Siemens SFA71U Zone Valve Electric Actuator Review
2014-11-12 84 Dailymotion
<B>Siemens SFA71U Zone Valve Electric Actuator Review</b><P>http://is.gd/eKF0gL <P><P> Siemens SFA71U Zone Valve Electric Actuator <P>Fail-safe (spring return)<P>Normally closed<P>2-position control<P>UL listed for plenum installations<P>
