Manufacturer Name: Siemens Building Technology Product Number: SFA11U OEM Part Number: SFA11U The Siemens SFA11U Zone Valve Actuator is a 2-position, spring return actuator designed for precise control in HVAC systems. Operating at 120V with a frequency of 60Hz, it is an electronic actuator with a normally closed configuration. The actuator functions by utilizing a solenoid mecha... https://www.partshnc.com/120v-nc-2pos-sr-zonevlvact