The New Safety Valve Against Unintended Car Movement DSV-A3

Safety valve (additional to the lift valve) to protect against unintended downward car movement as per EN 81-2:2010 (A3).




  • Complies, together with appropriate door movement sensors and control system elements, with the requirements of the standard for a “means” of protection
  • Must be built into any new system after 2012
  • Type-examination certified by TÜV SÜD
  • Compatible with control valves from any manufacturer
  • incl. ball valve


  • with electrical emergency lowering: 12 VDC or 24 VDC
  • withouth ball valve (for modernisations)

Appropriate control system 

To the "means" the standard requires does not only the DSV-A3 belong, but a sensor unit that detects unintended movement of the car, and a controller that processes the signal and interrupts the power supply. Most manufacturers controllers meet the standards needs by now. You can contact them directly to this matter.



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