Siemens Building Technology 257-02041 Valve Assembly
The Siemens Building Technology 257-02041 Valve Assembly is a contractor-grade solution for precise hydronic control in terminal units and convective applications. This 2-way normally open valve features a 1/2-inch NPT connection and a 4.0 Cv rating, utilizing a modified equal percentage flow characteristic to ensure linear heat transfer and stable temperature regulation. Built with a robust forged brass body and durable brass trim, the assembly is designed to handle medium-temperature hot or chilled water ranging from 35°F to 250°F. The integrated 2-inch pneumatic actuator operates on a 3-8 PSI spring range, providing reliable failsafe performance by returning the valve to the open position upon loss of air pressure. This ANSI Class 250 rated assembly is frequently used in HVAC zone control systems where high close-off pressure—up to 45 PSI—is required for tight shut-off and system efficiency.
Key Benefits- Precise Hydronic Control: The 4.0 Cv rating and modified equal percentage plug design provide accurate throttled flow for chilled water systems.
- Failsafe Pneumatic Operation: Internal mechanical spring ensures a normally open state, protecting coils from freezing during pneumatic signal loss.
- Durable Construction: Forged brass body with brass trim meets ANSI 250 standards, ensuring longevity in demanding commercial HVAC environments.
- Simplified Installation: Standard 1/2-inch NPT valve connection allows for direct integration into existing piping without specialized adapters.
What is the maximum operating pressure for this Siemens valve?
This assembly is rated for ANSI Class 250 applications with a maximum static pressure of 250 PSI and a pneumatic close-off rating of 45 PSI.
Is this valve suitable for steam applications?
While the brass body is robust, this specific 257-02041 configuration is optimized for hot and chilled water; for low-pressure steam, verify compliance with local 15 PSI trim requirements.
Can I field-replace the actuator on this assembly?
Yes, the 2-inch pneumatic actuator is direct-coupled and can be serviced or replaced without removing the valve body from the line.
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: $138.92
-65%$138.92
$48.62Siemens Building Technology 257-02041 Valve Assembly
The Siemens Building Technology 257-02041 Valve Assembly is a contractor-grade solution for precise hydronic control in terminal units and convective applications. This 2-way normally open valve features a 1/2-inch NPT connection and a 4.0 Cv rating, utilizing a modified equal percentage flow characteristic to ensure linear heat transfer and stable temperature regulation. Built with a robust forged brass body and durable brass trim, the assembly is designed to handle medium-temperature hot or chilled water ranging from 35°F to 250°F. The integrated 2-inch pneumatic actuator operates on a 3-8 PSI spring range, providing reliable failsafe performance by returning the valve to the open position upon loss of air pressure. This ANSI Class 250 rated assembly is frequently used in HVAC zone control systems where high close-off pressure—up to 45 PSI—is required for tight shut-off and system efficiency.
Key Benefits- Precise Hydronic Control: The 4.0 Cv rating and modified equal percentage plug design provide accurate throttled flow for chilled water systems.
- Failsafe Pneumatic Operation: Internal mechanical spring ensures a normally open state, protecting coils from freezing during pneumatic signal loss.
- Durable Construction: Forged brass body with brass trim meets ANSI 250 standards, ensuring longevity in demanding commercial HVAC environments.
- Simplified Installation: Standard 1/2-inch NPT valve connection allows for direct integration into existing piping without specialized adapters.
What is the maximum operating pressure for this Siemens valve?
This assembly is rated for ANSI Class 250 applications with a maximum static pressure of 250 PSI and a pneumatic close-off rating of 45 PSI.
Is this valve suitable for steam applications?
While the brass body is robust, this specific 257-02041 configuration is optimized for hot and chilled water; for low-pressure steam, verify compliance with local 15 PSI trim requirements.
Can I field-replace the actuator on this assembly?
Yes, the 2-inch pneumatic actuator is direct-coupled and can be serviced or replaced without removing the valve body from the line.
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 257-02041 Valve Assembly is a contractor-grade solution for precise hydronic control in terminal units and convective applications. This 2-way normally open valve features a 1/2-inch NPT connection and a 4.0 Cv rating, utilizing a modified equal percentage flow characteristic to ensure linear heat transfer and stable temperature regulation. Built with a robust forged brass body and durable brass trim, the assembly is designed to handle medium-temperature hot or chilled water ranging from 35°F to 250°F. The integrated 2-inch pneumatic actuator operates on a 3-8 PSI spring range, providing reliable failsafe performance by returning the valve to the open position upon loss of air pressure. This ANSI Class 250 rated assembly is frequently used in HVAC zone control systems where high close-off pressure—up to 45 PSI—is required for tight shut-off and system efficiency.
Key Benefits- Precise Hydronic Control: The 4.0 Cv rating and modified equal percentage plug design provide accurate throttled flow for chilled water systems.
- Failsafe Pneumatic Operation: Internal mechanical spring ensures a normally open state, protecting coils from freezing during pneumatic signal loss.
- Durable Construction: Forged brass body with brass trim meets ANSI 250 standards, ensuring longevity in demanding commercial HVAC environments.
- Simplified Installation: Standard 1/2-inch NPT valve connection allows for direct integration into existing piping without specialized adapters.
What is the maximum operating pressure for this Siemens valve?
This assembly is rated for ANSI Class 250 applications with a maximum static pressure of 250 PSI and a pneumatic close-off rating of 45 PSI.
Is this valve suitable for steam applications?
While the brass body is robust, this specific 257-02041 configuration is optimized for hot and chilled water; for low-pressure steam, verify compliance with local 15 PSI trim requirements.
Can I field-replace the actuator on this assembly?
Yes, the 2-inch pneumatic actuator is direct-coupled and can be serviced or replaced without removing the valve body from the line.
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.
