Mukufuna kuyesa payipi yatsopano yoyikidwa ndi mphamvu. Mukuda nkhawa kuti kutseka ma valve a mpira ndikugwiritsa ntchito mphamvu yayikulu kungaswe matupi a ma valve kapena kuwononga zomangira, zomwe zingasinthe cheke chomaliza kukhala kukonza kokwera mtengo.

Kuyesa kuthamanga sikungawononge valavu ya mpira wa PVC ngati ichitidwa bwino. Kuthamanga kwa mayeso sikuyenera kupitirira nthawi 1.5 kuposa momwe valavu imagwirira ntchito, ndipo nthawi zonse muyenera kugwiritsa ntchito madzi (hydrostatic test), osati mpweya wopanikizika.

Iyi ndi sitepe yofunika kwambiri pakukhazikitsa mapaipi, ndipo ndi gwero la nkhawa zambiri kwa okhazikitsa. Ndakhala ndikukambirana izi kangapo ndi othandizana nawo monga Budi ku Indonesia. Makasitomala ake, omwe ndi makontrakitala, ayenera kukhala otsimikiza kuti zinthu zomwe amakhazikitsa zimatha kuthana ndi mayeso omaliza a makina. Kuwonongeka panthawiyi sikungokhudza mtengo wa chipangizo chatsopano.valavu; ndi nkhani yokhudza nthawi yotayika ndi kudalirana. Valavu yopangidwa bwino yochokera ku Pntek yapangidwa ndikuyesedwa kuti igwire ntchito mosavuta, bola ngati njira zokhazikika zikutsatiridwa. Tiyeni tiwunikenso njira zimenezo.

Kodi mungathe kuyesa kuthamanga kwa magazi pogwiritsa ntchito valavu ya mpira?

Paipi yatha, ndipo nthawi yakwana yoti muyesere kutayikira komaliza. Simukudziwa ngati muyenera kuyesa ndi ma valve otseguka ngati gawo la mzere, kapena otsekedwa ngati malekezero osatha.

Inde, mungathe ndipo muyenera kuyesa kuthamanga motsutsana ndi valavu ya mpira pamalo otsekedwa kuti muwone ngati chisindikizo chake chili cholimba. Komabe, kuyesa koyamba kwa dongosolo kuyenera kuchitika ndi mavalavu onse pamalo otseguka.

Njira iyi ya magawo awiri ndi muyezo waukadaulo. Imatsimikizira kuti mumayesa gawo lililonse la dongosolo molondola popanda kuyika mphamvu zosafunikira pa gawo lililonse. Kuyesa koyamba kumawona malo olumikizira mapaipi ndi zolumikizira zanu, ndipo kuyesa kwachiwiri kumatsimikiza kuti valavu yokha ikugwira ntchito momwe iyenera kukhalira. Ndi kusiyana kosavuta, koma kumapangitsa njira yoyesera kukhala yotetezeka komanso yogwira mtima kwambiri.

Njira Yoyesera ya Magawo Awiri

Kutsatira njira iyi kumatsimikizira mayeso okwanira komanso otetezeka. Choyamba, mukutsimikizira kukhulupirika kwa payipi. Kenako, mukutsimikizira kuthekera kwa kutseka kwa valavu.

1. Mayeso a Umphumphu wa Dongosolo (Ma Valves Otseguka):Cholinga chachikulu apa ndikupeza malo otayikira m'malo onse olumikizira mapaipi omwe mwamata. Tsekani malekezero a mapaipi anu omalizidwa ndi zipewa. Onetsetsani kuti ma valve onse a mpira omwe ali mkati mwa mzere ali mumalo otseguka kwathunthuIzi zimathandiza kuti madzi adzaze dongosolo lonse, kuphatikizapo matupi a ma valvu, kotero chilichonse chimayesedwa ngati chubu chimodzi chopitilira. Bweretsani dongosololo kufika pa kuthamanga koyesera pang'onopang'ono ndikuyang'ana cholumikizira chilichonse ngati chikutuluka. Njira iyi imayesa luso lanu pa kulumikizana kwa mapaipi.
2. Mayeso a Chisindikizo cha Ma Vavu (Ma Vavu Otsekedwa):Dongosolo likadutsa mayeso oyamba, mutha kuyesa mipando ya mavavu. Izi ndizofunikira kwambiri pamavavu odzipatula kumapeto kwa mzere. Dongosolo likapanikizika, tsekani pang'onopang'ono valavu. Yang'anani ngati pali kutuluka kulikonse kuchokera ku tsinde la valavu ndikuyang'ana mbali ya valavu yomwe ili pansi kuti muwonetsetse kuti ikupereka chisindikizo chokwanira, cholimba ngati thovu. Izi zimayesa ubwino wa zisindikizo zamkati za valavu (mipando ya TPE/EPDM).

Kodi mungathe kuyesa chitoliro cha PVC chopanikizika?

Mukuyang'ana chitoliro cha PVC chopangidwa ndi guluu watsopano kwa nthawi yayitali. Kuganiza zochidzaza ndi madzi amphamvu kumakupangitsani mantha. Nanga bwanji ngati malo olumikizirana alephera kapena chitolirocho chiphulika?

Inde, kuyesa kuthamanga kwa chitoliro cha PVC ndi njira yokhazikika komanso yofunikira. Muyenera kugwiritsa ntchito madzi (kuyesa kwa hydrostatic) ndikukhala mkati mwa malire a kuthamanga, omwe amadalira kuchuluka kwa kuthamanga kwa chitoliro ndi kutentha kwake.

