Kufotokozera Kwachidule:

Valavu yotulutsa mpweya yophatikizika yothamanga kwambiri imakhala ndi magawo awiri: Vavu yotulutsa mpweya yothamanga kwambiri ya diaphragm komanso valavu yotulutsa mpweya yotsika. Mpweya wothamanga kwambiri umatulutsa mpweya wochepa womwe umakhala mkati mwa chitoliro mopanikizika. Valve yotsika ya mpweya imatha kutulutsa mpweya mu chitoliro pamene chitoliro chopanda kanthu chimayikidwa ndi madzi, ndipo chimatseguka chokha ndikulowetsa mpweya mu chitoliro kuti chichotse mpweya pamene chitoliro chatsanulidwa kapena kupukuta kapena pansi pa ...