Mumadalira paValavu ya mpira wa PVCchifukwa cha kutsekedwa kwakukulu, koma tsiku lina idzagwa kapena kusweka. Tsopano pulojekiti yanu yayimitsidwa, kasitomala wanu sakusangalala, ndipo muyenera kuthana ndi kuwonongeka kwa madzi ndi kukonza zinthu zodula.

Ma valve a mpira wa PVC nthawi zambiri amalephera chifukwa cha zifukwa zazikulu zisanu: kumangika kwambiri panthawi yoyika, kukalamba kapena kutopa, kugwiritsa ntchito ulusi wosagwirizana monga NPT vs BSPT, kuwonetsa valavu kutentha kopitirira malire ake, ndi ming'alu yeniyeni chifukwa cha kupsinjika.

Ndikamalankhula ndi mnzanga Budi, nthawi zambiri timakambirana za mavuto omwe makasitomala ake amakumana nawo m'munda. Valavu yotuluka ingawoneke ngati vuto laling'ono, koma ikhoza kukhala chizindikiro cha vuto lalikulu kwambiri pakupanga kapena kukhazikitsa makina. Kumvetsetsa chifukwa chake valavu yalephera ndiye chinsinsi chopewera kuti isachitikenso. Sizongokhudza kungosintha gawo losweka; koma ndi za kumanga makina odalirika kwa nthawi yayitali. Tiyeni tiwone zifukwa zomwe zimafala kwambiri kuti valavu ya mpira wa PVC ingakukhumudwitseni.

Kodi ndi mavuto otani omwe amakumana ndi ma valve a mpira wa PVC?

Mukuyesera kulimbitsa cholumikizira mu valavu yanu yatsopano, ndipo mukumva ming'alu yofooka. Tsopano valavuyo yasweka pang'ono pa doko, zomwe zimapangitsa kuti isagwire ntchito isanayikidwe.

Mavuto ofala kwambiri ndi ma doko osweka chifukwa chomangika kwambiri, zogwirira zosweka chifukwa chogwiritsa ntchito mphamvu zambiri, komanso kutuluka kwa madzi kuchokera ku tsinde. Izi nthawi zambiri zimachitika chifukwa cha njira zosayenera zoyikira m'malo mwa valavu yolakwika.

Mwina iyi ndi vuto lomwe limandivuta kwambiri komanso lovuta kumva. Thupi la valavu ya PVC ndi lolimba, koma likadali lapulasitiki. Mukayesa kulimbitsa chitoliro chachitsulo kapena kuyika mu ulusi wa PVC wachikazi, n'zosavuta kugwiritsa ntchito mphamvu zambiri. Ulusi wakuthwa wachitsulo umagwira ntchito ngati wedge, zomwe zimapangitsa kuti thupi la valavu likhale ndi mphamvu zambiri. Izi zimapangitsa kuti pakhale mng'alu kuyambira pa doko. Malangizo anga nthawi zonse ndi oti muzimange ndi dzanja kaye, kenako mugwiritse ntchito wrench kwa nthawi imodzi kapena ziwiri zokha. Chisindikizocho chimapangidwa ndichosindikizira ulusi, osati ndi mphamvu yankhanza. Kulimbitsa valavu kwambiri sikupanga chitseko chabwino; kumangopanga valavu yosweka.

Chifukwa ndi Kupewa: Kuwonongeka Kwathupi

N’chiyani chimapangitsa kuti valavu ya PVC ilephere kugwira ntchito pakapita nthawi?

Dongosolo lanu lakhala likugwira ntchito bwino kwa zaka zambiri, koma tsopano valavu yayamba kutulutsa madzi pang'onopang'ono kuchokera pa chogwirira. Kutuluka kwake ndi kochepa, koma kukuwonetsa kuti valavu yayamba kulephera kuchokera mkati.

Pakapita nthawi, zomangira zosinthika mkati mwa valavu ndizomwe zimatha kulephera. Mphete za EPDM kapena NBR O pa tsinde ndi mipando ya PTFE yozungulira mpirawo zimatha kulimba, kufooka, kapena kusweka zikamakalamba.

Valavu iliyonse ya mpira ili ndi seti ya zisindikizo zamkati zomwe zimagwira ntchito yeniyeni. Ziwiri zazing'onoMphete za OKuzungulira tsinde la valavu kumateteza madzi kutuluka mozungulira chogwirira. Mipando iwiri ikuluikulu yooneka ngati mphete imapanga chisindikizo chozungulira mpirawo pamene valavu yatsekedwa. Zisindikizo zimenezi nthawi zambiri zimapangidwa ndi zinthu mongaRabala ya EPDMkapena PTFE. Ngakhale kuti ndi yolimba kwambiri, si yokhalitsa. Kukumana ndi mankhwala m'madzi nthawi zonse, monga chlorine, kungayambitse kuti zikhale zolimba komanso zofooka. Kuwala kwa dzuwa kuchokera ku dzuwa kungathenso kuziwononga. Pazaka zambiri zotsegula ndi kutseka, zimathanso kutha. Iyi ndi gawo la moyo wa valavu. Pa ntchito zofunika kwambiri, ndi bwino kukonzekera kusintha mavalavu ngati gawo la kukonza kwa nthawi yayitali.

