Udinga ivalvu yomugqa wamakhemikhali, kodwa i-PVC ejwayelekile ayiyona inketho. Ukukhetha izinto ezingalungile kungabangela ukuvuza, ukuchitheka okuyingozi, kanye nomonakalo obizayo ohlelweni lwakho lonke.

I-valve yebhola ye-PP iyi-valve yokuvala eyenziwe nge-polypropylene, i-polymer ye-thermoplastic. Ikhethwe ngokukhethekile ngenxa yokumelana kwayo okungavamile nezinhlobo eziningi zama-asidi, izisekelo, kanye nezinyibilikisi zamakhemikhali, ikakhulukazi lapho i-PVC ingahluleka khona.

Uma ngikhuluma nabalingani bami abanjengoBudi e-Indonesia, ingxoxo ivame ukudlulela ngale kokusetshenziswa kwamanzi okujwayelekile. Amakhasimende akhe amaningi asebenza ezimbonini ezifana nokucubungula amakhemikhali noma ukwelashwa kwamanzi, lapho uketshezi lunamandla kakhulu kunamanzi alula. Kule misebenzi, ngisebenzisa nje izinga elijwayelekile.I-valve ye-PVCakwanele. Udinga izinto ezakhelwe ukubhekana nezimo ezinzima ngaphandle kokuwohloka. Lezo zinto zivame ukuba yi-polypropylene, noma i-PP. Zinikeza ukuphepha nokuthembeka okudingekayo kulezi zinhlelo zokusebenza ezibalulekile zezimboni.

Iyini ifomu eliphelele le-PP kuma-valve?

Ubona igama elithi “PP” libhalwe kukhathalogi kodwa awuqiniseki ukuthi limelelani. Lokhu kwenza kube nzima ukubheka izakhiwo zalo noma ukuchaza izinzuzo zalo kumakhasimende akho ngokuzethemba.

Uhlobo oluphelele lwe-PP kuma-valve yi-Polypropylene. Iyi-thermoplastic eqinile kakhulu futhi elula eyingxenye yomndeni ofanayo wepulasitiki njenge-PVC (Polyvinyl Chloride) kanye ne-PE (Polyethylene).

I-Polypropylene ingenye yepulasitiki eguquguqukayo kakhulu emhlabeni. Iyinto esebenzayo esetshenziswa kukho konke kusukela ezingxenyeni zemoto kuya emishinini yelabhorethri ngenxa yezakhiwo zayo ezihlukile. Ezweni lama-valve namapayipi, inzuzo yayo eyinhloko iyamangalisa.ukumelana namakhemikhaliNgokungafani ne-PVC, ingaphatha ama-asidi amaningi aqinile, ama-alkali, kanye nezinyibilikisi eziphilayo ngaphandle kokuwohloka. Yingakho thina kwa-Pntek sinomugqa ozinikele weAmavalvu e-PPSiyazi ukuthi emisebenzini ethile yezimboni, akukho okunye okungathatha indawo yayo. Ukuqonda ukuthi “i-PP” kusho ukuthi i-polypropylene yisinyathelo sokuqala sokukhetha ivalvu efanele yokusetshenziswa kwamakhemikhali okunzima.

I-Polypropylene (PP) uma kuqhathaniswa ne-Polyvinyl Chloride (PVC)

Impahla	I-Polypropylene (PP)	I-Polyvinyl Chloride (i-PVC)
Igama Lezinto	I-Polypropylene	I-Polyvinyl Chloride
Ukusetshenziswa Okuyinhloko	Imboni yamakhemikhali, amalebhu, ukufakelwa kwe-electroplating, izinhlelo zokusebenza zezimboni.	Ukuthuthwa kwamanzi, ukunisela, amapayipi ezindlu, amachibi okubhukuda.
Ukumelana namakhemikhali	Kuhle kakhulu; ikakhulukazi ngokumelene nama-asidi, izisekelo, kanye nezinyibilikisi.	Kuhle; kodwa kusengozini yezinyibilikisi ezithile kanye namakhemikhali ane-chlorine.
Umkhawulo Wezinga Lokushisa	Iphakeme; ivame ukuphatha uketshezi olufika ku-80-90°C (175-195°F).	Ngaphansi; ngokuvamile kukhawulelwe ku-60°C (140°F).
Indlela Yokuxhuma	Ukuhlanganiswa kokushisa (ukushisela) kuvamile, kuyatholakala futhi ngamasokhethi/imicu	Usimende we-solvent (ukunamathisela) wezingxenye zesokhethi, ukuthungwa.

