Iyo diaphragm sefa ndiro inoumbwa nemadiaphragms maviri uye core plate yakasanganiswa nepamusoro-tembiricha yekuisa chisimbiso.
Kana midhiya yekunze (senge mvura kana mhepo yakamanikidzwa) inounzwa mukamuri pakati peiyo core plate uye membrane, membrane ichaputirwa uye kudzvanya keke yekusefa mukamuri, ichiwana chechipiri extrusion dehydration yekeke resefa.