Overview
The Belimo B309B is a 1/2-inch 3-way characterized ball valve featuring a 0.8 Cv rating and chrome-plated brass ball trim, engineered for cost-effective hydronic flow regulation.
Features
- Characterized flow control disc ensures stable loop performance
- Nickel-plated forged brass body with chrome-plated brass ball
- High close-off capability with zero leakage on A-port
- Suitable for chilled/hot water and 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
- Material: Nickel-plated forged brass, Chrome-plated brass ball
Applications
- Commercial HVAC hydronic heating and cooling systems
- Fan coil unit water temperature control
- 3-way mixing or diverting water loops



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