Siemens Building Technology 279-05990 2-Way Normally Closed Control Valve 2.5" Flanged 63 Cv with 12" Pneumatic Actuator

The Siemens Building Technology 279-05990 is a 2-1/2 inch, 2-way normally closed control valve assembly featuring a 12-inch pneumatic actuator and a flow coefficient (Cv) of 63. This ANSI Class 125 PSI flanged valve is part of the proven Flowrite series, designed for precise flow control in commercial and industrial HVAC applications.

Key Features:

• 2-1/2 inch flanged connection with bronze trim and 3/4 inch stroke
• Equal percentage flow characteristic for optimal control
• 12-inch spring return pneumatic actuator for fail-safe operation
• 125 PSI pressure rating for reliable performance
• 63 Cv flow capacity suitable for medium-flow applications
• Normally closed configuration returns to closed position on air failure

This valve assembly is ideal for hot water, chilled water, and glycol solution systems in heating and cooling applications. The robust bronze construction ensures long-term durability, while the pneumatic actuator provides smooth, accurate modulating control for maintaining precise temperature and flow conditions in building automation systems.