Electric linear actuators for modulating and open-close duty with fail-safe position during power failure. The thrust rod is either retracted or extended for emergency setting function. The required energy is permanently stored in a spring stack and transmitted to the thrust rod in the event of power failure.


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TypeNR 2.1NR 2.2NR 2.3
Positioning force 0.9 kN 2.2 kN 2.2 kN
Nominal stroke 35 mm 35 mm 46 mm
Running speed 18 mm/min
Blocking-resistant synchronous motors ensure highest positioning accuracy.
Safe operation and reduced maintenance requirements due to mechanical system without hydraulic fluid.
Insensitive to temperature fluctuations.
Electric manual operation via OPEN / CLOSE contacts in the actuator.
TÜV [German Technical Control Board] Test according to DIN 14597 as actuator for water and steam with fail-safe function in heating facilities.
Additional limit switches/gold-plated contacts as an option
Electronic position transmitter ESR 100, output 0…10 V / 0 (4)…20 mA
Electronic position regulator PEL 100, input 0…10 V / 0 (4)…20 mA
Profibus module PBD 100