I-actuator ye-damper yombane engeyo-spring return (ekwabizwa ngokuba yi-"non-spring return" okanye "i-motorized damper actuator") sisixhobo esisetyenziswa kwiinkqubo ze-HVAC ukulawula indawo yee-dampers (iipleyiti ezilawula ukuhamba komoya) ngaphandle kwendlela yentwasahlobo eyakhelwe ngaphakathi. Ngokungafaniyo nee-actuators ze-spring return, ezixhomekeke kwi-spring ukuba zibuyele kwindawo emiselweyo (umz., ivaliwe) xa umbane ulahlekile, ii-actuators ze-non-spring return zibamba indawo yazo yokugqibela xa umbane unqunyulwe.

Ii-actuator ze-Spring Return damper zenzelwe ukusetyenziswa kwe-air damper ngokubanzi, i-rotary valve kunye nezinye izixhobo ezifuna umsebenzi okhuselekileyo. Ngexesha lokusebenza okuqhelekileyo, i-actuator iqhuba isixhobo ngemoto. Kwimeko yokucima kombane, i-actuator ibuyela kwindawo yayo yokuqala.