A non-spring return electric damper actuator (inonziwo "non-spring return" kana "motorized damper actuator") chishandiso chinoshandiswa mumasisitimu eHVAC kudzora nzvimbo yemadampers (airflow-regulating plates) isina yakavakirwa-mukati chitubu michina. Kusiyana nechirimo chekudzoka actuators, iyo inotsamira pachitubu kuti idzokere kune yakasarudzika chinzvimbo (semuenzaniso, yakavharwa) kana simba rarasika, vasiri-spring return actuators vanobata chinzvimbo chavo chekupedzisira kana simba rachekwa.

Spring Return damper actuators akagadzirirwa general air damper application, rotary valve uye zvimwe zvishandiso zvinoda kutadza-kuchengetedza basa. Panguva yekushanda kwakajairika, actuator yakafambisa mudziyo. Muchiitiko chekudzima kwemagetsi, actuator inodzokera kunzvimbo yayo yekutanga.