Ivalvu yebhabhathane ehleli kwirabha ene-EPDM Sealing: Isishwankathelo esipheleleyo

**Iivalufa zebhabhathane ezihlala ngerabha ezinezitywino ze-EPDM: isishwankathelo esipheleleyo**

Iivalvu zebhabhathanezizinto ezibalulekileyo kwizicelo ezahlukeneyo zoshishino, zibonelela ngolawulo olusebenzayo lokuhamba kwamanzi kwimibhobho. Phakathi kweentlobo ezahlukeneyoiivalvu zebhabhathane, iivalvu zebhabhathane ezihleli ngerabha ziyabonakala ngenxa yoyilo lwazo olukhethekileyo kunye nokusebenza kwazo. Enye yezona zinto ziphambili kolu didi kukusetyenziswa kwee-seal ze-EPDM (ethylene propylene diene monomer), eziphucula ukusebenza kunye nokuqina kwevalvu.

Iiseal ze-EPDM zaziwa ngokuxhathisa kwazo ubushushu, i-ozone kunye nemozulu, nto leyo eyenza ukuba zibe zilungele ukusetyenziswa ezifuna ukuvalwa okuthembekileyo kwiimeko ezinzima. Xa zidityaniswe kwiivalvu zeebhabhathane ezihleli ngerabha, iiseal ze-EPDM zivala kakuhle, zinciphisa umngcipheko wokuvuza kwaye ziqinisekise ulawulo olufanelekileyo lokuhamba kwamanzi. Oku kubaluleke kakhulu kumashishini afana nonyango lwamanzi, ukucubungula iikhemikhali kunye neenkqubo ze-HVAC, apho ukugcina ukuthembeka kwenkqubo kubaluleke kakhulu.

Iivalvu zebhabhathane ezihleli ngerabhangee-seal ze-EPDM zibonelela ngeenzuzo ezininzi. Okokuqala, izinto ze-EPDM zinokumelana nobushushu obubanzi, obuqhele ukuba yi-40°C ukuya kwi-120°C, nto leyo eyenza ukuba zifaneleke zombini ukusetyenziswa okushushu nokubandayo. Okwesibini, ukuguquguquka kwesihlalo serabha kuvumela ukusebenza kakuhle, kunciphisa i-torque efunekayo ukuvula nokuvala ivalvu. Olu phawu alugcini nje ngokuphucula amava omsebenzisi, kodwa lukwandisa ubomi bendibano yevalvu.

Ukongeza, uyilo olukhaphukhaphu lwevalvu yebhabhathane, kunye nesitywina sayo se-EPDM esomeleleyo, kuvumela ukufakwa nokugcinwa okulula. Abasebenzisi banokutshintsha isitywina ngokukhawuleza ngaphandle kwesidingo sezixhobo ezikhethekileyo, ukuqinisekisa ukuba ixesha lokungasebenzi lincinci.

Ukuqukumbela, iivalvu zeebhabhathane ezihlala ngerabha ezineetywina ze-EPDM zimele ubuchule obubalulekileyo kubuchwepheshe bokulawula ukuhamba kwamanzi. Ukuqina kwazo, ukumelana neemeko zokusingqongileyo kunye nokulula kokugcinwa kwazo kuzenza zibe lolona khetho luphezulu kwiintlobo ngeentlobo zezicelo zoshishino. Njengoko ishishini liqhubeka nokutshintsha, imfuno yezisombululo zeevalvu ezithembekileyo nezisebenzayo ngokuqinisekileyo iya kukhula, ngaloo ndlela idibanisa indima yeevalvu zeebhabhathane ezivaliweyo ze-EPDM kubunjineli banamhlanje.