The Belimo B331 is a high-performance 1 1/4 inch NPT 3-way characterized control valve engineered for precise flow regulation in demanding hydronic systems. Featuring a 25 Cv rating, this valve utilizes an equal percentage flow characteristic on the A-port and a modified linear flow on the B-port to ensure constant common port flow, making it ideal for mixing or diverting applications. The nickel-plated forged brass body housing a 316 stainless steel ball and stem provides superior durability against corrosion and pitting. Rated for chilled or hot water systems up to 250°F and capable of handling up to 60% glycol solutions, the B331 is a staple for HVAC mechanical contractors seeking reliable hydronic flow control. This Belimo CCV (Characterized Control Valve) eliminates the need for balancing valves in many configurations, reducing overall system pressure drops and improving pump efficiency across the loop. Key Benefits: Precise Modulation: Specialized disc design ensures equal percentage flow for stable temperature control. Reduced Wear: The stainless steel ball and stem prevent buildup and leak-through in high-cycle applications. System Versatility: High close-off pressure ratings ensure performance in high-rise and high-head pressure environments. Blow-out Proof Stem: Internal EPDM O-rings provide a maintenance-free seal for the life of the valve. Common Questions: What actuators are compatible with the Belimo B331? The B331 is designed to work seamlessly with Belimo LR, ARB, and NR series actuators, depending on your torque and fail-safe requirements. Can this valve be used for steam applications? No, the B331 is rated specifically for chilled or hot water and glycol solutions up to 250°F; it is not intended for steam service. Is this valve suitable for potable water? No, these characterised control valves are engineered for closed-loop HVAC systems rather than domestic water applications. 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.
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