Description
Overview
The Siemens Building Technology 259-02051 is a complete 2-way, normally open valve assembly engineered for precise hydronic and HVAC control applications. Combining a forged brass valve body with stainless steel trim and a non-spring return floating actuator, this assembly delivers reliable, long-service performance in commercial building automation systems.
Key Features
- 2-way, normally open (N/O) configuration for fail-safe operation
- 1/2″ NPT end connections for straightforward pipe installation
- 24Vac actuator voltage — compatible with standard BAS and DDC control systems
- 1.0 Cv flow coefficient with equal percentage flow characteristic for accurate modulating control
- Forged brass valve body for superior pressure and corrosion resistance
- Stainless steel trim for extended service life and dependable shutoff
- Non-spring return floating actuator — holds last position on power loss
- Pre-assembled valve and actuator combination reduces installation time
Application
Ideal for use in commercial HVAC hydronic systems including fan coil units, unit ventilators, heat exchangers, and terminal unit control. The equal percentage flow characteristic provides excellent controllability across a wide range of load conditions, making it well-suited for variable flow heating and cooling applications managed by building automation systems.
Specifications
- SKU: 259-02051
- Brand: Siemens Building Technology
- Valve Configuration: 2-Way, Normally Open
- Connection Size: 1/2″ NPT
- Actuator Voltage: 24Vac
- Flow Coefficient (Cv): 1.0
- Flow Characteristic: Equal Percentage
- Body Material: Forged Brass
- Trim Material: Stainless Steel
- Actuator Type: Non-Spring Return, Floating Control
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