Iyini ibhola le-PP?

Ubona ivalvu enomzimba we-PVC kodwa ibhola le-PP. Lokhu kuhlanganiswa kwezinto kubonakala kungavamile, bese uzibuza ukuthi ingabe kuyindlela yokunciphisa izindleko noma isici esinenjongo yangempela.

Ibhola le-PP liyindilinga ejikelezayo ngaphakathi kwevalvu eyenziwe nge-polypropylene. Ukusebenzisa ibhola le-PP ngaphakathi kwevalvu ye-PVC kuyindlela ehlakaniphile yokuklama ethuthukisa ukumelana kwamakhemikhali enkabeni yevalvu ngenkathi igcina izindleko ziphansi.

Leli yiphuzu elivamile lokuxoxa ngalo. Ibhola nezihlalo yizingxenye zevalvu ezihlala zithintana noketshezi, ngisho noma ivalvu ivaliwe. Zibizwa ngokuthi “izingxenye ezimanzi"Umzimba wevalvu, ngakolunye uhlangothi, uvezwa kuphela uma ivalvu ivuliwe. Uma kusetshenziswa uketshezi olubola kancane, ungase ungadingi ukuthi wonke umzimba wevalvu wenziwe ngezinto ezibizayo nezisezingeni eliphezulu. Ngokusebenzisa i-ibhola le-PP elingamelana namakhemikhalingaphakathi komzimba ojwayelekile we-PVC, sakha i-PVC engabizi kakhuluivalvulokho kusanikeza isivikelo esithuthukisiwe lapho kubaluleke kakhulu khona. Kumayelana nokuhlinzeka ngesisombululo esiqondiwe esilinganisela ukusebenza kanye nesabelomali sezidingo ezithile zabalingani bethu.

Iyini izinga lokucindezela kwevalvu yebhola le-PP?

Uyazi ukuthi i-PP ilungele amakhemikhali, kodwa ingabe ingamelana nokucindezeleka? Ukusebenzisa i-valve engabhekwa njengebalulekile kuyingozi enkulu yokuphepha engabangela ukushaqeka kohlelo kanye nokuchitheka kwamakhemikhali okuyingozi.

Isilinganiso sokucindezela sama-valve ebhola le-PP le-Pntek yi-PN16, okuyi-16 bar noma cishe i-235 PSI ekushiseni kwegumbi (20°C). Kubalulekile ukukhumbula ukuthi lesi silinganiso siyehla njengoba izinga lokushisa loketshezi likhuphuka. Hlola njalo ishadi lokucindezela nokushisa lomkhiqizi.

OkwethuAmavalvu ebhola le-PPKwa-Pntek banesilinganiso se-PN16 esiqinile. Lokhu kusho ukuthi bangakwazi ukusingatha ingcindezi engu-16 bar, okungaba ngu-235 PSI. Lesi silinganiso esiphezulu siwuphawu lwekhwalithi yezimboni, kodwa akuyona indaba ephelele. Into ebaluleke kakhulu engiyichazela abalingani abanjengoBudi ukuthi lesi silinganiso sengcindezi sihlobene ngqo nokushisa koketshezi. Zonke i-thermoplastics, kufaka phakathi i-polypropylene, ziyathamba futhi zingaqini njengoba zishisa kakhulu. Njengoba izinto zithambile, ikhono lazo lokulawula ingcindezi liyancipha kakhulu. Ukungazinaki lesi sigoba 'esiphazamisayo' akuyona nje into embi; kuyingozi. Sinikeza ishadi elicacile nama-valve ethu ukuvimbela ukwehluleka kwesistimu nokuqinisekisa ukuthi ukuphepha kwamakhasimende ethu kuhlala kuyinto eza kuqala.

