Siemens Building Technology 255-01126 Zone Control Valve Assembly 1/2" Normally Open 0-10VDC Linear Bronze

The Siemens Building Technology 255-01126 is a complete zone control valve assembly featuring a Powermite 599 MZ Series bronze valve body paired with an SSB61U electro-mechanical actuator. This 2-way normally open valve assembly is designed for precise control of hot or chilled water in HVAC applications.

Key Specifications:

• Valve Size: 1/2 inch female NPT connections (FxF)
• Flow Coefficient (Cv): 4.0
• Configuration: 2-way, normally open (stem-up-to-open)
• Control Type: Proportional 0-10 VDC linear signal
• Close-off Pressure: 35 psi
• ANSI Class 250 rated
• Bronze body construction for durability
• Stroke Time: 34 seconds for proportional actuators
• Operating Temperature: 41°F to 122°F (5°C to 50°C)

Features:

• SSB61U 0-10 VDC fail-in-place electro-mechanical actuator
• Linear control provides precise modulating control
• Compact design ideal for zone applications
• CE approved and UL listed (File #E220114)
• Compatible with building automation systems using 0-10 VDC control signals

Common applications include zone control for radiators, floor heating manifolds, fan coil units, reheat coils, cooling ceilings, wall-mounted boilers, and VAV terminal units. The normally open configuration ensures flow when power is removed, making it suitable for fail-safe heating applications.