Siemens GBB131.1E rotary air damper actuator AC 24 V, 3-position, 25 Nm, 150 s With self-centering shaft adapter for shaft dia. 8..25.6 mm, square 6...18 mm, min. shaft length 20 mm With position indication and adjustable mechanical limit stop Button...

Siemens GBB135.1E Rotary air damper actuator AC 24 V, 3-position, 25 Nm, 150 s, 2 auxiliary switches, potentiometer Datasheet  

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Siemens GBB336.1E rotary air damper actuator AC 230 V, 3-position, 25 Nm, 150 s, 2 auxiliary switches Datasheet