Kodi n’chiyani chimayambitsa kulephera kwa valavu ya mpira panthawi yoyika?

Mwalumikiza mapaipi anu onse, koma cholumikizira chimodzi chili ndi kutayikira kwakukulu. Mwagwiritsa ntchito tepi yochuluka ya ulusi, koma madzi akadali kupeza njira yotulukira, akutuluka nthawi zonse kuchokera mu ulusiwo.

Cholakwika chofala kwambiri pakuyika chomwe chimayambitsa kulephera nthawi yomweyo ndi kusalingana kwa ulusi. Kuyesa kulumikiza cholumikizira cha ulusi cha NPT ku valavu ya BSPT (kapena mosemphanitsa) kumapanga chisindikizo cholakwika chomwe chimatsimikizika kuti chidzatuluka.

Monga momwe ine ndi Budi tafotokozera pamsika waku Indonesia, nthawi zambiri mumawona zonse ziwiriMiyezo ya NPT ndi BSPT. Amawoneka ofanana kwambiri, koma sakugwirizana. Ulusi wa NPT uli ndi ngodya ya madigiri 60, pomwe ulusi wa BSPT uli ndi ngodya ya madigiri 55. Ngati muyesa kuwagwirizanitsa, amadutsa ulusi ndi kumangirirana. Simukupanga chisindikizo choyenera; mukungowononga ulusi mbali zonse ziwiri. Palibe chotchingira ulusi chomwe chingakonze kusiyana kwakukulu kumeneku. Madzi nthawi zonse amapeza njira yodutsa m'mipata. Musanayike chilichonse, muyenera kutsimikizira kuti ulusi wamwamuna ndi ulusi wamkazi ndi muyezo womwewo. Kufufuza kamodzi kumeneku kungapewe chimodzi mwa zifukwa zofala komanso zopewera zomwe zimayambitsa kutuluka kwa madzi. Ichi ndi tsatanetsatane waung'ono womwe umapanga kusiyana kwakukulu.

Kodi chifukwa chachikulu cha kulephera kwa ma valve ndi chiyani?

Valavu imapindika mwadzidzidzi ndikuyamba kutuluka madzi moyipa, ngakhale idayikidwa bwino. Kupanikizika kwa dongosolo ndi kwabwinobwino, ndipo palibe kuwonongeka kooneka, zomwe zimakupangitsani kusokonezeka ndi chomwe chachititsa kulephera kwadzidzidzi.

Chifukwa chimodzi chofala kwambiri cha kulephera kwa valavu ya PVC ndikupitirira malire ake otentha. Kugwiritsa ntchito valavu ya mpira ya PVC yokhazikika mu mzere wa madzi otentha kungayambitse kufewa, kusokonekera, ndikulephera mwachangu.

Imeneyi ndi nkhani yofunika kwambiri pa chitetezo. PVC yokhazikika ndi chinthu chabwino kwambiri, koma ili ndi malire omveka bwino: kutentha. Sichiyenera kugwiritsidwa ntchito poika kutentha komwe kumapitirira 60°C (140°F). Pamwamba pa kutentha kumeneku, chinthucho chimayamba kufewa ngati tchizi cholimba chomwe chasiyidwa padzuwa. Valavu yomwe idayesedwa kuti igwire kupanikizika kwa 16 bar kutentha kwa chipinda ikhoza kukwanitsa kuthana ndi gawo laling'ono chabe isanayambe kusokonekera. Mpira wamkati ukhoza kupindika kuchoka mu mawonekedwe ake ozungulira, ndipo thupi la valavu likhoza kutupa. Izi zikachitika, zisindikizo sizingagwirizanenso bwino, zomwe zimapangitsa kuti pakhale kutuluka madzi ambiri. Ngati kugwiritsa ntchito kwanu kukuphatikizapo madzi otentha, muyenera kugwiritsa ntchito chinthu chomwe chapangidwira, mongaCPVC. Izi si lingaliro; ndi lamulo la dongosolo lotetezeka komanso lodalirika.

Mapeto

Pewani kulephera kwa valavu ya PVC mwa kumangirira bwino, kufananiza ulusi (NPT/BSPT), kulemekeza malire a kutentha kwa 60°C, ndikukonzekera kukalamba kwa chisindikizo. Kukhazikitsa ndi kugwiritsa ntchito bwino ndikofunikira kwambiri kuti dongosolo likhale lolimba komanso lopanda kutayikira.