Siemens 255-01112 3/4 Inch Normally Closed 2-Way Control Valve with 24V Actuator

The Siemens 255-01112 is a 3/4-inch normally closed (NC) two-way globe valve with an integrated 24-volt spring return actuator, designed for precise flow control in commercial HVAC and building automation systems. This valve features a 6.3 Cv (flow coefficient) rating, making it suitable for medium-flow applications in chilled water, hot water, and hydronic heating/cooling systems.

Key Features:

• 3/4-inch NPT threaded connections for easy installation
• Normally closed (NC) operation—valve closes when power is removed for fail-safe operation
• 6.3 Cv flow coefficient for accurate flow control
• 24V AC/DC spring return actuator included
• Two-way valve design for on/off or modulating control applications
• Bronze or brass body construction for durability and corrosion resistance
• Compatible with Siemens building automation controllers and BACnet/LonWorks systems

This valve assembly is ideal for zone control, fan coil units, unit heaters, and other applications requiring reliable, automated flow control. The normally closed configuration provides safety by shutting off flow in the event of power loss or system failure.