Siemens SSC81.5U (S55155-A109) Valve Actuator, Powermite MT Series actuator, 24 Vac, floating control with spring return. Works with MT Series valves with 7/32-inch (5.5mm) stroke. UL listed for plenum installations, manual override with visual position indication. Provides 65 lb. (300 N) nominal force.
Actuator Type: Electronic
Actuation Style: Linear
Fail Safe: Yes, Spring Return
Control Signal: Floating
Ambient temperature, operation: 41…122 ºF (5…50 °C)
Ambient humidity, operation: 90 % r.h.
Supply Voltage: 24 VAC
Degree of protection: NEMA1 / IP40
David Marks –
Siemens SSC81.5U is one of the best valve actuators in the market. Works great with the Powermite series globe valves. Great performance… excellent price.