Siemens Building Technology 259-02006 Normally Closed Valve Assembly Cv HVAC Control Valves & Actuators - 2-Way 1/2-Inch 1.6

The Siemens Building Technology 259-02006 is a professional-grade 2-way valve assembly designed for precise flow control in HVAC and building automation systems. This normally closed valve features a compact 1/2-inch line size with a flow coefficient (Cv) of 1.6, making it ideal for small to medium zone control applications.

Key Features:

• Normally closed (N/C) operation provides fail-safe protection in power loss situations
• 1/2-inch female by female (FxF) threaded connections for standard pipe installation
• Durable brass trim construction ensures long service life and corrosion resistance
• Electronic actuator with floating control for proportional modulation
• Fail-in-place function maintains valve position during power interruptions
• 1.6 Cv rating suitable for hydronic heating and cooling zone control
• Compatible with Siemens SSC81U series actuators for integrated building control

This valve assembly is commonly used in chilled water systems, hot water heating circuits, fan coil units, and radiator zone control applications. The floating control design allows for smooth, proportional valve positioning in response to control signals, providing precise temperature control and energy efficiency. The brass trim ensures reliable operation with standard water-glycol mixtures used in commercial HVAC systems.