Amashanyarazi adasubira mu mashanyarazi (nanone yitwa "non-spring return" cyangwa "moteri ya damper actuator") ni igikoresho gikoreshwa muri sisitemu ya HVAC kugirango igenzure imyanya ya dampers (amasahani agenga ikirere) idafite uburyo bwubatswe mu masoko. Bitandukanye nisoko yo kugaruka kwisoko, yishingikiriza kumasoko kugirango isubire kumwanya udasanzwe (urugero, ifunze) mugihe imbaraga zabuze, abashoferi batagaruka kumasoko bafata umwanya wanyuma mugihe amashanyarazi yaciwe.

Isoko ryo kugaruka kumashanyarazi yatunganijwe kubikorwa rusange byo guhumeka ikirere, kuzenguruka valve nibindi bikoresho bisaba imikorere idahwitse. Mugihe gikora gisanzwe, moteri ikoresha moteri. Mugihe habaye umuriro w'amashanyarazi, actuator isubira kumwanya wambere.