Description
Belimo B347 — 2″ NPT 3-Way Ball Valve for Chilled & Hot Water Systems
The Belimo B347 is a precision-engineered 3-way ball valve designed for demanding chilled and hot water HVAC applications. With a nickel-plated forged brass body and stainless steel ball and stem, this valve delivers exceptional durability and corrosion resistance in both heating and cooling hydronic systems. Its robust construction and carefully engineered flow characteristics make it a go-to choice for commercial HVAC contractors and building automation professionals.
Key Specifications
- Valve Type: Ball Valve, 3-Way
- Size: 2″ NPT
- Flow Coefficient (Cv): 29
- Port Configuration: A-port — Equal Percentage Flow; B-port — Modified for Constant Common Port Flow
- Body Material: Nickel-Plated Forged Brass
- Ball & Stem Material: Stainless Steel
- Maximum Temperature Rating: 250°F
- Applications: Chilled Water and Hot Water Systems
Flow Characteristics
The B347 features a dual-port flow design engineered for precise hydronic control. The A-port delivers an equal percentage flow characteristic, providing smooth, predictable modulation across the full stroke range — ideal for variable flow control in AHUs and fan coil units. The B-port is modified to maintain constant common port flow, ensuring stable system performance and minimizing pressure fluctuations in 3-way mixing or diverting configurations.
Construction & Durability
- Nickel-plated forged brass body resists corrosion and withstands harsh hydronic environments
- Stainless steel ball and stem provide long service life and tight shutoff
- Rated for temperatures up to 250°F — suitable for both chilled and high-temperature hot water applications
- NPT threaded connections for straightforward field installation
Ideal Applications
- Commercial and industrial hydronic heating and cooling systems
- Air handling units (AHUs) and fan coil units (FCUs)
- Building automation and DDC control systems
- 3-way mixing and diverting valve configurations
- Chilled water and hot water coil control
Why Choose Belimo
Belimo is a globally recognized leader in HVAC actuator and valve technology, trusted by mechanical contractors and building automation engineers worldwide. The B347 is designed to pair seamlessly with Belimo’s full line of actuators, offering a complete valve-and-actuator solution for precise hydronic control. Built for reliability, the B347 delivers consistent performance over years of operation in commercial HVAC systems.
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