Description
Overview
The Siemens Building Technology 257-02031 is a 2-way, normally open valve assembly engineered for precision flow control in commercial HVAC and building automation systems. Featuring a forged brass body with brass trim, this valve delivers reliable performance and long service life in hydronic and pneumatic control applications.
Key Features
- 2-way, normally open (N/O) valve configuration for fail-safe operation
- 1/2″ NPT x Union Male end connections for easy installation and serviceability
- 0.4 Cv flow coefficient with equal percentage flow characteristic for precise modulating control
- Forged brass body with brass trim for durability and corrosion resistance
- Integrated pneumatic actuator with 3–8 PSI spring range for direct compatibility with standard pneumatic control systems
Specifications
- SKU: 257-02031
- Valve Type: 2-Way, Normally Open
- Connection Size: 1/2″
- Connection Type: NPT x Union Male
- Flow Coefficient (Cv): 0.4
- Flow Characteristic: Equal Percentage
- Body Material: Forged Brass
- Trim Material: Brass
- Actuator Type: Pneumatic
- Spring Range: 3–8 PSI
Applications
Ideal for use in commercial HVAC systems, building automation, and pneumatic control applications where precise modulating flow control of water or other compatible media is required. The normally open design ensures continued flow in the event of air supply loss, supporting fail-safe system operation.
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