Siemens SFA11U 120V On/Off Zone Valve Actuator

The Siemens SFA11U is a 120-volt electric actuator designed for on/off control of HVAC zone valves in commercial and residential applications. This spring return actuator provides reliable automated control for hydronic heating and cooling systems.

Key Features:

• 120VAC power supply for standard electrical systems
• On/off control operation for simple two-position valve control
• Spring return design ensures fail-safe valve positioning during power loss
• Compatible with Siemens GG series globe valves and other standard zone valves
• Compact design for easy installation in tight mechanical spaces
• Durable construction for long-term reliability in HVAC applications
• 90-second nominal run time for efficient operation

This actuator is ideal for hydronic zoning systems, providing precise control over individual heating and cooling zones. The spring return mechanism automatically closes the valve when power is removed, making it suitable for normally closed applications. Commonly used in radiant heating systems, fan coil units, and multi-zone HVAC installations.