Siemens Building Technology 283-05971 3-Inch 2-Way Normally Closed Flanged Control Valve Assembly with Actuator and Positioner

The Siemens Building Technology 283-05971 is a complete valve assembly designed for precise flow control in commercial HVAC and building automation systems. This professional-grade assembly combines a 3-inch flanged globe valve with an integrated pneumatic actuator and factory-mounted positioner for reliable, accurate control performance.

Key Features:

• 2-way normally closed (NC) operation for fail-safe control
• 3-inch flanged end connections, ANSI Class 125 rated
• 100 Cv flow coefficient for high-capacity applications
• Equal percentage flow characteristic for optimal control
• Stainless steel trim for durability and corrosion resistance
• Factory-mounted positioner for precise valve positioning feedback
• Pneumatic actuator with 3/4-inch stroke
• Suitable for water and glycol solutions up to 50%

This Flowrite 599 Series valve assembly is ideal for commercial buildings, industrial facilities, and process control applications requiring accurate modulating control. The integrated positioner ensures precise valve positioning and feedback for advanced building automation systems. The normally closed configuration provides safety by closing the valve in the event of air supply failure.