The Belimo B211B is a professional-grade 1/2-inch 2-way characterized control valve engineered for precision in hydronic systems. Designed for both chilled and hot water applications, this valve features a nickel-plated forged brass body and a chrome-plated brass ball, ensuring long-term durability in demanding HVAC environments. With a 1.9 Cv rating and a specialized Tefzel characterized disc, the B211B maintains an equal percentage flow characteristic, providing the linear thermal performance necessary to prevent control loop hunting and optimize heat transfer in air handling units and fan coil systems. It supports media temperatures from 0°F to 250°F and is compatible with up to 60% glycol solutions, making it a versatile choice for VAV box reheat coils and bypass loops. The maintenance-free design includes a 600 psi body pressure rating and a 200 psi close-off pressure, paired with EPDM O-rings and PTFE seats for a zero-leakage (0% for A to AB) seal. Key Benefits: Equal percentage flow provides stable control and eliminates the need for pipe reductions in most field applications. Forged brass construction with nickel plating offers superior corrosion resistance compared to standard valve bodies. Tefzel characterizing disc ensures high-rangeability and precise modulation for better energy efficiency. Blow-out proof stem design with EPDM lubricated seals ensures reliable operation under high static pressures. Compatible with TR, LRB, and TFRB actuators, offering flexibility for non-fail safe or spring-return configurations. Common Questions: Can the B211B handle high-pressure hydronic systems? Yes, this valve is rated for a 600 psi body pressure and can manage a maximum close-off pressure of 200 psi, making it suitable for high-rise or large-scale commercial loops. Is this valve suitable for steam applications? No, the B211B is specifically designed for chilled or hot water and glycol solutions up to 60%. For steam service, a different trim material is required. What is the proper flow direction for installation? In a 2-way configuration, the valve should be installed with the characterizing disc upstream to ensure the intended flow characteristic and prevent turbulence. 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.
