Makhalidwe olowera ndi otulutsa a vacuum booster. Pali malo olowera pa curve iliyonse yogwirizana ndi madigiri osiyanasiyana a vacuum pachithunzichi, otchedwa malo owonjezera mphamvu yothandizira, kutanthauza kuti, malo omwe kusiyana kwa kuthamanga komwe kumagwira ntchito pa servo diaphragm kumafika pachimake pamene mphamvu yolowera ikukwera. Kuyambira pano kupita mtsogolo, kuwonjezeka kwa mphamvu yotulutsa kumakhala kofanana ndi kuwonjezeka kwa mphamvu yolowera.
Malinga ndi QC/T307-1999 "Zofunikira paukadaulo wa vacuum Booster", kuchuluka kwa vacuum komwe kumachokera pa vacuum panthawi yoyeserera ndi 66.7±1.3kPa (500±10mmHg). Makhalidwe olowera ndi otuluka a vacuum booster amatsimikiziridwa kale ndi njira yowerengera. Malinga ndi mfundo yogwirira ntchito ya vacuum booster, magawo awiri a khalidwe pa curve ya khalidwe akhoza kuyerekezeredwa: mphamvu yolowera yofanana ndi mphamvu yayikulu ndi kuchuluka; Chiŵerengero cha mphamvu yotuluka ndi mphamvu yolowera isanafike mphamvu yayikulu, yomwe ndi chiŵerengero cha mphamvu.
