Description
The Belimo B308 is a precision-engineered 3-way ball valve designed for reliable flow control in chilled and hot water HVAC hydronic systems. Built with a nickel-plated forged brass body and a stainless steel ball and stem, this valve delivers exceptional durability and corrosion resistance in demanding commercial and industrial applications.
Flow Characteristics
The B308 features a dual-port flow design optimized for balanced system performance:
- A-Port: Equal Percentage flow characteristic for precise, proportional control across the full stroke range
- B-Port: Modified flow characteristic engineered for constant common port flow, ensuring stable system pressure and consistent coil performance
Key Specifications
- SKU / Model: B308
- Valve Type: 3-Way Ball Valve
- Pipe Size: 1/2″ NPT
- Flow Coefficient (Cv): 0.46
- Body Material: Nickel Plated Forged Brass
- Ball and Stem Material: Stainless Steel
- Maximum Temperature Rating: 250°F
- Connection Type: NPT (National Pipe Thread)
- Application: Chilled Water and Hot Water Systems
Design & Construction
The nickel-plated forged brass body provides superior strength and resistance to corrosion, while the stainless steel ball and stem ensure long service life even under continuous cycling. The 3-way configuration allows for mixing or diverting service, making it highly versatile for fan coil units, air handling units, and other hydronic terminal equipment.
Applications
- Chilled water coil control in commercial HVAC systems
- Hot water heating coil applications up to 250°F
- Fan coil units and air handling units
- Hydronic mixing and diverting service
- Building automation and direct digital control (DDC) systems
Why Choose the Belimo B308?
Belimo is a globally recognized leader in HVAC actuator and valve technology. The B308 valve body is designed to pair seamlessly with Belimo’s full line of rotary actuators, providing a complete, factory-matched valve and actuator assembly. The equal percentage A-port characteristic enables fine-tuned modulating control, while the modified B-port maintains consistent flow at the common port — a critical feature for maintaining coil performance and system efficiency.
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