Fundo: ni kuphatikizapo nchito yakudunjika na fundo yakuyezgayezga, apo palije mphambano ya nkhongono pakati pa msewu wakunjilirapo na wakufumiramo, pamanyuma pa nkhongono, nkhongono ya electromagnetic mwaluŵiro ku vavu yichoko ya ndege na vavu yikuru ya valve yakujalika mu nyengo yakuwonekera, valve yikujulika.
Para inlet na kufumamo kuyamba mphambano ya kupanikizgika, pamanyuma pa nkhongono, nkhongono ya electromagnetic iyo yikuyezga vavu yichoko, nkhongono ya pasi ya vamber ya valve yikuru yikukwera, nkhongono ya mphamvu ya pachanya yikukhira, mwakuti yigwiriskirenge nchito mphambano ya kupanikizika kuti yikankhira valve yikuru pachanya; Para nkhongono zazima, valve yakuyezga yikugwiriskira ncito nkhongono ya spring panji kucicizga kwapakati kuti yikankhire cigaŵa cakujalira, yikwenda pasi, mwakuti valve yijalike.
