Ukufinyelela Okunwebekayo Kwamavalvu Epulasitiki

Nakuba amavalvu epulasitiki ngezinye izikhathi abonwa njengomkhiqizo okhethekile—inketho ephezulu yalabo abenza noma abaklama imikhiqizo yamapayipi epulasitiki yezinhlelo zezimboni noma okufanele babe nezinto ezihlanzekile kakhulu endaweni—ukuthatha ukuthi la mavalvu awanawo amaningi asetshenziswayo kufushane- obonayo. Eqinisweni, ama-valve epulasitiki namuhla anezinhlobonhlobo zokusetshenziswa njengoba izinhlobo ezikhulayo zezinto kanye nabaklami abahle abadinga lezo zinto zisho izindlela eziningi zokusebenzisa la mathuluzi ahlukahlukene.

IMPAHLA YE-PLASTIC
Izinzuzo zama-valve epulasitiki zibanzi-ukugqwala, ukumelana namakhemikhali nokuhuzuka; izindonga ezibushelelezi zangaphakathi; isisindo esincane; kalula ukufakwa; ubude bempilo ende; kanye nezindleko eziphansi zomjikelezo wempilo. Lezi zinzuzo ziye zaholela ekwamukelweni okubanzi kwama-valve epulasitiki ekusetshenzisweni kwezentengiselwano nezimboni njengokusatshalaliswa kwamanzi, ukwelashwa kwamanzi angcolile, ukucutshungulwa kwensimbi namakhemikhali, ukudla nemithi, izitshalo zamandla, izindawo zokuhluza uwoyela nokunye.
Ama-valve epulasitiki angenziwa ngenani lezinto ezihlukahlukene ezisetshenziswa eziningana zokucupha. Amavalvu epulasitiki ajwayelekile enziwe nge-polyvinyl chloride (PVC), i-polyvinyl chloride e-chlorinated (CPVC), i-polypropylene (PP), ne-polyvinylide fluoride (PVDF). Amavalvu e-PVC kanye ne-CPVC ajwayele ukujoyinwa ezinhlelweni zamapayipi ngokusebenzisa iziphetho zesokhethi ye-solvent, noma iziphetho ezinentambo nezine-flanged; kanti, i-PP ne-PVDF zidinga ukuhlanganiswa kwezingxenye zesistimu yamapayipi, kungaba ngobuchwepheshe bokushisa, i-butt- noma i-electro-fusion.

Nakuba i-polypropylene inengxenye yamandla e-PVC ne-CPVC, inokumelana namakhemikhali okuhlukahlukene kakhulu ngenxa yokuthi azikho izincibilikisi ezaziwayo. I-PP yenza kahle kuma-acetic acid nama-hydroxide agxilile, futhi ilungele izixazululo ezithambile zama-asidi amaningi, ama-alkali, usawoti kanye namakhemikhali amaningi emvelo.

I-PP itholakala njengento enemibala noma engenambala (yemvelo). I-Natural PP yonakaliswa kakhulu imisebe ye-ultraviolet (UV), kodwa izinhlanganisela eziqukethe ngaphezu kuka-2.5% we-carbon black pigmentation azinza ngokwanele i-UV.

Amapayipi e-PVDF asetshenziswa emisebenzini eyahlukene yezimboni kusukela kweyemithi kuye kweyezimayini ngenxa yamandla e-PVDF, izinga lokushisa elisebenzayo kanye nokumelana namakhemikhali kusawoti, ama-asidi aqinile, izisekelo ezincibilikayo kanye nezinyibilikisi eziningi eziphilayo. Ngokungafani ne-PP, i-PVDF ayonakaliswa ukukhanya kwelanga; nokho, ipulasitiki isobala ekukhanyeni kwelanga futhi ingadalula uketshezi emisebeni ye-UV. Nakuba ukwakheka kwe-PVDF kwemvelo, okungenayo i-pigmented kukuhle kakhulu ekuhlanzeni okuphezulu, ekufakweni kwasendlini, ukwengeza umbala obomvu njengombala wokudla kungavumela ukuchayeka elangeni ngaphandle komthelela omubi endaweni yoketshezi.