Pneumatic tubing run lengths.

The maximum 925 tubing run length from the Control Box to the Door Closer is:

  •  7980 Series Control Boxes --- 50 "Linear" feet from Control Box to Door Closer.
  •  7900/7940 Series Control Boxes --- 100 "Linear" feet from Control Box to Door Closer, and 500 "Linear" feet from the Control Box to the External Compressor.

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