Ipleyiti yokucoca i-diaphragm yenziwe ngama-diaphragm amabini kunye nepleyiti engundoqo edityaniswe nokutywinwa kobushushu obuphezulu.
Xa imidiya yangaphandle (njengamanzi okanye umoya oxinyiweyo) ingeniswe kwigumbi phakathi kweplate engundoqo kunye ne-membrane, i-membrane iya kukhutshwa kwaye icinezele ikhekhe lokucoca kwigumbi, ukufezekisa ukuchithwa kwesibini kwe-extrusion dehydration yekhekhe lokucoca.