Mukukhazikitsa chingwe chatsopano chamadzi ndikugwira valavu ya PVC. Koma ngati simukudziwa malire ake, ndiye kuti mutha kuphulika mowopsa, kusefukira kwamadzi, komanso kutsika mtengo kwadongosolo.

Valavu ya mpira wa PVC ya Ndandanda 40 nthawi zambiri imayikidwa kuti igwire 150 PSI (Mapaundi pa Square Inch) pa 73 ° F (23 ° C). Kuthamanga kumeneku kumachepa kwambiri pamene kutentha kwa madzi kumawonjezeka, choncho ndikofunikira kuyang'ana zomwe wopanga amapanga.

Nambala imeneyo, 150 PSI, ndiye yankho losavuta. Koma yankho lenileni ndi lovuta kwambiri, ndipo kumvetsetsa ndilofunika kwambiri pomanga dongosolo lotetezeka, lodalirika. Nthawi zambiri ndimakambirana izi ndi Budi, woyang'anira zogula ku Indonesia. Amaphunzitsa gulu lake kuti afunse makasitomala osati "mukufuna kukakamizidwa kotani?" komanso "kutentha kotani?" ndipo "mukuletsa bwanji kuyenda?" Pampu imatha kupanga ma spikes othamanga kwambiri kuposa avareji yadongosolo. Vavu ndi gawo limodzi la dongosolo lonse. Kudziwa kuchuluka kwa kukakamizidwa komwe kungathe kupirira sikungowerenga nambala; ndi za kumvetsetsa momwe dongosolo lanu lidzakhalira mu dziko lenileni.

Kodi valavu ya PVC ndi yotani?

Mukuwona "150 PSI" yosindikizidwa pa valve, koma izi zikutanthauza chiyani? Kuigwiritsa ntchito m'mikhalidwe yolakwika kungayambitse kulephera, ngakhale kupanikizika kukuwoneka kochepa.

Kupanikizika kwa valve ya PVC, nthawi zambiri 150 PSI ya Ndandanda 40, ndi mphamvu yake yotetezeka yogwira ntchito kutentha. Pamene kutentha kumakwera, PVC imafewetsa ndipo mphamvu yake yogwiritsira ntchito mphamvu imatsika kwambiri.

Ganizirani za kukakamizidwa ngati mphamvu yake mumkhalidwe wangwiro. Pazipinda zotentha za 73 ° F (23 ° C), valavu yoyera ya PVC ndi yamphamvu komanso yolimba. KomaPVC ndi thermoplastic, zomwe zikutanthauza kuti zimakhala zofewa ndi kutentha. Ili ndiye lingaliro lofunikira kwambiri kuti mumvetsetse: muyenera "kuchepetsa" kuthamanga kwa kutentha kwambiri. Mwachitsanzo, pa 100 ° F (38 ° C), valavu ya 150 PSI ikhoza kukhala yotetezeka mpaka 110 PSI. Mukafika pa 140 ° F (60 ° C), mlingo wake wapamwamba watsikira pafupifupi 30 PSI. Ichi ndichifukwa chake PVC wamba ndi mizere yamadzi ozizira okha. Kwa kupanikizika kwakukulu kapena kutentha pang'ono, mungayang'aneGawo la 80PVC(nthawi zambiri imvi yakuda), yomwe imakhala ndi makoma okhuthala komanso kuthamanga kwambiri koyambirira.

PVC Pressure Rating vs. Kutentha

Kodi malire a kuthamanga kwa vavu ya mpira ndi chiyani?

Mukudziwa kuti kuthamanga kwa makina anu kumakhala kosachepera malire. Koma kutsekedwa kwadzidzidzi kwa valve kumatha kupangitsa kuti pakhale kuthamanga komwe kumadutsa malirewo, ndikupangitsa kuphulika nthawi yomweyo.

Kupanikizika komwe kwanenedwa ndi kwa static, osagwedezeka. Malire awa samawerengera mphamvu zamphamvu ngatinyundo yamadzi, kuthamanga kwadzidzidzi kwadzidzidzi komwe kungathe kuthyola valavu yomwe ili ndi mphamvu zambiri.

