Isekhethi yokuphefumula yomshini wokulalisa izinzwa kanye ne-ventilator yakhiwe ngokuhlanganyela, okuhlangene okunendlela-ntathu kanye nezifutho. Inhlanganisela yenziwe nge-high-density polyethylene resin material ngokusho kwe-GB11115, kanti izifutho zenziwe ngezinto ezithambile ze-PVC zezokwelapha ngokusho kwe-GB10010. Ihlukaniswe ngezinhlobo ezintathu zokucaciswa.Ukugeleza okulinganiselwe kwesekethe yokuphefumula: 30L/min, ukukhuphuka kokucindezela kungabi ngaphezu kuka-0.2KPa, isifunda sokuphefumula kufanele sibe yi-aseptic.