Siemens Building Technology 257-02040 Valve Assembly
The Siemens Building Technology 257-02040 is a specialized 2-way normally open control valve assembly designed for high-performance hydronic flow regulation. As a veteran-grade pneumatic HVAC control valve, this unit is engineered with a 1/2-inch angle NPT by union male connection, facilitating streamlined installation in tight mechanical spaces. The forged brass body and internal brass trim ensure rugged reliability against the constant cycling of commercial heating and cooling loops, maintaining seating integrity where lesser assemblies fail.
Operating with a 3–8 PSI spring range pneumatic actuator, the 257-02040 utilizes an equal percentage flow characteristic with a 2.5 Cv rating. This design is critical for stabilizing discharge temperatures, as it provides a linear relationship between the control signal and the heat exchanger output. By minimizing hunting and preventing thermal overshoot, this assembly ensures precise modulation in terminal units like fan coils and induction units. The normally open fail-safe position provides a predictable state during loss of control air, a standard requirement for critical HVAC sequencing.
Key Benefits:- 2.5 Cv Flow Rating: Optimized for precise secondary loop modulation and stable temperature control.
- Forged Brass Construction: High-density body material provides superior pressure containing capabilities and corrosion resistance.
- Angle NPT x Union Male Connection: Simplifies piping geometry and reduces the need for additional fittings during field replacement.
- 3–8 PSI Actuator Range: Standard pneumatic calibration allows for seamless integration into existing BAS pneumatic architectures.
- Fail-Safe Normally Open: Ensures maximum flow delivery upon loss of signal to prevent freezing or stagnation in cold-weather applications.
What media is compatible with the 257-02040?
This assembly is primarily designed for closed-loop chilled water and hot water applications containing standard HVAC chemical treatments.
Can the actuator be replaced without removing the valve body?
Yes, the pneumatic actuator is field-serviceable, allowing for maintenance while the forged brass body remains piped into the system.
How does equal percentage trim benefit the system?
It compensates for the non-linear heat transfer characteristics of water-to-air coils, resulting in more linear and predictable control of the space temperature.
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: $152.10
-65%$152.10
$53.23Siemens Building Technology 257-02040 Valve Assembly
The Siemens Building Technology 257-02040 is a specialized 2-way normally open control valve assembly designed for high-performance hydronic flow regulation. As a veteran-grade pneumatic HVAC control valve, this unit is engineered with a 1/2-inch angle NPT by union male connection, facilitating streamlined installation in tight mechanical spaces. The forged brass body and internal brass trim ensure rugged reliability against the constant cycling of commercial heating and cooling loops, maintaining seating integrity where lesser assemblies fail.
Operating with a 3–8 PSI spring range pneumatic actuator, the 257-02040 utilizes an equal percentage flow characteristic with a 2.5 Cv rating. This design is critical for stabilizing discharge temperatures, as it provides a linear relationship between the control signal and the heat exchanger output. By minimizing hunting and preventing thermal overshoot, this assembly ensures precise modulation in terminal units like fan coils and induction units. The normally open fail-safe position provides a predictable state during loss of control air, a standard requirement for critical HVAC sequencing.
Key Benefits:- 2.5 Cv Flow Rating: Optimized for precise secondary loop modulation and stable temperature control.
- Forged Brass Construction: High-density body material provides superior pressure containing capabilities and corrosion resistance.
- Angle NPT x Union Male Connection: Simplifies piping geometry and reduces the need for additional fittings during field replacement.
- 3–8 PSI Actuator Range: Standard pneumatic calibration allows for seamless integration into existing BAS pneumatic architectures.
- Fail-Safe Normally Open: Ensures maximum flow delivery upon loss of signal to prevent freezing or stagnation in cold-weather applications.
What media is compatible with the 257-02040?
This assembly is primarily designed for closed-loop chilled water and hot water applications containing standard HVAC chemical treatments.
Can the actuator be replaced without removing the valve body?
Yes, the pneumatic actuator is field-serviceable, allowing for maintenance while the forged brass body remains piped into the system.
How does equal percentage trim benefit the system?
It compensates for the non-linear heat transfer characteristics of water-to-air coils, resulting in more linear and predictable control of the space temperature.
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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Description
The Siemens Building Technology 257-02040 is a specialized 2-way normally open control valve assembly designed for high-performance hydronic flow regulation. As a veteran-grade pneumatic HVAC control valve, this unit is engineered with a 1/2-inch angle NPT by union male connection, facilitating streamlined installation in tight mechanical spaces. The forged brass body and internal brass trim ensure rugged reliability against the constant cycling of commercial heating and cooling loops, maintaining seating integrity where lesser assemblies fail.
Operating with a 3–8 PSI spring range pneumatic actuator, the 257-02040 utilizes an equal percentage flow characteristic with a 2.5 Cv rating. This design is critical for stabilizing discharge temperatures, as it provides a linear relationship between the control signal and the heat exchanger output. By minimizing hunting and preventing thermal overshoot, this assembly ensures precise modulation in terminal units like fan coils and induction units. The normally open fail-safe position provides a predictable state during loss of control air, a standard requirement for critical HVAC sequencing.
Key Benefits:- 2.5 Cv Flow Rating: Optimized for precise secondary loop modulation and stable temperature control.
- Forged Brass Construction: High-density body material provides superior pressure containing capabilities and corrosion resistance.
- Angle NPT x Union Male Connection: Simplifies piping geometry and reduces the need for additional fittings during field replacement.
- 3–8 PSI Actuator Range: Standard pneumatic calibration allows for seamless integration into existing BAS pneumatic architectures.
- Fail-Safe Normally Open: Ensures maximum flow delivery upon loss of signal to prevent freezing or stagnation in cold-weather applications.
What media is compatible with the 257-02040?
This assembly is primarily designed for closed-loop chilled water and hot water applications containing standard HVAC chemical treatments.
Can the actuator be replaced without removing the valve body?
Yes, the pneumatic actuator is field-serviceable, allowing for maintenance while the forged brass body remains piped into the system.
How does equal percentage trim benefit the system?
It compensates for the non-linear heat transfer characteristics of water-to-air coils, resulting in more linear and predictable control of the space temperature.
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.
