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Retrofit actuator

AVM 322S-R

Retrofit actuator

How energy efficiency is improved

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


  • In ventilation and air conditioning units For actuation of 2- and 3-way valves

  • For controllers with constant output (0…10 V / 4…20 mA) or switching output (2-point or 3-point control)

  • BLDC motor (brushless DC) with SUT (SAUTER Universal Technology) electronic control unit of the third generation and electronic load-dependent cut-off

  • Automatic detection of applied control signal (continuous or switching), operating indicator using bi-colour LED

  • Automatic adaptation to the stroke of the valve, between 8 and 20 mm

  • Low operating noise

  • With the built-in absolute distance measurement system, the position is always maintained in the case of power failure

  • The direction of operation, characteristic (linear/equal percentage), positioning time and control signal (voltage/current) can be adjusted via coding switches

  • Integrated forced operation can be set via coding switches (with selectable direction of operation)

  • Easy re-initialisation using a coding switch

  • Crank handle for external manual adjustment with motor cut-off

  • Simple assembly onto valve; spindle is automatically connected after control voltage is applied

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

  • Electrical parallel operation of five actuators

  • Parameterisation option via the BUS interface

  • Three-piece housing made of flame-retardant yellow/black plastic and seals with type of protection IP54

  • Maintenance-free gearbox made of plastic; threaded spindle and gearbox base-plates made of steel

  • Patented actuator-valve coupling

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

  • Two break-out cable inlets for metric cable glands made of plastic M20 × 1.5

  • Fitting position vertically upright to horizontal, not suspended

  • Nominal actuating power 1000 N

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