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STB21
AC 230 V, drive open/spring closed actuator for VVG45 and VXG45 valves
Old - No longer available
Siemens STB21
AC 230 V, drive open/spring closed actuator for VVG45 and VXG45 valves. Replacement unit SAS31.00 requires an ASK30 adapter when used with the existing valve. Info: An additional wire is also required to drive the valve actuator closed.
Replacement: SAS31.00
Please check the technical data of the replacement product exactly, a 1: 1 replacement is not always possible.
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