Nano + Ex 1

Electro-mechanical actuator for Ex-Zone 1

Classic drive technology in a rugged housing with compact dimensions. ARIS actuators of the series Nano+ Ex designed for industrial use in zone 1 areas. They are used for the actuation of regulating and shut-off devices, e.g. flaps, valves, ball valves, dosing pumps etc., and offer a high safety level. The classic drive technology of the Nano+ with synchronous or direct current motor allows a simple replacement of actuators in existing circuits and systems. The large number of mounting holes according to ISO 5211 and a change-over shaft system ensure a simple construction on all standard fittings without costly brackets. The drives of Zone 1 are characterized by a high level of intrinsic safety and operational safety.




Actuating time



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Single component or complete unit.

  • Drive

    Synchronous motor technology (AC) or direct current motor (DC)

    • The permanent magnets built into the synchronous motor ensure a high holding torque even in a de-energized condition (AC)

    • The motor speed depends solely on the voltage frequency. Therefore a constant and load-free actuating time is ensured.

  • Cutoff

    Classic shut-off system via switching cams and micro switches

    • No voltage supply necessary for position indication and shut-off. Nano actuators are 100% connection compatible to ARIS actuators sold before 2014; perfectly suitable as exchange actuators.

    • Tool-free adjustable aluminum switching cams allow a fast and exact actuator setup.

    • Additional fixation possible with TufLok threaded pins in the cam.
  • Mechanical data

    Robust aluminum housing

    • For usage in rough industrial environment; high operational safety.

    • Impact-resistant cover protects reliably all functional parts and serves as optimal isolation of the electric components; high operational safety.

    • Variety of standard retaining bores, incl. ISO 5211, allow an easy adaption of nearly all valves without expensive mounting brackets.

    • The compact design allows usage even in constricted spaces.

    • Short delivery times of special adaptions by a special changeable shaft system.

  • Potentiometer


    • Optional potentiometers allow continuous feedback of the current drive position.
    • The potentiometer automatically adjusts itself to the travel range by means of a slip clutch integrated into the potentiometer.
    • Various variants allow optimum utilization of the entire potentiometer range:
      Nano+ S 90 ° / 180 ° / 320 °, Nano+ M 20 … 40 Nm 90 ° / 160 °, Nano+ M 40 … 60 Nm 90 °, Nano+ L 90 ° / 180 ° / 320 °.
  • EX specifications

    • Can be used in Zone 1 and Zone 2Device categories 2G and 3G
    • Pressure-proof encapsulation “d”
    • Applicable to gases with increased ignition breakdown capability “C”
    • Highest temperature class T6
    • For gases from ignition temperature> 85 ° C

Housing aluminum/steel

Pressure-proof encapsulation


Drive Nano+

Types S/M/L


Customized shaft

Specifications part-turn actuator Nano+ Ex
Nano+ Ex (Zone 1)
MotorSynchronous motor, short-circuit proof / DC motor (Option 24 V DC)
Protecion classIP 65
EX-Protection class Ex II 2G Ex d IIC T6 Gb (Ex-Zone 1)
Ambient temperature–20 °C…+60 °C
HousingPressure-proof encapsulated (Aluminum, steel)
Down shaft1.4021
Power supply230 V AC
(optional 115 VAC / 24 VAC / 24VDC)
Additional switchesUp to 4 pcs (optional)
TravelNano S: 10°…330°
Nano M: Up to 40 Nm: 10°…165°
Nano M: 40…60 Nm: 10°…110°
Nano L: 70…120 Nm: 10°…330°
(Multi-turn optional)
Duty cycle 100%
Connection1x M20x1.5 or 1x M20x1.5 + 1x M16x1.5 (Zone 1)
Travel cutoffSwitching cams/micro switches
MaintenanceLifetime lubrication (maintenance-free)
Optional position controller PMR