Siemens 599-04321-2.5 1/2" Pressure Independent Control Valve 2.5 GPM

The Siemens 599-04321-2.5 is a 1/2-inch pressure independent control valve (PICV) designed for hydronic heating and cooling systems. This valve combines a differential pressure regulator and a control valve in a single, compact unit, maintaining constant flow regardless of pressure fluctuations in the system.

Key Features:

• 1/2-inch connection size for small zone applications
• 2.5 GPM maximum flow rate capacity
• Pressure independent operation ensures consistent flow control
• Integrated differential pressure controller eliminates need for separate balancing valves
• Reduces commissioning time and system complexity
• Suitable for chilled water and hot water applications

This PICV is ideal for terminal units such as fan coil units, VAV boxes with reheat coils, and other small hydronic equipment requiring precise flow control. The pressure independent design maintains setpoint flow rates even when system pressure varies, improving energy efficiency and comfort control in commercial HVAC applications.