Description
Overview
The Siemens Building Technology 257-02035 is a complete 2-way, normally open valve assembly engineered for precise flow control in commercial HVAC and building automation systems. Featuring a forged brass body with brass trim, this assembly delivers long-lasting durability and reliable performance in demanding hydronic and pneumatic control applications.
Key Features
- 2-way, normally open (N/O) configuration for fail-safe operation
- 1/2″ NPT x union male end connections for straightforward installation and easy servicing
- 1.0 Cv flow coefficient with equal percentage flow characteristic for accurate, responsive control
- Forged brass body with brass trim for corrosion resistance and 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
Specifications
- SKU: 257-02035
- Brand: Siemens Building Technology
- Valve Configuration: 2-Way, Normally Open (N/O)
- Connection Size: 1/2″
- Connection Type: NPT x Union Male
- 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
- Commercial HVAC hydronic heating and cooling systems
- Building automation and pneumatic control systems
- Fan coil units, air handling units, and terminal equipment
- Applications requiring fail-safe normally open valve operation
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