Overview
The Belimo B309 is a 1/2-inch, 3-way characterized control ball valve with a 0.8 Cv rating, designed for precise mixing or diverting in HVAC hydronic loops. It features stainless steel trim for long operational durability.
Features
- Equal percentage flow profile on A-port and modified flow on B-port
- Forged brass body with corrosion-resistant stainless steel ball and stem
- Zero leakage rating on A-port for energy efficiency
- Compatible with up to 60% glycol solutions
Specifications
- Valve Size: 1/2″ NPT
- Pattern: 3-way
- Flow Coefficient (Cv): 0.8
- Body Pressure Rating: 600 psi
- Fluid Temperature Range: Up to 250°F (120°C)
- Material: Brass body, Stainless Steel ball and stem
Applications
- Chilled and hot water coil control in HVAC hydronic systems
- 3-way mixing and diverting applications in fan coils and air handlers
- Hydronic loops using water-glycol mixture solutions



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