Ipuleti lesihlungi se-diaphragm lakhiwe ama-diaphragm amabili kanye nepuleti eliyisisekelo elihlanganiswe nokuvalwa kokushisa okuphezulu.
Lapho imidiya yangaphandle (njengamanzi noma umoya ocindezelweyo) ingeniswa ekamelweni phakathi kwepuleti eliwumgogodla kanye ne-membrane, i-membrane izobe iqhume futhi icindezele ikhekhe lokuhlunga ekamelweni, ifinyelele ukukhishwa kwe-extrusion yesibili yekhekhe lokuhlunga.