Ukusetshenziswa kweshidi lerabha le-asbestos embonini yokuvala ama-valve kunezinzuzo ezilandelayo:

Intengo ephansi: Uma kuqhathaniswa nezinye izinto zokuvala ezisebenza kahle kakhulu, intengo yeshidi lerabha le-asbestos lithengeka kakhulu.

Ukumelana namakhemikhali: Ishidi lerabha le-asbestos linokumelana nokugqwala okuhle kokuphakathi nendawo enezakhiwo zamakhemikhali ezithambile, ezingahlangabezana nezidingo zezimo zokusebenza ezijwayelekile.

Ukugcinwa okulula: Ngenxa yokuthi ishidi lerabha ye-asbestos kulula ukulicubungula nokufaka esikhundleni, lilungele ukugcinwa kwe-valve.

Inkinga enkulu yeshidi lenjoloba ye-asbestos yukuthi nakuba impahla ye-gasket yengezwe nge-raber nezinye izihlungi, isakwazi ukugcwalisa ngokuphelele ama-pores amancane axhuma, futhi kukhona ukungena kokulandela. Ngakho-ke, endaweni engcolisa kakhulu, ngisho noma ingcindezi nezinga lokushisa lingekho phezulu, azikwazi ukusetshenziswa. Uma isetshenziswa kweminye imithombo yezindaba kawoyela enezinga eliphezulu lokushisa, imvamisa esikhathini sakamuva sokusetshenziswa, ngenxa ye-carbonization yenjoloba ne-filler, amandla ayancishiswa, impahla iyaxega, futhi kukhona ukungena esibonakalayo nangaphakathi kwe-gasket, futhi kukhona ukupheka nokubhema. Ukwengeza, ishidi lenjoloba ye-asbestos liboshwe kalula endaweni yokuvala i-flange ekushiseni okuphezulu, okuletha izinkinga eziningi esikhundleni se-gasket.

Esimweni esishisayo, ukucindezelwa kwe-gasket emithonjeni ehlukahlukene kuncike esilinganisweni sokugcina amandla we-gasket material. Kunamanzi ayikristalu namanzi adsorbed ku-asbestos fiber material. Ku-110 ℃, u-2/3 wamanzi adsorbed phakathi kwemicu seye wanetha, futhi amandla aqinile emicu ancipha cishe ngo-10%. Ku-368℃, wonke amanzi adsorbed ayaphuma, futhi amandla aqinile efayibha ancipha cishe ngo-20%. Ngaphezu kuka-500 ℃, amanzi ayikristalu aqala ukushona phansi, futhi amandla aphansi.

Ishidi lenjoloba ye-Asbestos liqukethe ama-ion e-chloride ne-sulfide, kulula ukwenza amaseli e-galvanic agqwalile anama-flange ensimbi ngemva kokumuncwa kwamanzi, ikakhulukazi okuqukethwe kwesibabule kweshidi lerabha le-asbestos elingamelana nowoyela kuphakeme izikhathi eziningana kuneshidi lerabha le-asbestos elivamile, ngakho alifaneleki. ukusetshenziswa emithonjeni engamafutha. Ama-gaskets azogcwala uwoyela nemidiya encibilikayo, kodwa phakathi kwebanga elithile, awukho umthelela ekusebenzeni kokuvala.

Kodwa-ke, kubalulekile ukuqaphela ukuthi i-asbestos ikhonjwe njengento eyingozi, futhi ukusetshenziswa kwamashidi enjoloba ye-asbestos kungase kuveze izingozi ezingaba khona empilweni nasemvelweni.