Description
The Belimo B278 is a heavy-duty 3″ NPT, 2-way ball valve engineered for demanding chilled water and hot water HVAC applications. Built with a nickel-plated forged brass body and a stainless steel ball and stem, this valve delivers outstanding durability, corrosion resistance, and long service life in commercial and industrial hydronic systems.
Key Features
- 3″ NPT end connections for straightforward installation in standard piping systems
- 2-way configuration for precise on/off or modulating flow control
- 130 Cv flow coefficient for high-capacity water flow in large hydronic systems
- Equal percentage flow characteristic for accurate, stable modulating control across the full valve stroke
- Nickel-plated forged brass body for superior corrosion resistance and structural integrity
- Stainless steel ball and stem for long-lasting, reliable performance in wet environments
- Rated for chilled water and hot water service up to 212°F (100°C) maximum
- Compatible with glycol solutions up to 60% concentration
Applications
- Commercial and industrial chilled water systems
- Hot water heating and hydronic distribution systems
- Air handling units (AHUs) and fan coil units (FCUs)
- Building automation and energy management systems
- Glycol-based freeze protection systems
Product Specifications
- Brand: Belimo
- Model / SKU: B278
- Valve Type: Ball Valve
- Pipe Size: 3″ (DN80)
- Connection Type: NPT (National Pipe Thread)
- Flow Configuration: 2-Way
- Flow Characteristic: Equal Percentage
- Cv Rating: 130
- Body Material: Nickel-Plated Forged Brass
- Ball and Stem Material: Stainless Steel
- Maximum Fluid Temperature: 212°F (100°C)
- Glycol Compatibility: Up to 60% glycol solution
- Media: Chilled Water, Hot Water
Why Choose the Belimo B278?
Belimo is a globally recognized leader in HVAC valve and actuator technology, trusted by engineers and contractors for precision, reliability, and energy efficiency. The B278 is designed to be paired with Belimo actuators, providing a complete, factory-matched valve-actuator assembly that simplifies installation and ensures optimal system performance. Its equal percentage flow characteristic makes it ideal for modulating applications where precise control is critical to system efficiency and comfort.
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