Kugwiritsa ntchito pepala la rabara la asbestos mumakampani otsekera ma valve kuli ndi zabwino izi:

Mtengo wotsika: Poyerekeza ndi zipangizo zina zotsekera zomwe zimagwira ntchito bwino, mtengo wa pepala la rabara la asbestos ndi wotsika mtengo.

Kukana mankhwala: Pepala la rabara la asbestos lili ndi kukana dzimbiri kwa zinthu zina zomwe zimakhala ndi mankhwala ochepa, zomwe zingakwaniritse zosowa za zinthu zonse zogwirira ntchito.

Kukonza kosavuta: Popeza pepala la rabara la asbestos ndi losavuta kukonza ndikusintha, ndi losavuta kusamalira valavu.

Vuto lalikulu la pepala la rabara la asbestos ndilakuti ngakhale kuti zinthu za gasket zimawonjezeredwa ndi rabara ndi zodzaza zina, sizingathe kudzaza kwathunthu pores ang'onoang'ono omwe amalumikizana, ndipo pali malo olowera pang'ono. Chifukwa chake, m'malo oipitsa kwambiri, ngakhale kupanikizika ndi kutentha sikokwera, sizingagwiritsidwe ntchito. Zikagwiritsidwa ntchito m'malo ena otentha kwambiri amafuta, nthawi zambiri pakapita nthawi yogwiritsidwa ntchito, chifukwa cha kaboni wa rabara ndi chodzaza, mphamvu zimachepa, zinthuzo zimakhala zomasuka, ndipo pali malo olowera mkati ndi mkati mwa gasket, ndipo pali coking ndi utsi. Kuphatikiza apo, pepala la rabara la asbestos limalumikizidwa mosavuta pamalo otsekereza a flange kutentha kwambiri, zomwe zimabweretsa mavuto ambiri pakubwezeretsa gasket.

Mu kutentha, kuthamanga kwa gasket m'njira zosiyanasiyana kumadalira kuchuluka kwa mphamvu ya gasket. Pali madzi a kristalo ndi madzi otengedwa mu ulusi wa asbestos. Pa 110℃, 2/3 ya madzi otengedwa pakati pa ulusiwo yachepetsedwa, ndipo mphamvu yokoka ya ulusiyo yachepetsedwa ndi pafupifupi 10%. Pa 368℃, madzi onse otengedwa amatuluka, ndipo mphamvu yokoka ya ulusiyo imachepetsedwa ndi pafupifupi 20%. Pamwamba pa 500 ℃, madzi a kristalo amayamba kugwa, ndipo mphamvu imakhala yotsika.

Pepala la rabara la asbestos lili ndi ma ayoni a chloride ndi sulfide, maselo a galvanic osavuta kupanga dzimbiri okhala ndi zitsulo zozungulira pambuyo poyamwa madzi, makamaka kuchuluka kwa sulfure mu pepala la rabara la asbestos losagwira mafuta kumakhala kokwera kangapo kuposa pepala wamba la rabara la asbestos, kotero siliyenera kugwiritsidwa ntchito pazinthu zopanda mafuta. Ma gaskets amadzaza mu mafuta ndi zosungunulira, koma mkati mwa malire ena, palibe chomwe chimakhudza magwiridwe antchito otseka.

Komabe, ndikofunikira kudziwa kuti asbestos yadziwika kuti ndi chinthu choopsa, ndipo kugwiritsa ntchito mapepala a rabara a asbestos kungayambitse zoopsa pa thanzi ndi chilengedwe.