Siemens Building Technology 257-02030 Valve Assembly
The Siemens Building Technology 257-02030 Valve Assembly is a high-precision solution for terminal unit control in hydronic systems. This 2-way normally open pneumatic valve is engineered with a 1/2 inch NPT connection and a robust forged brass body designed to handle water and 50% water-glycol solutions. With a 0.4 Cv equal percentage flow characteristic, it ensures stable modulating control for convectors, fan coil units, and reheat coils. The assembly features a brass trim and is integrated with a 2-inch pneumatic actuator operating on a 3-8 PSI spring range. This direct-coupled design allows for efficient installation without specialized tools, making it a reliable choice for contractors managing HVAC pneumatic control systems. Rated for ANSI Class 250 service, the valve provides a tight Class IV leakage seal and supports close-off pressures up to 95 PSI, ensuring long-term performance in demanding commercial environments where precise fluid regulation is critical for system efficiency.
- Precise Flow Control: The 0.4 Cv flow coefficient and modified equal percentage characteristic offer superior throttling for terminal unit applications.
- Durable Construction: Features a forged brass body and brass trim for reliable operation in both hot and chilled water systems.
- Pneumatic Reliability: Equipped with a 2-inch actuator and a 3-8 PSI spring range for consistent normally open fail-safe positioning.
- Ease of Installation: The 1/2" NPT threaded connections and universal bonnet design simplify field mounting and piping alignment.
Common Questions:
What is the maximum operating temperature for this assembly?
This Siemens 599 series valve is rated for media temperatures ranging from 35°F to 250°F, making it suitable for most hydronic heating and cooling loops.
Can this valve be used for steam service?
This specific model utilizes brass trim, which is optimized for liquid service. For low-pressure steam applications under 15 PSI, Siemens typically recommends models with stainless steel trim.
Is the actuator replaceable?
Yes, the MT series design allows the pneumatic actuator to be removed or replaced easily using the universal bonnet connection without removing the valve body from the piping.
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 257-02030 Valve Assembly
The Siemens Building Technology 257-02030 Valve Assembly is a high-precision solution for terminal unit control in hydronic systems. This 2-way normally open pneumatic valve is engineered with a 1/2 inch NPT connection and a robust forged brass body designed to handle water and 50% water-glycol solutions. With a 0.4 Cv equal percentage flow characteristic, it ensures stable modulating control for convectors, fan coil units, and reheat coils. The assembly features a brass trim and is integrated with a 2-inch pneumatic actuator operating on a 3-8 PSI spring range. This direct-coupled design allows for efficient installation without specialized tools, making it a reliable choice for contractors managing HVAC pneumatic control systems. Rated for ANSI Class 250 service, the valve provides a tight Class IV leakage seal and supports close-off pressures up to 95 PSI, ensuring long-term performance in demanding commercial environments where precise fluid regulation is critical for system efficiency.
- Precise Flow Control: The 0.4 Cv flow coefficient and modified equal percentage characteristic offer superior throttling for terminal unit applications.
- Durable Construction: Features a forged brass body and brass trim for reliable operation in both hot and chilled water systems.
- Pneumatic Reliability: Equipped with a 2-inch actuator and a 3-8 PSI spring range for consistent normally open fail-safe positioning.
- Ease of Installation: The 1/2" NPT threaded connections and universal bonnet design simplify field mounting and piping alignment.
Common Questions:
What is the maximum operating temperature for this assembly?
This Siemens 599 series valve is rated for media temperatures ranging from 35°F to 250°F, making it suitable for most hydronic heating and cooling loops.
Can this valve be used for steam service?
This specific model utilizes brass trim, which is optimized for liquid service. For low-pressure steam applications under 15 PSI, Siemens typically recommends models with stainless steel trim.
Is the actuator replaceable?
Yes, the MT series design allows the pneumatic actuator to be removed or replaced easily using the universal bonnet connection without removing the valve body from the piping.
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 257-02030 Valve Assembly is a high-precision solution for terminal unit control in hydronic systems. This 2-way normally open pneumatic valve is engineered with a 1/2 inch NPT connection and a robust forged brass body designed to handle water and 50% water-glycol solutions. With a 0.4 Cv equal percentage flow characteristic, it ensures stable modulating control for convectors, fan coil units, and reheat coils. The assembly features a brass trim and is integrated with a 2-inch pneumatic actuator operating on a 3-8 PSI spring range. This direct-coupled design allows for efficient installation without specialized tools, making it a reliable choice for contractors managing HVAC pneumatic control systems. Rated for ANSI Class 250 service, the valve provides a tight Class IV leakage seal and supports close-off pressures up to 95 PSI, ensuring long-term performance in demanding commercial environments where precise fluid regulation is critical for system efficiency.
- Precise Flow Control: The 0.4 Cv flow coefficient and modified equal percentage characteristic offer superior throttling for terminal unit applications.
- Durable Construction: Features a forged brass body and brass trim for reliable operation in both hot and chilled water systems.
- Pneumatic Reliability: Equipped with a 2-inch actuator and a 3-8 PSI spring range for consistent normally open fail-safe positioning.
- Ease of Installation: The 1/2" NPT threaded connections and universal bonnet design simplify field mounting and piping alignment.
Common Questions:
What is the maximum operating temperature for this assembly?
This Siemens 599 series valve is rated for media temperatures ranging from 35°F to 250°F, making it suitable for most hydronic heating and cooling loops.
Can this valve be used for steam service?
This specific model utilizes brass trim, which is optimized for liquid service. For low-pressure steam applications under 15 PSI, Siemens typically recommends models with stainless steel trim.
Is the actuator replaceable?
Yes, the MT series design allows the pneumatic actuator to be removed or replaced easily using the universal bonnet connection without removing the valve body from the piping.
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.
