Description
The Belimo B321 is a high-performance 3-way ball valve engineered for demanding chilled water and hot water HVAC hydronic applications. Built with a nickel plated forged brass body and a stainless steel ball and stem, this valve delivers exceptional durability and corrosion resistance in both heating and cooling systems.
Flow Characteristics
The B321 features a dual-port flow design optimized for precise system control:
- A-port: Equal Percentage flow characteristic for accurate, proportional flow modulation
- B-port: Modified flow characteristic engineered to maintain constant common port flow, ensuring system balance and stability
Key Specifications
- Valve Type: 3-Way Ball Valve
- Connection Size: 3/4″ NPT
- Flow Coefficient (Cv): 24
- Body Material: Nickel Plated Forged Brass
- Ball and Stem Material: Stainless Steel
- Maximum Temperature Rating: 250°F
- Compatible Media: Chilled Water and Hot Water
Design & Construction Highlights
- Nickel plated forged brass body resists corrosion and withstands high-cycle operation
- Stainless steel ball and stem provide long service life and reliable shutoff
- 3-way configuration supports mixing or diverting applications in hydronic systems
- Equal percentage A-port characteristic delivers fine control across the full stroke range
- Modified B-port flow profile maintains consistent flow at the common port for improved system performance
Applications
- Chilled water coil control in air handling units and fan coil units
- Hot water heating coil control
- Commercial and industrial hydronic HVAC systems
- Mixing and diverting service in 2-pipe and 4-pipe systems
The Belimo B321 is designed to pair with Belimo actuators for complete valve and actuator assembly solutions, making it an ideal choice for building automation and energy management systems requiring precise flow control.
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