Description
Overview
The Belimo B251 is a high-performance 2-inch NPT two-way ball valve engineered for demanding hydronic HVAC applications. Featuring an equal percentage flow characteristic, it delivers precise modulating control over chilled water and hot water systems. The nickel-plated forged brass body paired with a stainless steel ball and stem ensures long-lasting corrosion resistance and reliable operation across a wide range of system conditions.
Key Features
- 2-inch NPT end connections for straightforward installation into standard piping systems
- 65 Cv flow coefficient for high-capacity water flow management
- 2-way valve configuration for on/off or modulating control
- Equal percentage flow characteristic for precise, stable control response
- Nickel-plated forged brass body for superior strength and corrosion resistance
- Stainless steel ball and stem for durability and long service life
- Rated for chilled water and hot water applications up to 212°F (100°C) maximum
- Compatible with glycol solutions up to 60% concentration
Specifications
- SKU: B251
- Brand: Belimo
- Valve Type: Ball Valve
- Pipe Size: 2 inch
- Connection Type: NPT (National Pipe Thread)
- Flow Coefficient (Cv): 65
- Valve Configuration: 2-Way
- Flow Characteristic: Equal Percentage
- Body Material: Nickel-Plated Forged Brass
- Ball and Stem Material: Stainless Steel
- Maximum Temperature: 212°F (100°C)
- Glycol Compatibility: Up to 60% glycol solution
- Application: Chilled Water and Hot Water HVAC Systems
Application
The Belimo B251 is ideal for use in commercial and industrial HVAC hydronic systems, including air handling units, fan coil units, heat exchangers, and chiller/boiler plant piping. Its compatibility with glycol solutions makes it well-suited for freeze-protection systems and closed-loop hydronic circuits. Designed to be paired with Belimo actuators for complete valve-actuator assembly solutions.
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