage A-port and modified B-port characteristics ensure smooth modulation and stable temperature control. Integrated Spring Return Actuator: Automatically moves the valve to a defined safety position upon loss of power to protect system operation. Precise Modulating Control Input: Accepts 2…10 V control signals with optional 4…20 mA compatibility for broad controller integration. Durable Valve Construction: Nickel-plated brass body with stainless steel internal components provides corrosion resistance and long service life. Tight Shutoff Behavior: Zero leakage at A–AB and minimal leakage at B–AB support effective flow isolation when required. Service-Friendly Design: Manual override and mechanical position indication simplify commissioning, testing, and maintenance. The B338+AFRB24-SR delivers the reliability and precision required for accurate three-way hydronic flow control with fail-safe performance in commercial HVAC systems.
Brand: Belimo · Category: Motors & Motion
Key features
- Three Way Mixing And Diverting Capability: Supports flexible hydronic system design with accurate control of combined or diverted flow paths.
- Characterized Flow Performance: Equal percentage A-port and modified B-port characteristics ensure smooth modulation and stable temperature control.
- Integrated Spring Return Actuator: Automatically moves the valve to a defined safety position upon loss of power to protect system operation.
- Precise Modulating Control Input: Accepts 2…10 V control signals with optional 4…20 mA compatibility for broad controller integration.
- Durable Valve Construction: Nickel-plated brass body with stainless steel internal components provides corrosion resistance and long service life.
- Tight Shutoff Behavior: Zero leakage at A–AB and minimal leakage at B–AB support effective flow isolation when required.
- Service-Friendly Design: Manual override and mechanical position indication simplify commissioning, testing, and maintenance.
Specifications
| Manufacturer part number | B338+AFRB24-SR |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | Belimo |
| Category | Control Valves |
| Part Number | B338+AFRB24-SR |
| Subcategory | Characterized Control Valves |
| Valve Type | Characterized Control Valve (CCV) |
| Valve Size | 1.5 in (DN 40) |
| Flow Pattern | 3-way mixing / diverting |
| Cv Rating | 19 |
| Flow Characteristic | A-port equal percentage, B-port modified |
| Leakage Rate | 0% A–AB, <2% B–AB |
| Body Pressure Rating | 400 psi |
| Close-Off Pressure | 200 psi |
| Pipe Connection | Female NPT threaded |
| Fluid Compatibility | Chilled or hot water, up to 60% glycol |
| Fluid Temperature Range | 0…250°F (-18…120°C) |
| Valve Body Material | Nickel-plated brass |
| Ball Material | Stainless steel |
| Seat Material | PTFE |
| Actuator Type | Spring return, modulating |
| Nominal Voltage | AC/DC 24 V |
| Control Signal | 2…10 V (4…20 mA with resistor) |
| Power Consumption (Running) | 5.5 W |
| Power Consumption (Rest) | 3 W |
| Running Time | 95 s / 90° |
| Fail-Safe Running Time | <20 s |
| Degree of Protection | IP54 / NEMA 2 |
| Weight | 9.1 lb |
| Product type | Characterized Control Valves |
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