Belimo B349 Valve

The Belimo B349 is a high-performance 2-inch NPT 3-way ball valve designed for precise mixing or diverting in commercial HVAC and hydronic systems. This 46 Cv valve features an A-port equal percentage flow characteristic and a B-port modified for constant common port flow, ensuring stable control and preventing pressure surges during modulation. Engineered with a nickel-plated forged brass body and stainless steel ball and stem, the B349 provides superior corrosion resistance and durability in demanding chilled or hot water applications. Rated for temperatures up to 250°F and 60% glycol solutions, this 400 psi rated valve is compatible with Belimo ARB, ARX, and AF series actuators. By utilizing a chrome-plated brass or stainless steel trim, it minimizes torque requirements and extends the service life of the HVAC control valve assembly.

Key Benefits for Contractors:

• Precise Flow Control: The equal percentage characteristic in the A-port allows for linear heat output, optimizing system efficiency.
• Zero Leakage: Tight shut-off prevents energy loss and Ghost Flow in complex hydronic circuits.
• High Durability: Stainless steel trim resists scaling and wear better than standard brass components in high-temperature 250°F systems.
• Installation Versatility: Suitable for both mixing and diverting configurations without the need for specialized piping modifications.

Common Questions:

Can the Belimo B349 be used with steam?
No, this valve is specifically designed for chilled water, hot water, and glycol applications. It is not rated for steam use.

Which actuators are compatible with this 2-inch valve?
The Belimo B349 typically pairs with ARB24, ARX24, and AF series actuators depending on the required torque and fail-safe requirements.

Is this valve suitable for high-concentration glycol systems?
Yes, the internal seals and materials are rated for glycol solutions up to 60%, making it ideal for freeze protection in outdoor hydronic loops.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.