Siemens SFA71U 2 Posistion S/R Zone Valve Actuator N/C 24V

The Siemens SFA71U is a sturdy 2-position zone valve actuator meant for use in HVAC systems. This actuator is a spring-return type, and it uses a 24V power supply; the function is normally closed (N/C) to meet different application requirements. The Siemens SFA71U is designed for the accurate control of zone valves with a 2-position, spring-return mechanism for reliable valve action. The N/C or normally closed actuator is designed to be in the closed position unless triggered by a control signal this makes it suitable for applications where safety is paramount.