Mukufuna valavu ya mzere wa mankhwala, koma PVC yokhazikika si njira yabwino. Kusankha zinthu zolakwika kungayambitse kutuluka kwa madzi, kutayikira koopsa, komanso kuwonongeka kwakukulu kwa dongosolo lanu lonse.

Valavu ya mpira wa PP ndi valavu yotseka yopangidwa ndi polypropylene, polima ya thermoplastic. Imasankhidwa makamaka chifukwa cha kukana kwake kwambiri ku mitundu yosiyanasiyana ya ma acid, ma base, ndi mankhwala osungunulira, makamaka pamene PVC ingalephere.

Ndikamalankhula ndi anzanga monga Budi ku Indonesia, nthawi zambiri timakambirana zinthu zomwe sizingafanane ndi madzi wamba. Makasitomala ake ambiri amagwira ntchito m'mafakitale monga kukonza mankhwala kapena kukonza madzi, komwe madzi amakhala amphamvu kwambiri kuposa madzi wamba. Pa ntchito izi, kungogwiritsa ntchito madzi wamba.Valavu ya PVCSikokwanira. Mukufuna chinthu chopangidwa kuti chigwire ntchito zovuta popanda kuwonongeka. Chinthucho nthawi zambiri chimakhala polypropylene, kapena PP. Chimapereka chitetezo ndi kudalirika kofunikira pa ntchito zofunika kwambiri zamafakitale.

Kodi mawonekedwe onse a PP mu ma valve ndi ati?

Mumawona "PP" yomwe yalembedwa mu kabukhu koma simukudziwa chomwe imayimira. Izi zimapangitsa kuti zikhale zovuta kufufuza makhalidwe ake kapena kufotokozera makasitomala anu zabwino zake molimba mtima.

Ma PP onse mu ma valve ndi Polypropylene. Ndi thermoplastic yolimba kwambiri komanso yopepuka yomwe ili m'gulu lomwelo la mapulasitiki monga PVC (Polyvinyl Chloride) ndi PE (Polyethylene).

Polypropylene ndi imodzi mwa pulasitiki yogwiritsidwa ntchito kwambiri padziko lonse lapansi. Ndi chinthu chogwiritsidwa ntchito kwambiri kuyambira pazida zamagalimoto mpaka zida za labotale chifukwa cha mawonekedwe ake apadera. Mu dziko la ma valve ndi mapaipi, phindu lake lalikulu ndilakuti ndi lodabwitsa.kukana mankhwalaMosiyana ndi PVC, imatha kuthana ndi ma asidi ambiri amphamvu, ma alkali, ndi zosungunulira zachilengedwe popanda kuwonongeka. Ichi ndichifukwa chake ife ku Pntek tili ndi mzere wapadera waMa valve a PPTikudziwa kuti pa ntchito zina zamafakitale, palibe cholowa m'malo mwake. Kumvetsetsa kuti "PP" kumatanthauza polypropylene ndi sitepe yoyamba posankha valavu yoyenera yogwiritsira ntchito mankhwala ovuta.

Polypropylene (PP) vs. Polyvinyl Chloride (PVC)

Katundu	Polypropylene (PP)	Polyvinyl Chloride (PVC)
Dzina la Zinthu	Polypropylene	Polyvinyl chloride
Kugwiritsa Ntchito Kwambiri	Makampani opanga mankhwala, ma lab, ma electroplating, ndi ntchito zamafakitale.	Kuyendera madzi, kuthirira, mapaipi a m'nyumba, maiwe osambira.
Kukana Mankhwala	Zabwino kwambiri; makamaka motsutsana ndi ma acid, ma base, ndi zosungunulira.	Zabwino; koma zimakhala zosavuta kusungunuka ndi mankhwala enaake okhala ndi chlorine.
Malire a Kutentha	Pamwamba; nthawi zambiri imatha kugwira madzi mpaka 80-90°C (175-195°F).	Pansi; nthawi zambiri kutentha kumakhala kochepa kufika pa 60°C (140°F).
Njira Yolumikizira	Kusakaniza kutentha (kuwotcherera) n'kofala, komwe kumapezekanso ndi soketi/ulusi	Simenti yosungunulira (yomatira) ya ma sockets, ulusi.

Kodi mpira wa PP ndi chiyani?

Mukuona valavu yokhala ndi thupi la PVC koma mpira wa PP. Kusakaniza kumeneku kwa zinthu kumawoneka kwachilendo, ndipo mumadabwa ngati ndi njira yochepetsera ndalama kapena chinthu chokhala ndi cholinga chenicheni.

Mpira wa PP ndi mpira wozungulira mkati mwa valavu yopangidwa ndi polypropylene. Kugwiritsa ntchito mpira wa PP mkati mwa valavu ya PVC ndi chisankho chanzeru chomwe chimathandiza kuti valavuyo isagwire ntchito bwino komanso kuti mtengo wake ukhale wotsika.

Iyi ndi mfundo yodziwika bwino yokambirana. Mpira ndi mipando ndi ziwalo za valavu zomwe nthawi zonse zimakumana ndi madzi, ngakhale valavu itatsekedwa. Amatchedwa "ziwalo zonyowa"Komabe, thupi la valavu limawonekera pokhapokha ngati valavu yatsegulidwa. Pakugwiritsa ntchito madzi owononga pang'ono, simungafunike kuti thupi lonse la valavu lipangidwe kuchokera ku zinthu zodula komanso zapamwamba. Pogwiritsa ntchitoMpira wa PP wosagwira mankhwalamkati mwa thupi lokhazikika la PVC, timapanga chotchingira chotsika mtengovalavuzomwe zimaperekabe chitetezo chowonjezereka pamene chili chofunika kwambiri. Ndi za kupereka yankho lolunjika lomwe limagwirizanitsa magwiridwe antchito ndi bajeti yogwirizana ndi zosowa za ogwirizana nawo.

