When Stack effect wind issues are a problem, AVT’s CTSpirator will help overcome.

Same look, same size. New Springs for Constant Torque throughout door travel.

elevator structural components


  • Constant torque

  • Eliminates stack effect

  • Accommodates heavy doors

Performance Data

Tested cycles: 1,002,163

Balanced thru cycle

1 wrap = 3.5 to 3.6 lbs

15 wrap = 18 to 18.7 lbs

Elevate to the Next Level

Contact our team to discuss your bespoke elevator design,
modernisation, or service needs.