Siemens Building Technology 283-03169 1.5" Two-Way Normally Open Valve Assembly with Pneumatic Actuator

The Siemens Building Technology 283-03169 is a complete valve and actuator assembly designed for HVAC water control applications. This factory-assembled unit combines a 1.5-inch two-way normally open (NO) valve with an 8-inch pneumatic actuator equipped with a factory-mounted positioner for precise modulating control.

Key Features:

• 1.5-inch (40mm) two-way normally open valve configuration
• Flow coefficient (Cv) of 25 for optimal water flow capacity
• Equal percentage flow characteristic for precise control
• Bronze trim construction for durability and corrosion resistance
• NPT threaded connections for standard pipe installation
• 8-inch stroke pneumatic actuator with integrated positioner
• 3-8 PSI (21-55 kPa) control signal for modulating operation
• Factory-assembled and tested for reliable performance

This valve assembly is ideal for hot or chilled water applications in commercial HVAC systems, including zone control, fan coil units, heating and cooling coils, and building automation systems requiring precise flow modulation. The normally open design ensures fail-safe operation in the event of air supply loss, while the positioner provides accurate valve positioning throughout the stroke range.