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SUT valve actuator with spring return

AVF 234S

SUT valve actuator with spring return

How energy efficiency is improved

Automatic adaptation to valve, precision activation and high energy efficiency with minimal operating noise


  • Activation of 2-way and 3-way valves of the VQD/BQD, VQE/BQE, VUG/BUG, VUP, VUS/BUS and V6R/B6R series

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

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

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

  • Simple assembly with valve; spindle is automatically connected after control voltage is applied (patented system)

  • Automatic detection of applied control signal (constant or switched); indicated by two LEDs

  • Coding switches for selecting characteristic and running time

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

  • Automatic adaptation to the stroke of the valve (min. valve stroke 8 mm, max. valve stroke 49 mm). The measured stroke is saved and is not lost even in the event of a power failure

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

  • Crank handle for external manual adjustment with motor cut-off and as trigger for a re-initialisation

  • Numerous adapters enable the unit to be fitted onto non-SAUTER valves

  • Power supply 230 V with module or direct connection for 24 VAC or 24 VDC; continuous activation also admissible with 230 V

  • Maintenance-free gear unit made of sintered steel; gearbox base-plate made of steel

  • Spring pack and mounting column made of stainless steel; mounting bracket made of cast light alloy for valve fitting

  • Electrical connections (max. 2.5 mm²) with screw terminals

  • Three pre-scored cable inlets for M20 × 1.5 (2×) and M16 × 1.5

  • Fitting vertically upright to horizontal, not suspended

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