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Siemens SFA71U Electronic Valve Actuator Tutorial


Siemens, SFA71U, Electronic Valve Actuator, Tutorial, valve, HVAC

Siemens SFA Series 2-Position Normally Closed Electronic Valve Actuator (24 Vac)


Used in heating and cooling HVAC systems, the SFA71U works with Siemens 599 Series Zone Valves.


The 24-volt SF series actuator is a 2-position normally closed electronic valve actuator that operates between 41 degrees and 122 degrees F.


It has a 10-second run time, a power consumption of 9.8 VA and requires a 24, 120, 208, or 277 VAC class-2 supply signal to control zone valves with a 1/10-inch stroke. It features direct coupled installation without tools, manual override, visual position indication, and spring return fail safe operation.

This zone valve actuator is 3-1/2” tall by 4-1/2” wide by 2-1/4” deep, weighs 1.18 lbs., and is UL listed for plenum installations.

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