Pali mitundu yosiyanasiyana ya zida zofewetsa madzi, zomwe zitha kugawidwa m'mitundu yosinthira ion ndi mtundu wolekanitsa wa membrane.Zida za Toption Machinery ndi mtundu wa ion wosinthanitsa womwe ulinso wofala kwambiri.Zida zamadzi zofewetsa za ion zimapangidwa makamaka ndi kusefera kwa pretreatment, thanki ya resin, makina owongolera okha, makina opangira mankhwala ndi magawo ena.