Belimo B251 Valve
The Belimo B251 is a 2-inch 2-way Characterized Control Valve (CCV) designed for high-performance hydronic control in HVAC systems. Featuring a 65 Cv rating and NPT female threaded connections, this valve is engineered with a nickel-plated forged brass body and robust stainless steel ball and stem to withstand demanding environments. Designed specifically for chilled or hot water applications, it manages fluid temperatures up to 250°F and glycol solutions up to 60%. The equal percentage flow characteristic ensures linear heat transfer and prevents control loop hunting in air handling units, fan coils, and unit ventilators. With a 400 psi body pressure rating and a 200 psi close-off capability, the B251 provides zero leakage (Port A to AB) and self-cleaning operation to reduce maintenance in variable flow hydronic systems.
Key Benefits:- Optimized Control: The equal percentage flow curve provides precise modulation for heating and cooling coils.
- Durable Construction: Stainless steel ball and stem offer superior resistance to corrosion and scaling compared to chrome-plated alternatives.
- High Capacity: A 65 Cv rating supports significant flow rates for large 2-inch NPT piping systems.
- Leak-Free Performance: Technical EPDM O-rings and PTFE seats ensure a tight 0% leakage rate at shut-off.
What actuators are compatible with the B251?
This valve is designed to pair with Belimo fail-safe and non-fail-safe actuators, including the ARB, ARX, and AFRB series, depending on the required torque and control signal (On/Off, Floating, or Proportional).
Can I use this for steam applications?
The B251 is rated for chilled and hot water systems. For steam service, please consult our technical team for a valve specifically rated for steam temperatures and pressures.
Is the flow direction critical?
Yes, for 2-way characterized control valves, the valve must be installed with the characterizing disc upstream to ensure the intended flow characteristic is achieved.
This item is not eligible for free shipping.
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: $501.80
-65%$501.80
$175.63Belimo B251 Valve
The Belimo B251 is a 2-inch 2-way Characterized Control Valve (CCV) designed for high-performance hydronic control in HVAC systems. Featuring a 65 Cv rating and NPT female threaded connections, this valve is engineered with a nickel-plated forged brass body and robust stainless steel ball and stem to withstand demanding environments. Designed specifically for chilled or hot water applications, it manages fluid temperatures up to 250°F and glycol solutions up to 60%. The equal percentage flow characteristic ensures linear heat transfer and prevents control loop hunting in air handling units, fan coils, and unit ventilators. With a 400 psi body pressure rating and a 200 psi close-off capability, the B251 provides zero leakage (Port A to AB) and self-cleaning operation to reduce maintenance in variable flow hydronic systems.
Key Benefits:- Optimized Control: The equal percentage flow curve provides precise modulation for heating and cooling coils.
- Durable Construction: Stainless steel ball and stem offer superior resistance to corrosion and scaling compared to chrome-plated alternatives.
- High Capacity: A 65 Cv rating supports significant flow rates for large 2-inch NPT piping systems.
- Leak-Free Performance: Technical EPDM O-rings and PTFE seats ensure a tight 0% leakage rate at shut-off.
What actuators are compatible with the B251?
This valve is designed to pair with Belimo fail-safe and non-fail-safe actuators, including the ARB, ARX, and AFRB series, depending on the required torque and control signal (On/Off, Floating, or Proportional).
Can I use this for steam applications?
The B251 is rated for chilled and hot water systems. For steam service, please consult our technical team for a valve specifically rated for steam temperatures and pressures.
Is the flow direction critical?
Yes, for 2-way characterized control valves, the valve must be installed with the characterizing disc upstream to ensure the intended flow characteristic is achieved.
This item is not eligible for free shipping.
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.
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Product Information
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Shipping & Returns
Description
The Belimo B251 is a 2-inch 2-way Characterized Control Valve (CCV) designed for high-performance hydronic control in HVAC systems. Featuring a 65 Cv rating and NPT female threaded connections, this valve is engineered with a nickel-plated forged brass body and robust stainless steel ball and stem to withstand demanding environments. Designed specifically for chilled or hot water applications, it manages fluid temperatures up to 250°F and glycol solutions up to 60%. The equal percentage flow characteristic ensures linear heat transfer and prevents control loop hunting in air handling units, fan coils, and unit ventilators. With a 400 psi body pressure rating and a 200 psi close-off capability, the B251 provides zero leakage (Port A to AB) and self-cleaning operation to reduce maintenance in variable flow hydronic systems.
Key Benefits:- Optimized Control: The equal percentage flow curve provides precise modulation for heating and cooling coils.
- Durable Construction: Stainless steel ball and stem offer superior resistance to corrosion and scaling compared to chrome-plated alternatives.
- High Capacity: A 65 Cv rating supports significant flow rates for large 2-inch NPT piping systems.
- Leak-Free Performance: Technical EPDM O-rings and PTFE seats ensure a tight 0% leakage rate at shut-off.
What actuators are compatible with the B251?
This valve is designed to pair with Belimo fail-safe and non-fail-safe actuators, including the ARB, ARX, and AFRB series, depending on the required torque and control signal (On/Off, Floating, or Proportional).
Can I use this for steam applications?
The B251 is rated for chilled and hot water systems. For steam service, please consult our technical team for a valve specifically rated for steam temperatures and pressures.
Is the flow direction critical?
Yes, for 2-way characterized control valves, the valve must be installed with the characterizing disc upstream to ensure the intended flow characteristic is achieved.
This item is not eligible for free shipping.
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.