Kodi valavu ya mpira wa PP imathamanga bwanji?

Mukudziwa kuti PP ndi yabwino pa mankhwala, koma kodi imatha kuthana ndi kupanikizika? Kugwiritsa ntchito valavu yosavomerezeka bwino ndi chiopsezo chachikulu cha chitetezo chomwe chingayambitse kuphulika kwa makina ndi kutayikira kwa mankhwala oopsa.

Mlingo wa kuthamanga kwa ma valve a mpira a Pntek's PP ndi PN16, womwe ndi 16 bar kapena pafupifupi 235 PSI kutentha kwa chipinda (20°C). Ndikofunikira kukumbukira kuti mlingo uwu umachepa pamene kutentha kwa madzi kumawonjezeka. Nthawi zonse yang'anani tchati cha kuthamanga ndi kutentha kwa wopanga.

ZathuMa valve a mpira wa PPKu Pntek ali ndi PN16 yolimba. Izi zikutanthauza kuti amatha kuthana ndi kuthamanga kwa 16 bar, komwe ndi pafupifupi 235 PSI. Kuthamanga kwakukulu kumeneku ndi chizindikiro cha khalidwe la mafakitale, koma si nkhani yonse. Chofunika kwambiri chomwe ndikufotokozera kwa ogwirizana nawo ngati Budi ndikuti kuthamanga uku kumalumikizidwa mwachindunji ndi kutentha kwa madzi. Ma thermoplastic onse, kuphatikiza polypropylene, amakhala ofewa komanso osalimba akamatentha kwambiri. Pamene zinthuzo zikufewa, kuthekera kwake koletsa kuthamanga kumachepa kwambiri. Kunyalanyaza kuzungulira 'kosokoneza' kumeneku si njira yoipa chabe; ndikoopsa. Timapereka tchati chomveka bwino chokhala ndi ma valve athu kuti tipewe kulephera kwa makina ndikuwonetsetsa kuti chitetezo cha makasitomala athu nthawi zonse chimakhala chofunikira kwambiri.

Udindo Wofunika Kwambiri wa Kuchepetsa Kutentha

Kutentha kwa Madzi	Kupanikizika Kwambiri Kogwira Ntchito (Valavu ya PN16)
20°C (68°F)	Mipiringidzo 16 (235 PSI)
60°C (140°F)	Mipiringidzo 6.4 (94 PSI)
80°C (176°F)	Mipiringidzo 3.2 (47 PSI)

Zindikirani: Ichi ndi chitsanzo cha valavu ya PN16. Nthawi zonse funsani pepala la deta la Pntek kuti mudziwe ziwerengero zenizeni.

Kodi valavu ya PP-H ndi chiyani?

Mumakumana ndi mitundu yosiyanasiyana ya PP, monga “PP-H.” Simukudziwa tanthauzo la “-H” kapena ngati ndi chinthu china chomwe muyenera kuda nkhawa nacho mukamayitanitsa.

Valavu ya PP-H imapangidwa kuchokera ku Polypropylene Homopolymer. Iyi ndi mtundu wapadera wa PP wokhazikika, wodziwika bwino chifukwa cha mphamvu zake zabwino, kuuma kwake, komanso kutentha kwake, zomwe zimapangitsa kuti ikhale yoyenera kwambiri pamavavu ndi zolumikizira zamafakitale.

Si polypropylene yonse yomwe imapangidwa mofanana. “-H” imayimira Homopolymer, zomwe zikutanthauza kuti pulasitiki imapangidwa kuchokera ku mtundu umodzi wokha wa monomer building block (propylene). Izi zimapangitsa kuti pakhale chinthu cholimba komanso cholimba, chomwe ndi chomwe mukufuna pa valavu yomwe imafunika kukhala ndi kuthamanga kwambiri ndikukana kupindika. Pali mitundu ina, monga copolymers (PP-B, PP-R), yomwe imapangidwa powonjezera monomer ina. Mitundu inayi ndi yosinthasintha kapena imakhala ndi mphamvu yabwino kwambiri pa kutentha kochepa, zomwe zimapangitsa kuti ikhale yoyenera pazinthu zina, monga mapaipi omwe amafunika kupindika. Ku Pntek, timasankha PP-H pamavavu athu amakampani chifukwa kulimba kwake ndi kukana kutentha kumapereka magwiridwe antchito abwino kwambiri komanso moyo wautali wautumiki.

Mitundu Yodziwika ya Polypropylene

Mtundu	Dzina lonse	Katundu Wofunika	Mlandu Wabwino Kwambiri Wogwiritsira Ntchito
PP-H	Homopolymer	Kulimba kwambiri, mphamvu, kukana kutentha kwambiri komanso mankhwala.	Mavavu, zolumikizira zamafakitale, matanki a mankhwala.
PP-B	Copolymer ya Block	Mphamvu yolimba kwambiri, makamaka kutentha kochepa.	Mabatire, zida zamafakitale zomwe zimafunikira kulimba.
PP-R	Copolymer yosasinthika	Yofewa, yosinthasintha, komanso yolimba mtima kwa nthawi yayitali pa kutentha.	Mapaipi amadzi otentha ndi ozizira.

Mapeto

A Valavu ya mpira wa PPndi gawo lofunika kwambiri pakugwiritsa ntchito mankhwala mosamala. Mwa kumvetsetsa momwe zinthu zilili, malire ake opanikizika, ndi magiredi osiyanasiyana monga PP-H, mutha kusankha valavu yoyenera pantchito zamafakitale zovuta.