Home  »  Products  »  IECEx/ ATEX actuators zone 1  »  NEx-V Linear actuator

NEx-V Linear actuator

The NEx-V linear actuator for Ex zone applications is a further development of the flameproof housing of the NEx rotary and part-turn actuator with Ex Zone 1 marking CE2004 EX II 2G Ex d IIC T6 Gb, based on IECEx certification IECEx EPS 15.0061X and ATEX certification EPS 15 ATEX 1 044 X and the linear unit of the V actuator.

NEx-V series linear actuators are used when precise linear adjustments are required to control elements in heating, ventilation and air conditioning systems as well as in industrial applications. NEx-V series linear actuators are available with actuating forces of 400 N - 5000 N and a maximum stroke of 85 N.

Back to product overview
[Translate to English:] NEx-V Linearantrieb
[Translate to English:] NEx-V Linearantrieb


  • Housing and hood are made of corrosion-resistant gravity die-cast aluminium
  • Coating with silicone-free paint
  • olour RAL 7032 Pebble Grey
  • The motor compartment is designed as a type “d” flameproof enclosure to DIN EN 60079-1
  • Degree of protection IP66/67
  • Options:
    • Custom colours

Synchronous motor

  • Single-phase AC synchronous motor with permanent magnets, reversible
  • 230 V ± 10%, 50/60 Hz ± 5 %
  • ON time 100% duty cycle on request
  • Short start/stop times
  • Insulation class B to VDE 0530
  • Synchronous motors maintain speed and positioning time irrespective of the load
  • Options:
    • Custom voltages
    • Custom frequencies

BLDC motor

  • Brushless DC motor
  • Constant positioning time thanks to electronic speed controller
  • Wide-range voltage input 90 V AC … 264 V AC, 120 V DC … 370 V DC
  • High holding torque when the operating voltage is applied
  • Manufacturer configured start-up and brake ramp
  • ON time 100% duty cycle
  • Insulation class E to VDE 0530

DC motor

  • DC commutator motor
  • Voltage 12 V DC or 24 V DC
  • Insulation class E to VDE 0530


  • Spur gearing with straight-toothed steel gears
  • Rugged, maintenance-free
  • Permanently lubricated gears
  • Self-lubricating sintered bronze bearings
  • Encapsulated version, operates in any position

Stroke unit

  • Fixing bracket made of die-cast aluminium
  • Spindle made of stainless steel
  • Spindle self-locking
  • Needle bearings to absorb axial forces
  • Steel and bronze materials for good anti-seizure properties


  • Self-locking
  • “Open/closed” markings indicate position
  • Made of stainless steel

Electrical connection

  • Connection by means of 1 m cable end or Ex “e” rated terminal box with spring-loaded terminals
  • Customer-side wiring outside of the flameproof housing
  • Electric anti-condensate heater
  • Manual reset temperature switch 80 °C/li>


  • Open/close signal
  • Options:
    • Additional potential-free contacts
    • Electronic position controller ESR-N with Profibus and USB interface for synchronous motors
    • Potentiometer 200Ω … 10 kΩ
    • BBlocking protection by monitoring changes to the actual value of the potentiometer (only in conjunction with position controller ESR-N)

Ambient temperature

  • -20 °C to +60 °C

Angle of rotation limited by snap-action position off switch

  • Changeover switches with silver-plated contacts
  • Switch connections routed to terminals
  • Switching capacity: max. 6 A, 250 V AC
  • Options:
    • Switches with gold-plated contacts
    • Switches with positive-break contacts

Position sensor for external position indication (optional)

  • With potentiometer
    • Conductive plastic potentiometer (standard) or wire-wound potentiometer (including TÜV approval)
    • Multiturn potentiometer up to 10 turns
    • Gearing makes it easier to adapt the electrical angle of rotation of the potentiometer to the desired angle of rotation of the actuator
    • Special potentiometers with TÜV-approved form-fit attachment solution are available for electronic fuel/air ratio control
  • With 4 ... 20mA transmitter
    • Gearing makes it easier to adapt the electrical angle of rotation of the transmitter to the desired angle of rotation of the actuator
  • With Hall sensor
    • The wear-free absolute encoder that makes use of the Hall effect is particularly suitable for continuous operation in potentially explosive atmospheres

Manual operation (optional)

  • The position of the input shaft and valves can be moved manually using a handwheel
  • Disengaging the gear train and motor reduces the amount of force required
  • Position switch-off settings are retained during manual operation
  • The handwheel remains motionless during electrically powered operation


  • Other voltage/frequency
  • Handwheel
  • Additional auxiliary position switches
  • Custom control cams
  • Electronic position controller ESR-N (in conjunction with synchronous motor)
  • Position sensor
  • Relay for switching several actuators in parallel
  • Potentiometer
  • Components to UL standard
  • Spindle protected by bellows
  • Set collars serve as external travel stops


  • Easily mounted thanks to stable cast angle bracket and steel angle section attached to housing
  • Connecting pin supplied to connect spindle with valve
  • No-fuss coupling to valve stem by means of:
    • Lever arm, clamping lever, ball-and-socket joint, connecting rods, sprung connecting rods

Safety instructions

  • In a potentially explosive area, ensure the device is isolated from the power supply before the hood of the flameproof encapsulated housing is opened by a specialist. The waiting time specified on the rating plate must always be observed!


Switches for series

Switches for series

  • Contact material: Silver
  • Max. switching capacity: 6 A, 250 V AC
  • Positive-break switches (optional)
  • Gold contacts for switching smallest loads (optional)


  • All switch contacts routed to terminals
  • Switching angles infinitely adjustable by means of cams
  • Retrofit switch sets available
  • Changeover contact (SPDT)

For actuators: N, NV, NE, K, KA, V




  • Adjustable cam that can be adjusted from above, consisting of brass body and plastic cam ring
  • Different cam shapes available

For actuators: N, K, KA, V, NV, NEx

Download Datasheet




  • Adjustable cam that can be adjusted from the side, consisting of plastic body and plastic cam ring
  • Grub screw ensures cam is reliably secured to the shaft
  • Different cam shapes available

For actuators: N, K, KA, V, NV, NEx

Download Datasheet


Brass cam

Brass cam

All actuators

  • High quality control cam made of brass
  • Three grub screws ensure the cam is very reliably secured to the shaft
  • Different cam shapes available

Download Datasheet