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SUT valve actuator with spring return

AVF 125S

SUT valve actuator with spring return

How energy efficiency is improved

Electric cut-off and self-adjustment to save energy


  • Activation of 2-way and 3-way valves of the VUN/BUN, VUD/BUD and VUE/BUE series

  • For controllers with switching (2- and 3-point) or continuous output (0…10 V, 4…20 mA)

  • Spring return moves the unit to the end position in the event of a power failure or when a limit controller is activated

  • Stepping motor with SAUTER Universal Technology (SUT) electronic control unit and electronic, force-dependent cut-off

  • Automatic recognition of applied control signal (continuous or switched)

  • Coding switches for selecting characteristic and running time

  • Type of characteristic (linear/quadratic/equal-percentage) can be set on the actuator

  • Direction of operation can be selected via screw terminals when making the electrical connection

  • Maintenance-free gear unit

  • LED display

  • Electrical connections (max. 1.5 mm²) with screw terminals

  • Cable inlet M20 × 1.5

  • Fitting vertically upright to horizontal, not suspended

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