Belimo B321 Valve
The Belimo B321 is a 3/4-inch 3-way characterized control valve engineered for precision flow control in hydronic systems. This NPT ball valve features a 24 Cv rating and utilizes a nickel-plated forged brass body paired with a stainless steel ball and stem to resist corrosion and scaling in high-demand environments. Designed for chilled or hot water applications, this valve handles media temperatures up to 250°F and is compatible with up to 60% glycol solutions. The A-port provides equal percentage flow characteristics for linear heat output, while the B-port is modified for constant common port flow, ensuring system stability during bypass operations. Integrating this valve with Belimo rotary actuators provides reliable HVAC valve modulation for air handling units and terminal equipment. The blowout-proof stem design and high close-off pressure ratings minimize leakage and bypass, making it a standard choice for contractors focusing on hydronic balancing and energy efficiency.
Key Technical Benefits
- Equal percentage flow characteristic in the A-port ensures stable control loop response.
- Stainless steel trim prevents pitting and ensures long-term seat integrity in varying water chemistries.
- High temperature rating of 250°F allows for versatile use in both heating and cooling circuits.
- Chrome-plated brass or stainless steel ball options provide low operating torque, extending actuator life.
- Maintenance-free design reduces truck rolls and simplifies hydronic system commissioning.
Common Questions
How do I select the correct actuator for the Belimo B321?
The B321 is compatible with LR, AR, and NR series non-spring return actuators, as well as TR, LF, and AF spring return actuators depending on your required torque and fail-safe position.
Can the B321 be used in steam applications?
No, this valve is specifically rated for chilled or hot water and glycol solutions. For steam control, a localized high-pressure globe valve or a steam-rated ball valve must be used.
What is the purpose of the internal characterizing disc?
The Tefzel characterizing disc transforms the inherent quick-opening curve of a ball valve into an equal percentage curve, preventing hunting and temperature fluctuations in the coil.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $174.44
-65%$174.44
$61.05Belimo B321 Valve
The Belimo B321 is a 3/4-inch 3-way characterized control valve engineered for precision flow control in hydronic systems. This NPT ball valve features a 24 Cv rating and utilizes a nickel-plated forged brass body paired with a stainless steel ball and stem to resist corrosion and scaling in high-demand environments. Designed for chilled or hot water applications, this valve handles media temperatures up to 250°F and is compatible with up to 60% glycol solutions. The A-port provides equal percentage flow characteristics for linear heat output, while the B-port is modified for constant common port flow, ensuring system stability during bypass operations. Integrating this valve with Belimo rotary actuators provides reliable HVAC valve modulation for air handling units and terminal equipment. The blowout-proof stem design and high close-off pressure ratings minimize leakage and bypass, making it a standard choice for contractors focusing on hydronic balancing and energy efficiency.
Key Technical Benefits
- Equal percentage flow characteristic in the A-port ensures stable control loop response.
- Stainless steel trim prevents pitting and ensures long-term seat integrity in varying water chemistries.
- High temperature rating of 250°F allows for versatile use in both heating and cooling circuits.
- Chrome-plated brass or stainless steel ball options provide low operating torque, extending actuator life.
- Maintenance-free design reduces truck rolls and simplifies hydronic system commissioning.
Common Questions
How do I select the correct actuator for the Belimo B321?
The B321 is compatible with LR, AR, and NR series non-spring return actuators, as well as TR, LF, and AF spring return actuators depending on your required torque and fail-safe position.
Can the B321 be used in steam applications?
No, this valve is specifically rated for chilled or hot water and glycol solutions. For steam control, a localized high-pressure globe valve or a steam-rated ball valve must be used.
What is the purpose of the internal characterizing disc?
The Tefzel characterizing disc transforms the inherent quick-opening curve of a ball valve into an equal percentage curve, preventing hunting and temperature fluctuations in the coil.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
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Shipping & Returns
Description
The Belimo B321 is a 3/4-inch 3-way characterized control valve engineered for precision flow control in hydronic systems. This NPT ball valve features a 24 Cv rating and utilizes a nickel-plated forged brass body paired with a stainless steel ball and stem to resist corrosion and scaling in high-demand environments. Designed for chilled or hot water applications, this valve handles media temperatures up to 250°F and is compatible with up to 60% glycol solutions. The A-port provides equal percentage flow characteristics for linear heat output, while the B-port is modified for constant common port flow, ensuring system stability during bypass operations. Integrating this valve with Belimo rotary actuators provides reliable HVAC valve modulation for air handling units and terminal equipment. The blowout-proof stem design and high close-off pressure ratings minimize leakage and bypass, making it a standard choice for contractors focusing on hydronic balancing and energy efficiency.
Key Technical Benefits
- Equal percentage flow characteristic in the A-port ensures stable control loop response.
- Stainless steel trim prevents pitting and ensures long-term seat integrity in varying water chemistries.
- High temperature rating of 250°F allows for versatile use in both heating and cooling circuits.
- Chrome-plated brass or stainless steel ball options provide low operating torque, extending actuator life.
- Maintenance-free design reduces truck rolls and simplifies hydronic system commissioning.
Common Questions
How do I select the correct actuator for the Belimo B321?
The B321 is compatible with LR, AR, and NR series non-spring return actuators, as well as TR, LF, and AF spring return actuators depending on your required torque and fail-safe position.
Can the B321 be used in steam applications?
No, this valve is specifically rated for chilled or hot water and glycol solutions. For steam control, a localized high-pressure globe valve or a steam-rated ball valve must be used.
What is the purpose of the internal characterizing disc?
The Tefzel characterizing disc transforms the inherent quick-opening curve of a ball valve into an equal percentage curve, preventing hunting and temperature fluctuations in the coil.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