Indima Ebalulekile Yokunciphisa Izinga Lokushisa

Izinga Lokushisa Loketshezi	Ukucindezela Okuphezulu Kokusebenza (i-PN16 Valve)
20°C (68°F)	Ibha engu-16 (235 PSI)
60°C (140°F)	Ibha engu-6.4 (94 PSI)
80°C (176°F)	Ibha engu-3.2 (47 PSI)

Qaphela: Lesi yisibonelo sevalvu ye-PN16. Njalo hlola ishidi ledatha le-Pntek elithile ukuthola izibalo eziqondile.

Iyini ivalvu ye-PP-H?

Uhlangana nezinhlobo ezahlukene ze-PP, njenge-“PP-H.” Awuqiniseki ukuthi kusho ukuthini ukuthi “-H” noma ukuthi kuyinto ehlukile okudingeka ukhathazeke ngayo lapho u-oda.

Ivalvu ye-PP-H yenziwe nge-Polypropylene Homopolymer. Leli izinga elithile, eliqinile kakhulu le-PP elaziwa ngamandla ayo amahle kakhulu, ukuqina, kanye nokusebenza kahle kwezinga lokushisa eliphezulu, okwenza ifaneleke kakhulu kumavalvu ezimboni kanye nokufakwa kwawo.

Akuzona zonke izinhlobo ze-polypropylene ezidalwe zilingana. Igama elithi “-H” limele i-Homopolymer, okusho ukuthi ipulasitiki yenziwe ngohlobo olulodwa kuphela lwebhulokhi yokwakha i-monomer (i-propylene). Lokhu kuphumela ezintweni eziqinile kakhulu neziqinile, okuyilokho kanye okufunayo emzimbeni we-valve odinga ukuqukatha umfutho ophezulu futhi umelane nokugoba. Kunezinye izinhlobo, njenge-copolymers (PP-B, PP-R), ezenziwe ngokungeza enye i-monomer. Lezi ezinye izinhlobo ziguquguquka kakhulu noma zinamandla okushaya kangcono emazingeni okushisa aphansi, okwenza zifaneleke kwezinye izinto, njengamapayipi adinga ukugoba. Kwa-Pntek, sikhetha i-PP-H yama-valve ethu ezimboni ngoba ukuqina kwawo kanye nokumelana nokushisa kunikeza ukusebenza okuhle kakhulu kanye nokuphila isikhathi eside kwenkonzo.

Izinhlobo Ezivamile Ze-Polypropylene

Uhlobo	Igama eligcwele	Izakhiwo Eziyinhloko	Ikesi Lokusetshenziswa Elingcono Kakhulu
I-PP-H	I-Homopolymer	Ukuqina okuphezulu, amandla, ukumelana okuhle kakhulu nokushisa kanye namakhemikhali.	Amavalvu, izinto zokufakelwa zezimboni, amathangi amakhemikhali.
I-PP-B	I-Copolymer Yebhulokhi	Amandla aphezulu okushaya, ikakhulukazi emazingeni okushisa aphansi.	Amakesi ebhethri, izingxenye zezimboni ezidinga ukuqina okunamandla.
I-PP-R	I-Copolymer Engahleliwe	Ithambile, iguquguquka kakhudlwana, ukumelana nokushisa okuhle isikhathi eside.	Amapayipi amanzi ashisayo nabandayo.

Isiphetho

A I-valve yebhola ye-PPiyisici esibalulekile sokuphatha amakhemikhali ngokuphepha. Ngokuqonda izakhiwo zayo zezinto, imikhawulo yokucindezela, kanye namazinga ahlukene njenge-PP-H, ungakhetha ivalvu efanele yemisebenzi yezimboni edingayo.