Description
Siemens Building Technology 257-02008B Valve Assembly Overview
The Siemens Building Technology 257-02008B is a complete 2-way, normally closed valve assembly engineered for precise flow control in commercial HVAC and building automation systems. Featuring a forged brass body with brass trim, this valve delivers long-lasting durability and reliable sealing performance in demanding hydronic and pneumatic control applications.
Key Features
- 2-way, normally closed (NC) configuration for fail-safe operation
- 1/2″ NPT end connections for straightforward installation into standard piping systems
- 2.5 Cv flow coefficient for accurate flow capacity sizing
- Equal percentage flow characteristic for stable, responsive control across the full valve stroke
- Forged brass body with brass trim for corrosion resistance and mechanical strength
- Integrated pneumatic actuator with a 3–8 PSI spring range for compatibility with standard pneumatic control systems
Specifications
- SKU / Part Number: 257-02008B
- Brand: Siemens Building Technology
- Valve Type: 2-Way, Normally Closed
- Connection Size: 1/2″ NPT
- Flow Coefficient (Cv): 2.5
- Flow Characteristic: Equal Percentage
- Body Material: Forged Brass
- Trim Material: Brass
- Actuator Type: Pneumatic
- Spring Range: 3–8 PSI
Applications
The 257-02008B is well suited for a wide range of commercial building automation and HVAC control applications, including hydronic heating and cooling coil control, fan coil units, air handling units, and other systems requiring reliable pneumatic modulating valve control. The equal percentage flow characteristic ensures smooth, proportional control response, making it ideal for variable flow systems where precise temperature regulation is critical.
Why Choose Siemens Building Technology
Siemens Building Technology is a globally recognized leader in building automation and HVAC controls, delivering products engineered to meet the rigorous demands of commercial and industrial environments. The 257-02008B reflects Siemens’ commitment to quality construction, reliable performance, and seamless integration with pneumatic control systems.
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