Overview
The Belimo B251 is a 2-inch 2-way Characterized Control Valve (CCV) engineered for high-performance fluid control in HVAC applications. It ensures stable, equal percentage flow performance across variable hydronic systems.
Features
- Stainless steel ball and stem for robust chemical and thermal resistance
- Tefzel characterized disc for true equal-percentage flow
- Maintenance-free self-cleaning ball assembly
- High close-off capability to resist differential pressure
- Compact footprint for ease of installation
Specifications
- Valve Size: 2 inches [DN 50]
- Flow Coefficient (Cv): 65
- Pattern: 2-way
- Close-off Pressure: 200 psi
- Controllable Flow Range: 75°
- End Fitting: Internal thread (NPT)
Applications
- Chilled and hot water coil control in AHUs
- Variable flow hydronic heating and cooling systems
- Perimeter re-heat loops and fan coil units


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