Description
The Belimo B351 is a heavy-duty 2″ NPT, 3-way ball valve engineered for reliable performance in commercial and industrial chilled water and hot water hydronic systems. Featuring a nickel plated forged brass body with a stainless steel ball and stem, this valve delivers exceptional corrosion resistance and long service life in demanding HVAC applications.
Flow Characteristics
The B351 is designed with dual-port flow characteristics to optimize system control performance:
- A-Port: Equal Percentage flow characteristic for precise, proportional control response
- B-Port: Modified flow characteristic engineered for constant common port flow, maintaining stable system balance
Key Specifications
- Valve Type: Ball Valve, 3-Way
- Pipe Size: 2″ NPT
- Flow Coefficient (Cv): 68
- Body Material: Nickel Plated Forged Brass
- Ball & Stem Material: Stainless Steel
- Maximum Temperature: 250°F
- Application: Chilled Water and Hot Water HVAC Systems
Construction & Design
The forged brass body provides superior structural integrity compared to cast alternatives, while the nickel plating adds a protective barrier against corrosion and scale buildup. The stainless steel ball and stem resist pitting and wear, ensuring consistent sealing performance over the life of the valve. The 3-way configuration allows for mixing or diverting flow, making it ideal for terminal unit coil control, fan coil units, and air handling unit applications.
Applications
- Chilled water coil control in commercial HVAC systems
- Hot water heating coil control (up to 250°F)
- Fan coil unit (FCU) water flow regulation
- Air handling unit (AHU) coil bypass and mixing
- Variable flow hydronic distribution systems
Why Choose the Belimo B351?
Belimo is a globally recognized leader in actuator and valve technology. The B351 is designed to pair seamlessly with Belimo actuators, offering a complete, factory-matched valve and actuator solution. Its robust materials, dual-port flow optimization, and high Cv rating make it a top choice for engineers and contractors specifying reliable hydronic control in commercial buildings.
