Amavalvu ebhola e-PVC (PolyVinyl Chloride) asetshenziswa kakhulu amavalvu epulasitiki avaliwe. I-valve iqukethe ibhola eliphendukayo elinebhore. Ngokuzungezisa ibhola ukuphenduka kwekota, ibhore ingaphakathi noma i-perpendicular kumapayipi futhi ukugeleza kuyavulwa noma kuvinjwe. Ama-valve e-PVC aqinile futhi ayabiza. Ngaphezu kwalokho, zingasetshenziselwa imidiya ehlukahlukene, kuhlanganise namanzi, umoya, amakhemikhali abolayo, ama-asidi nezisekelo. Uma kuqhathaniswa nama-valve ebhola ethusi noma ensimbi engagqwali, alinganiselwe amazinga okushisa aphansi nezingcindezi futhi abe namandla aphansi emishini. Atholakala ngokuxhunywa kwamapayipi ahlukene, njengamasokhethi e-solvent (uxhumano lweglue) noma izintambo zamapayipi. Inyunyana ephindwe kabili, noma ama-valve amayunithi eqiniso, aneziphetho ezihlukene zamapayipi ezixhunywe kumzimba wevalvu ngoxhumano oluluchungechunge. I-valve ingasuswa kalula ukuze ishintshwe, ihlolwe futhi ihlanzwe.
Ukukhiqizwa kwe-PolyVinyl Chloride
I-PVC imele i-PolyVinyl Chloride futhi iyipolymer yokwenziwa esetshenziswa kakhulu yesithathu ngemva kwe-PE ne-PP. Ikhiqizwa ukusabela kwegesi ye-chlorine engu-57% kanye negesi ye-ethylene engu-43%. Igesi ye-chlorine itholakala nge-electrolysis yamanzi olwandle, kanti igesi ye-ethylene itholakala ngokugaywa kukawoyela ongahluziwe. Uma kuqhathaniswa namanye amapulasitiki, ukukhiqizwa kwe-PVC kudinga uwoyela ongahluziwe omncane kakhulu (i-PE ne-PP idinga cishe i-97% yegesi ye-ethylene). I-Chlorine ne-ethylene ziyasabela bese zakha i-ethanedichlorine. Lokhu kucutshungulwa ukuze kukhiqizwe i-Vinylchlorine monomer. Le nto yenziwe nge-polymerized ukuze yakhe i-PVC. Okokugcina, ezinye izithasiselo zisetshenziselwa ukuguqula izakhiwo ezinjengokuqina nokunwebeka. Ngenxa yenqubo elula yokukhiqiza kanye nokutholakala okukhulu kwezinto ezingavuthiwe, i-PVC iyinto engabizi kakhulu futhi ehambisana nesimeme uma iqhathaniswa namanye amapulasitiki. I-PVC inokumelana okuqinile nokukhanya kwelanga, amakhemikhali kanye ne-oxidation emanzini.
Izakhiwo ze-PVC
Uhlu olungezansi lunikeza umbono ojwayelekile wezici ezibalulekile zento:
- Impilo yesevisi engasindi, eqinile futhi ende
- Ifanele ukugaywa kabusha kanye nomthelela ophansi endaweni ezungezile uma kuqhathaniswa namanye amapulasitiki
- Ivamise ukusetshenziselwa izinhlelo zokuhlanzeka, njengamanzi okuphuza. I-PVC iyinto ebalulekile esetshenziselwa ukugcina noma ukudlulisa imikhiqizo yokudla.
- Imelana namakhemikhali amaningi, ama-asidi nezisekelo
- Amavalvu amaningi ebhola e-PVC afika ku-DN50 anesilinganiso sokucindezela esiphezulu se-PN16 (amabha angu-16 ekamelweni lokushisa).
I-PVC inephuzu eliphansi lokuthambisa kanye nokuncibilika. Ngakho-ke, akunconywa ukusebenzisa i-PVC emazingeni okushisa angaphezu kuka-60 degrees Celsius (140°F).
Izinhlelo zokusebenza
Ama-valve e-PVC asetshenziswa kakhulu ekuphathweni kwamanzi nasekuniseleni. I-PVC ibuye ilungele imidiya edlayo, njengamanzi olwandle. Ngaphezu kwalokho, i-material imelana nama-acid amaningi nezisekelo, izixazululo zikasawoti kanye nezincibilikisi eziphilayo. Ezicelweni lapho kusetshenziswa amakhemikhali abolayo nama-asidi, i-PVC ivame ukukhethwa ngaphezu kwensimbi engagqwali. I-PVC nayo inobubi obuthile. Umphumela obaluleke kakhulu ukuthi i-PVC evamile ayikwazi ukusetshenziselwa amazinga okushisa emidiya angaphezu kuka-60°C (140°F). I-PVC ayimelani nama-hydrocarbon anephunga elimnandi ne-chlorinated. I-PVC inamandla aphansi emishini kunethusi noma insimbi engagqwali, ngakho-ke amavalvu e-PVC ngokuvamile anesilinganiso sokucindezela esiphansi (i-PN16 ijwayelekile kumavalvu afika ku-DN50). Uhlu lwezimakethe ezijwayelekile lapho kusetshenziswa khona amavalvu e-PVC:
- Ukuchelela Kwasekhaya / Ochwepheshe
- Ukwelashwa kwamanzi
- Izici zamanzi nemithombo
- Ama-Aquariums
- Izindawo zokulahla udoti
- Amadamu okubhukuda
- Ukucubungula amakhemikhali
- Ukucubungula ukudla
Isikhathi sokuthumela: May-30-2020