Siemens Building Technology 257-02055 Valve Assembly
The Siemens 257-02055 Valve Assembly is a high-performance 2-way normally open valve designed for precision control of hot or chilled water and low-pressure steam in terminal units. Built on the rugged Powermite 599 MT Series platform, this assembly features a 1/2-inch NPT connection and a 2.5 Cv flow coefficient. The forged brass body is paired with stainless steel trim to ensure long-term durability and resistance to scaling in demanding hydronic loops. The pneumatic actuator operates on a 3-8 psi spring range, providing fail-safe protection by returning the valve to the open position upon loss of signal pressure. With an equal percentage flow characteristic, it delivers superior modulation and linear heat output, making it an essential component for contractors managing HVAC zone control systems. This 257-02055 Siemens assembly is ANSI Class 250 rated, capable of handling high-pressure applications with consistent pneumatic valve reliability.
Key Benefits:- Precision Modulation: The equal percentage flow characteristic ensures stable temperature control and optimized energy efficiency in terminal unit applications.
- Industrial-Grade Construction: Features a robust forged brass body and stainless steel trim for enhanced corrosion resistance and extended service life.
- Fail-Safe Operation: Integrated pneumatic actuator with a 3-8 psi spring range ensures the valve remains normally open for system safety during air pressure failure.
- High Pressure Rating: Rated for ANSI Class 250, making it suitable for high-rise buildings and demanding commercial mechanical rooms.
- Easy Installation: Standard 1/2-inch NPT valve connections allow for straightforward integration into existing pipe mains and runouts.
What media is the Siemens 257-02055 compatible with?
This valve is engineered for hot water, chilled water, and water-glycol solutions up to 50%. Due to the stainless steel trim, it is also suitable for low-pressure steam up to 15 psi.
How does the normally open function work in an HVAC system?
A normally open configuration ensures that the valve remains at full flow if pneumatic pressure is lost, which is critical for preventing coil freeze-up in heating applications.
Can I use this assembly for high-velocity zone control?
Yes, the 2.5 Cv rating and modified equal percentage plug design are specifically tailored for precise throttling in terminal units like fan coils and convectors.
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.
Siemens Building Technology 257-02055 Valve Assembly
The Siemens 257-02055 Valve Assembly is a high-performance 2-way normally open valve designed for precision control of hot or chilled water and low-pressure steam in terminal units. Built on the rugged Powermite 599 MT Series platform, this assembly features a 1/2-inch NPT connection and a 2.5 Cv flow coefficient. The forged brass body is paired with stainless steel trim to ensure long-term durability and resistance to scaling in demanding hydronic loops. The pneumatic actuator operates on a 3-8 psi spring range, providing fail-safe protection by returning the valve to the open position upon loss of signal pressure. With an equal percentage flow characteristic, it delivers superior modulation and linear heat output, making it an essential component for contractors managing HVAC zone control systems. This 257-02055 Siemens assembly is ANSI Class 250 rated, capable of handling high-pressure applications with consistent pneumatic valve reliability.
Key Benefits:- Precision Modulation: The equal percentage flow characteristic ensures stable temperature control and optimized energy efficiency in terminal unit applications.
- Industrial-Grade Construction: Features a robust forged brass body and stainless steel trim for enhanced corrosion resistance and extended service life.
- Fail-Safe Operation: Integrated pneumatic actuator with a 3-8 psi spring range ensures the valve remains normally open for system safety during air pressure failure.
- High Pressure Rating: Rated for ANSI Class 250, making it suitable for high-rise buildings and demanding commercial mechanical rooms.
- Easy Installation: Standard 1/2-inch NPT valve connections allow for straightforward integration into existing pipe mains and runouts.
What media is the Siemens 257-02055 compatible with?
This valve is engineered for hot water, chilled water, and water-glycol solutions up to 50%. Due to the stainless steel trim, it is also suitable for low-pressure steam up to 15 psi.
How does the normally open function work in an HVAC system?
A normally open configuration ensures that the valve remains at full flow if pneumatic pressure is lost, which is critical for preventing coil freeze-up in heating applications.
Can I use this assembly for high-velocity zone control?
Yes, the 2.5 Cv rating and modified equal percentage plug design are specifically tailored for precise throttling in terminal units like fan coils and convectors.
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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Description
The Siemens 257-02055 Valve Assembly is a high-performance 2-way normally open valve designed for precision control of hot or chilled water and low-pressure steam in terminal units. Built on the rugged Powermite 599 MT Series platform, this assembly features a 1/2-inch NPT connection and a 2.5 Cv flow coefficient. The forged brass body is paired with stainless steel trim to ensure long-term durability and resistance to scaling in demanding hydronic loops. The pneumatic actuator operates on a 3-8 psi spring range, providing fail-safe protection by returning the valve to the open position upon loss of signal pressure. With an equal percentage flow characteristic, it delivers superior modulation and linear heat output, making it an essential component for contractors managing HVAC zone control systems. This 257-02055 Siemens assembly is ANSI Class 250 rated, capable of handling high-pressure applications with consistent pneumatic valve reliability.
Key Benefits:- Precision Modulation: The equal percentage flow characteristic ensures stable temperature control and optimized energy efficiency in terminal unit applications.
- Industrial-Grade Construction: Features a robust forged brass body and stainless steel trim for enhanced corrosion resistance and extended service life.
- Fail-Safe Operation: Integrated pneumatic actuator with a 3-8 psi spring range ensures the valve remains normally open for system safety during air pressure failure.
- High Pressure Rating: Rated for ANSI Class 250, making it suitable for high-rise buildings and demanding commercial mechanical rooms.
- Easy Installation: Standard 1/2-inch NPT valve connections allow for straightforward integration into existing pipe mains and runouts.
What media is the Siemens 257-02055 compatible with?
This valve is engineered for hot water, chilled water, and water-glycol solutions up to 50%. Due to the stainless steel trim, it is also suitable for low-pressure steam up to 15 psi.
How does the normally open function work in an HVAC system?
A normally open configuration ensures that the valve remains at full flow if pneumatic pressure is lost, which is critical for preventing coil freeze-up in heating applications.
Can I use this assembly for high-velocity zone control?
Yes, the 2.5 Cv rating and modified equal percentage plug design are specifically tailored for precise throttling in terminal units like fan coils and convectors.
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.
