Description
The Siemens Building Technology 257-02013B is a precision-engineered 2-way normally closed valve assembly designed for demanding commercial HVAC and building automation applications. Combining a forged brass body with brass trim and a pneumatic actuator, this unit delivers reliable flow control in hydronic heating, cooling, and process piping systems.
Valve Configuration
- 2-way, normally closed (NC) configuration
- 3/4″ NPT x union male end connections for easy installation and serviceability
- Equal percentage flow characteristic for precise modulating control
- Flow coefficient (Cv): 6.3
Body & Trim Construction
- Forged brass valve body for superior strength and corrosion resistance
- Brass trim for long-term durability in hydronic and HVAC media
- Union male connections allow for quick removal and reinstallation without cutting pipe
Pneumatic Actuator
- Spring range: 3–8 PSI for reliable fail-safe normally closed operation
- Designed for use with standard pneumatic control systems
- Provides smooth, proportional modulation in response to pneumatic signal changes
Applications
- Commercial HVAC hydronic heating and cooling coil control
- Building automation and pneumatic control systems
- Fan coil units, air handling units, and terminal equipment
- Process piping requiring modulating flow control
Key Benefits
- Normally closed design ensures fail-safe shutoff on loss of pneumatic signal
- Equal percentage flow characteristic enables stable, accurate control across the full valve stroke
- Union male connections simplify field installation and maintenance
- Siemens Building Technology quality and engineering for long service life
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