Manufacturer Name: Siemens Building Technology Product Number: SFA71U OEM Part Number: SFA71U The Siemens SFA71U is a robust 2-position zone valve actuator designed for efficient operation in HVAC systems. This spring-return actuator operates on a 24V power supply and features a normally closed (N/C) function, ensuring reliable performance in various applications. The Siemens SFA... https://www.partshnc.com/24v-nc-2pos-sr-zonevlvact