Belimo B250+AFRBUP Valve Assembly

The Belimo B250+AFRBUP is a heavy-duty 2-way characterized control valve (CCV) assembly designed for precise hydronic flow control in demanding HVAC applications. This assembly combines a 2-inch NPT valve body with a high-torque 180 in-lb spring return actuator, ensuring reliable fail-safe operation during power loss. Featuring stainless steel trim and a specialized characterizing disc, the B250 provides an equal percentage flow characteristic that eliminates the control loop "hunting" common in standard ball valves. This makes it an ideal solution for air handling units (AHUs) and large heating or cooling coils where maintaining tight temperature tolerances is critical.

Built for versatility and longevity, the AFRBUP actuator utilizes a universal power supply, accepting 24 to 240 VAC without the need for additional transformers. The valve body is rated for up to 400 psi and can handle media temperatures from 0°F to 250°F, making it suitable for both chilled water and hot water systems with up to 60% glycol. With a high Cv of 57, this 2-inch valve assembly delivers the flow capacity required for large-scale commercial retrofits and new installations alike.

• Precise Flow Control: The integrated characterizing disc provides a true equal percentage curve, protecting the actuator from constant repositioning and extending the life of the HVAC valve assembly.
• Fail-Safe Reliability: The mechanical spring return ensures the valve returns to its safe position immediately upon power failure, protecting critical equipment.
• Universal Compatibility: The multi-voltage actuator (24-240V) simplifies stock and installation requirements for contractors working across different site power standards.
• Superior Durability: Stainless steel ball and stem construction resists scaling and corrosion, maintaining a zero-leakage seal (Port A to AB) over years of high-cycle operation.

Can the AFRBUP actuator be used in air plenums?
Yes, the AFRBUP is UL 2043 compliant and suitable for use in air plenums per NEC Section 300.22(C).

What is the maximum close-off pressure for the B250 valve?
This 2-inch NPT ball valve assembly is rated for a 200 psi close-off pressure, ensuring tight shut-off in high-head hydronic systems.

Does this assembly support proportional control?
The AFRBUP model is an On/Off actuator. For modulating or proportional control (2-10VDC), an "ARX" or "AFX" series actuator would be required.

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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.