Siemens Building Technology 283-03188 2" Normally Closed Control Valve Assembly with Pneumatic Actuator

The Siemens Building Technology 283-03188 is a complete Flowrite 599 Series valve and actuator assembly designed for precise control of hot or chilled water in HVAC systems. This factory-assembled unit combines a 2-inch, 2-way normally closed globe valve with an 8-inch pneumatic actuator featuring an integrated positioner for accurate modulating control.

Key Features:

• 2-inch valve size with 40 Cv flow coefficient for medium-capacity applications
• Normally closed (NC) fail-safe operation with spring return actuator
• Equal percentage flow characteristic for precise temperature control
• Bronze trim construction for durability and corrosion resistance
• 8-inch pneumatic actuator with factory-mounted positioner and 5 psi span
• NPT threaded connections for easy installation
• ANSI Class 125 body rating suitable for standard HVAC systems
• Operating temperature range of 34°F to 230°F (1°C to 110°C)
• 3-8 psi control signal for proportional control applications

This assembly is ideal for zone control applications including radiators, floor heating manifolds, fan coil units, cooling ceilings, and VAV systems. The factory-assembled configuration ensures proper actuator-to-valve matching and reduces installation time while eliminating potential field assembly errors.