Siemens SFA Series 2-Position Normally Closed Electronic Valve Actuator (120 Vac)

The SF Series actuator requires a 24 Vac, 120 Vac, 208 Vac, or 277 Vac Class-2 supply signal to control Siemens Zone Valves with a 1/10-inch (2.5 mm) stroke. For use in heating and cooling HVAC applications with Siemens 599 Series Zone Valves that need 24 lb (105N) nominal force. Features: UL listed for plenum installations Direct coupled installation without tools Manual override Visual position indication Spring return fail safe operation