In addition to the seals, the spiral cable and the pneumatic switch are also important parts of the safety strip on industrial doors. Just like the seals, signs of wear and tear can occur here, which indicate that replacement is necessary.
Any corrosion on the contacts of the pneumatic switch should be prevented at an early stage, otherwise there is the risk of system failure or accident.
Excessive abrasion, twisting or stretching, and age-related hardening are the most common causes of wear and tear on the coiled cable. These are clear signs that a replacement is urgently needed.