Description
Belimo B261 Two-Way Ball Valve Overview
The Belimo B261 is a heavy-duty, two-way characterized control ball valve engineered for reliable performance in demanding chilled water and hot water HVAC applications. With a 2-1/2″ NPT connection and a generous 60 Cv flow coefficient, this valve delivers precise, equal percentage flow control across a wide range of commercial and industrial hydronic systems.
Premium Construction
Built to last in tough mechanical room environments, the B261 features a nickel-plated forged brass body paired with a stainless steel ball and stem. This combination provides outstanding corrosion resistance, long service life, and dependable sealing integrity — even in glycol-treated systems.
Key Specifications
- SKU / Model: B261
- Brand: Belimo
- Connection Type: NPT (National Pipe Thread)
- Pipe Size: 2-1/2″
- Flow Coefficient (Cv): 60
- Valve Configuration: 2-Way
- Flow Characteristic: Equal Percentage
- Body Material: Nickel-Plated Forged Brass
- Ball and Stem Material: Stainless Steel
- Maximum Temperature Rating: 212°F (100°C)
- Glycol Compatibility: Up to 60% Glycol Solution
Application Suitability
- Chilled water systems
- Hot water heating systems (up to 212°F maximum)
- Glycol-treated hydronic loops (up to 60% glycol concentration)
- Fan coil units, air handling units, and terminal equipment
- Commercial and industrial building automation systems
Why Choose the Belimo B261?
Belimo is a globally recognized leader in HVAC valve and actuator technology. The B261 is designed to pair seamlessly with Belimo actuators, enabling precise modulating control for energy-efficient building automation. The equal percentage flow characteristic ensures stable, responsive control across the full range of valve travel — ideal for variable-flow hydronic systems where tight temperature regulation is critical.
Installation Notes
The B261 is designed for use with a compatible Belimo actuator (sold separately). The NPT threaded connections simplify installation into standard piping systems. Always verify system pressure and temperature ratings against your specific application requirements before installation.
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