Chemical process
M'mafakitale omwe ali ndi liwiro lalikulu, ndende yafumbi, kutentha kwambiri komanso kuwononga kwambiri, ndikosavuta kuwononga zisindikizo za rabara ndi zida zomata za mavavu okhala ndi zisindikizo zofewa.Chifukwa chake, pamafunika ma valve omwe amapangidwa ndi chitetezo chosayerekezeka komanso kukana.Mavavu a COVNA PTFE amawongolera zida zosindikizira zomwe zilipo ndikuwonjezera moyo wawo wautumiki.Takhala tikupanga mavavu omwe amatha kuthana ndi zovuta kwambiri zopangira mankhwala kwazaka zambiri.