Description
Product Overview
The Siemens Building Technology 257-02034 is a complete valve and actuator assembly engineered for reliable flow control in commercial HVAC hydronic and pneumatic systems. This 2-way, normally open configuration ensures fail-safe operation — the valve returns to the open position upon loss of control signal or air pressure, protecting system components and maintaining flow continuity.
Key Features
- 2-way, normally open (N/O) valve design for fail-safe flow control
- 1/2″ NPT end connections for straightforward installation
- 1.0 Cv flow coefficient with equal percentage flow characteristic for precise, proportional control across the full stroke range
- Forged brass body with brass trim — corrosion-resistant and built for long service life
- Integrated pneumatic actuator with 3–8 PSI spring range for compatibility with standard pneumatic control systems
- Complete valve-and-actuator assembly — ready to install out of the box
Technical Specifications
- SKU: 257-02034
- Valve Configuration: 2-Way, Normally Open
- Connection Size: 1/2″ NPT
- Flow Coefficient (Cv): 1.0
- 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 building automation systems, pneumatically controlled air handling units, fan coil units, and hydronic heating and cooling circuits where precise, proportional flow modulation is required. The equal percentage flow characteristic makes this valve well-suited for applications where fine control at low flow rates is critical.
Why Choose Siemens Building Technology
Siemens Building Technology is a globally recognized leader in HVAC controls and building automation. The 257-02034 reflects Siemens’ commitment to precision engineering, delivering consistent performance and long-term reliability in demanding commercial environments.
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