The Belimo B311 is a precision-engineered 3-way ball valve designed for reliable flow control in chilled and hot water HVAC hydronic systems. Featuring a nickel-plated forged brass body paired with a stainless steel ball and stem, this valve delivers exceptional corrosion resistance and long service life in demanding building automation and hydronic applications.
Flow Characteristics
- A-port: Equal percentage flow characteristic for precise, stable modulating control
- B-port: Modified flow characteristic engineered for constant common port flow, ensuring consistent system performance across varying load conditions
Key Specifications
- Valve Type: 3-Way Ball Valve
- Pipe Size: 1/2″ NPT
- Flow Coefficient (Cv): 1.9
- Body Material: Nickel Plated Forged Brass
- Ball & Stem Material: Stainless Steel
- Maximum Temperature: 250°F
- Connection Type: NPT (National Pipe Thread)
- Application: Chilled Water and Hot Water Systems
Design & Application Benefits
- Nickel-plated forged brass body provides superior durability and resistance to corrosion in both chilled and hot water service
- Stainless steel ball and stem ensure long-term sealing integrity and smooth operation over thousands of cycles
- 3-way configuration supports mixing or diverting service in hydronic systems, fan coil units, and air handling units
- Equal percentage A-port characteristic allows for accurate proportional control when paired with a compatible Belimo actuator
- Modified B-port flow characteristic maintains a near-constant flow at the common port, reducing system pressure fluctuations
- 250°F maximum temperature rating makes it suitable for both chilled water cooling and hot water heating applications
- Designed to pair with Belimo’s full line of rotary actuators for complete valve-actuator assembly solutions
Ideal For
- Commercial HVAC hydronic heating and cooling systems
- Fan coil unit (FCU) control
- Air handling unit (AHU) coil control
- Building automation and direct digital control (DDC) systems
- Chilled water and hot water distribution circuits
