Belimo B329 Ball Valve

The Belimo B329 is a high-performance 1 1/4 inch 3-way characterized control valve designed for precise flow control in demanding hydronic systems. Engineered with a 10 Cv flow coefficient, this valve features an A-port equal percentage characteristic for linear heat output and a modified B-port to ensure constant common port flow, making it ideal for chilled or hot water applications up to 250°F. The nickel-plated forged brass body housing a 304 stainless steel ball and stem provides superior durability and resistance to scaling. This NPT-threaded valve is compatible with glycol solutions up to 60% and requires low torque for actuation, ensuring reliable performance in both mixing and diverting configurations. Professionals frequently specify the B329 for AHU and fan coil units where zero leakage and accurate modulation are critical for system efficiency and balancing.

• Stainless Steel Trim: The 304 stainless steel ball and stem prevent corrosion and ensure longevity in high-temperature HVAC hydronic systems.
• Equal Percentage Flow: Optimized A-port geometry provides precise modulating control valve performance for heat exchangers.
• Blow-out Proof Stem: Enhanced safety design featuring EPDM O-rings for high-pressure reliability and reduced maintenance.
• Versatile Media Compatibility: Rated for temperatures up to 250°F and high glycol concentrations, suitable for commercial HVAC applications.
• Zero Leakage: Tight shut-off rating prevents energy loss and ghost flows in the bypass loop.

What is the maximum pressure rating for the Belimo B329?
This 1.25 inch NPT ball valve typically features a body pressure rating of 400 psi and a close-off pressure of 200 psi, ensuring stability in high-rise piping networks.

Can the B329 be used for steam applications?
No, the Belimo B329 is specifically engineered for water and glycol-based systems. For steam requirements, a different series of high-temperature valves must be utilized.

Which actuators are compatible with this 3-way valve?
The B329 is designed to pair with Belimo LR, AR, and NR series actuators. Use a non-spring return or spring return actuator depending on your fail-safe requirements.

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.