Siemens Building Technology 371-03133 2-Way Normally Closed Control Valve Assembly 1-1/2 Inch 25 Cv

The Siemens Building Technology 371-03133 is a 2-way normally closed valve assembly from the Flowrite 599 Series, designed for precise modulating control in commercial HVAC hot and chilled water applications. This 1-1/2 inch valve assembly features a 25 Cv flow coefficient and equal percentage flow characteristic for accurate temperature control.

Key Features:

• ANSI Class 250 bronze body construction for durability
• Stainless steel trim with metal-to-metal seating for reliable shutoff
• SAX61.03U electronic actuator with proportional control (0-10 VDC or 4-20 mA)
• Non-spring return actuator with 24 VAC operation
• Female x female NPT threaded connections for easy installation
• Equal percentage flow characteristic optimized for heating/cooling applications
• ANSI Leakage Class IV rating (0.01% of Cv)
• 100:1 rangeability for precise control across wide load conditions

The normally closed configuration ensures the valve closes when power is removed, providing fail-safe operation. The proportional electronic actuator accepts both analog voltage and current control signals, making it compatible with most building automation systems.