Description
The Siemens 256-02008 is a complete valve and actuator assembly engineered for precise flow control in commercial HVAC and building automation systems. This factory-matched assembly pairs a 2-way, normally closed control valve with a pneumatic actuator, delivering reliable, fail-safe operation in air-handling, chilled water, hot water, and steam applications.
Valve Configuration
- 2-way, normally closed (NC) design — valve closes on loss of air signal for fail-safe operation
- 1/2″ NPT end connections for straightforward pipe installation
- 2.5 Cv flow coefficient for accurate flow capacity sizing
- Equal percentage flow characteristic for stable, linear control response across the full operating range
- Forged brass body with brass trim for durability and corrosion resistance in hydronic and HVAC service
Pneumatic Actuator
- 10–15 PSI spring range provides consistent, proportional actuation force
- Pneumatic operation integrates seamlessly with existing pneumatic control systems
- Factory-assembled and matched to the valve for optimized performance and reduced installation time
Key Benefits
- Fail-safe normally closed position protects system on air supply loss
- Equal percentage characteristic ensures smooth, stable modulation across varying load conditions
- Forged brass construction offers long service life in commercial HVAC environments
- Pre-assembled valve and actuator combination reduces field labor and commissioning time
- Designed for use in building automation and direct digital control (DDC) pneumatic systems
Specifications
- SKU: 256-02008
- 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: 10–15 PSI
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