Nyundo yamadzi ndiyomwe imapha mwakachetechete zigawo za mapaipi. Tangoganizani chitoliro chachitali chodzaza madzi chikuyenda mwachangu. Mukatseka valve, madzi onse oyenda ayenera kuyima nthawi yomweyo. Kuthamanga kumapanga chiwopsezo chachikulu chomwe chimabwerera kupyola chitoliro. Kuthamanga kwamphamvu kumeneku kumatha kukhala 5 mpaka 10 nthawi yanthawi zonse. Dongosolo lomwe likuyenda pa 60 PSI limatha kukumana ndi 600 PSI kwakanthawi. Palibe valavu ya mpira wa PVC yokhazikika yomwe ingapirire izi. Nthawi zonse ndimamuuza Budi kuti akumbutse makasitomala ake za izi. Vavu ikalephera, n'zosavuta kuimba mlandu mankhwalawo. Koma nthawi zambiri, vuto ndi kamangidwe kachitidwe kamene sikamawerengera nyundo yamadzi. Njira yabwino yopewera ndikutseka ma valve pang'onopang'ono. Ngakhale ndi valavu ya mpira wa kotala, kugwiritsa ntchito chogwiriracho bwino pa sekondi imodzi kapena ziwiri m'malo mochitseka kumapangitsa kusiyana kwakukulu.

Kodi PVC ingapirire bwanji kupsinjika?

Mwasankha valavu yoyenera, koma bwanji chitoliro? Dongosolo lanu ndi lolimba ngati ulalo wake wofooka kwambiri, ndipo kulephera kwa chitoliro kumakhala koyipa ngati kulephera kwa valve.

Kuchuluka kwa kuthamanga kwa PVC kumatha kupirira kumadalira "ndandanda" yake kapena makulidwe a khoma. Standard Ndandanda 40 PVC chitoliro ali otsika kuthamanga mlingo kuposa thicker-mipanda, mafakitale kwambiri Ndandanda 80 chitoliro.

Ndi kulakwitsa kofala kuyang'ana pa mlingo wa valve. Muyenera kufananiza zigawo zanu. Chitoliro cha 2-inch Schedule 40, chitoliro choyera chomwe mumachiwona paliponse, chimavotera pafupifupi 140 PSI. Chitoliro cha 2-inchi Pulogalamu 80, yomwe ili ndi makoma okhuthala kwambiri ndipo nthawi zambiri imakhala yotuwa, imavotera 200 PSI. Simungathe kuwonjezera mphamvu yamagetsi anu pogwiritsa ntchito valavu yamphamvu. Mukayika valavu ya Schedule 80 (yomwe idavotera 240 PSI) papaipi ya Pulogalamu 40 (yomwe idavotera 140 PSI), mphamvu yotetezedwa yadongosolo lanu ikadali 140 PSI yokha. Chitoliro chimakhala cholumikizira chofooka kwambiri. Pamakina aliwonse, muyenera kuzindikira kuchuluka kwa mphamvu ya chigawo chilichonse - mapaipi, zolumikizira, ndi mavavu - ndikupanga dongosolo lanu mozungulira gawo lotsika kwambiri.

Kufananiza kwa Pulogalamu ya Chitoliro (Chitsanzo: 2-inch PVC)

Kodi mavavu a PVC ndi abwino?

Mukuyang'ana valavu yapulasitiki yopepuka ndikuganiza kuti ndiyotsika mtengo. Kodi mungakhulupiriredi gawo lotsika mtengoli kukhala chigawo chodalirika m'dongosolo lanu lamadzi lovuta?

Inde, apamwamba kwambiriPVC valavu mpirandi zabwino kwambiri pazolinga zawo. Mtengo wawo suli mu mphamvu yankhanza, koma chitetezo chokwanira ku dzimbiri, zomwe zimawapangitsa kukhala odalirika kuposa zitsulo muzogwiritsira ntchito zambiri.

Lingaliro la "kutsika mtengo" limachokera kuyerekeza PVC ndi zitsulo. Koma izi zikuphonya mfundo. M'malo ambiri ogwiritsira ntchito madzi, makamaka paulimi, ulimi wa m'madzi, kapena dziwe lamadzi, dzimbiri ndizomwe zimayambitsa kulephera. Vavu ya mkuwa kapena yachitsulo imachita dzimbiri ndikugwira pakapita nthawi. Valavu yabwino ya PVC, yopangidwa kuchokera ku 100% utomoni wa namwali wokhala ndi mipando yosalala ya PTFE ndi mphete za O-zowonjezera, sizidzatero. Idzagwira ntchito bwino kwa zaka zambiri m'malo omwe angawononge zitsulo. Budi amapambana makasitomala okayikira pokonzanso funsolo. Funso siloti "kodi pulasitiki ndiyabwino?" Funso ndilakuti "Kodi zitsulo zimatha kugwira ntchito?" Kuwongolera madzi ozizira, makamaka pamene pali mankhwala kapena mchere, valavu ya PVC yopangidwa bwino sikuti ndi yabwino chabe; ndiye kusankha kwanzeru, kodalirika, komanso kopanda mtengo kwa nthawi yayitali.

Mapeto

Valavu ya mpira wa PVC imatha kugwira 150 PSI kutentha. Phindu lake lenileni lagona pakukana dzimbiri, koma nthawi zonse zimatengera kutentha ndi nyundo yamadzi kuti ikhale yotetezeka, yokhalitsa.