Iyi ndi mbali ina yomwe kutsatira malamulo okhazikika ndiye chinsinsi cha chitetezo ndi kupambana. Makina a mapaipi a PVC ndi olimba kwambiri, koma sangawonongeke. Makina onsewa—mapaipi, zolumikizira, ndi ma valve—apangidwa kuti azitha kupanikizika. Kuyesa kuthamanga ndi njira yotsimikizira kuti kukhazikitsa kwachitika bwino ndipo makinawo ali okonzeka kugwiritsidwa ntchito. Lamulo lofunika kwambiri ndilakuti musagwiritse ntchito mpweya wopanikizika.

Kuyesa kwa Hydrostatic vs. Pneumatic

Kugwiritsa ntchito madzi (hydrostatic) ndiyo njira yokhayo yovomerezeka yakuyesa kuthamanga kwa magaziMapaipi a thermoplastic. Kugwiritsa ntchito mpweya (pneumatic) n'koopsa kwambiri ndipo n'koletsedwa ndi miyezo yonse yayikulu.

Mtundu wa Mayeso	Njira	Chitetezo	Chifukwa Chake Imagwiritsidwa Ntchito/Siigwiritsidwa Ntchito
Madzi Osasintha	Amagwiritsa ntchito madzi, omwe ndi ovuta kuwafinya.	Otetezeka.Ngati patuluka madzi, mphamvu imatsika nthawi yomweyo ndi madzi ochepa chabe.	Muyezo wa mafakitale.Imapeza bwino malo otayikira popanda chiopsezo cha kulephera mwamphamvu. Ma valve onse a Pntek adapangidwira izi.
Pneumatic	Amagwiritsa ntchito mpweya wopanikizika, womwe umasunga mphamvu zambiri.	Zoopsa Kwambiri.Ngati gawo lina lalephera, mphamvu yosungidwayo imatulutsidwa mwachangu, zomwe zimapangitsa kuti zidutswa za pulasitiki ziziuluka ngati zidutswa za pulasitiki.	Musagwiritse ntchito njira iyi.Ndi chiwopsezo chachikulu cha chitetezo ndipo chingayambitse kuvulala kwambiri kapena imfa.

Nthawi zonse tsatirani "Lamulo la 1.5x": kuthamanga kwakukulu kwa mayeso sikuyenera kupitirira nthawi 1.5 kuposagawo lotsika kwambirimu dongosolo kwa nthawi yochepa.

Kodi valavu ya mpira wa PVC imagwira ntchito yotani?

Mukufuna ma valve a pulojekiti. Mukuwona ma code osiyanasiyana monga PN10, PN16, kapena Schedule 80. Muyenera kudziwa kuti ndi iti yomwe ingathe kuthana ndi kupanikizika kwa makina popanda chiopsezo cholephera.

Kuchuluka kwa mphamvu ya valavu ya mpira wa PVC kumadalira kapangidwe kake, kukula kwake, ndi kutentha kwake. Vavu yodziwika bwino ya PN10 imayesedwa pa mipiringidzo 10 (145 psi) kutentha kwa chipinda, pomwe PN16 imatha kugwira mipiringidzo 16 (232 psi).

Ichi ndi chimodzi mwa zinthu zofunika kwambiri zomwe ndikukambirana ndi Budi. Kugwirizanitsa kupanikizika kwa valavu ndi zofunikira za makina ndikofunikira kwambiri. Kupanikizika, komwe nthawi zambiri kumatchedwa CWP (Cold Working Pressure), kumalembedwa bwino pa valavu. Kumakuuzani kupanikizika kwakukulu komwe valavu ingathe kuthana nako mumadzi otentha (pafupifupi 20°C / 68°F).

Udindo Wofunika Kwambiri wa Kutentha

Pa PVC, kuthamanga ndi kutentha zimalumikizana mwachindunji. Pamene kutentha kwa madzi mu chitoliro kukukwera, mphamvu ya zinthu za PVC imatsika. Izi zikutanthauza kuti valavu imatha kuthana ndi kuthamanga pang'ono. Izi zimatchedwa "kuchepetsa kutentha."

Kutentha kwa Madzi	Kuchepetsa Kupanikizika kwa Mavoti	Chitsanzo: Valavu ya PN16 (16 Bar)
20°C (68°F)	1.0 (Chiwerengero Chonse)	16 Bar
30°C (86°F)	0.82	13.1 Bar
40°C (104°F)	0.65	10.4 Bar
50°C (122°F)	0.50	8.0 Bar
60°C (140°F)	0.22	3.5 Bar

Izi ndizofunikira kwambiri m'nyengo yotentha ngati Indonesia. Valavu yomwe ili yotetezeka bwino pa 20°C ikhoza kukhala pafupi kwambiri ndi malire ake mu payipi ya 40°C yomwe imayatsidwa ndi dzuwa. Nthawi zonse ganizirani kutentha kwakukulu komwe kungagwiritsidwe ntchito posankha gulu la kuthamanga kwa valavu.

Kodi mavuto ofala kwambiri ndi valavu ya mpira ndi ati?

Munatchula valavu yapamwamba kwambiri, koma patatha miyezi ingapo kasitomala wanu akuyimba foni kuti akuuzeni kuti ikutuluka kapena kuti ikuvuta kuyitembenuza. Muyenera kumvetsetsa chomwe chimayambitsa kulephera kumeneku kuti mupewe.

Mavuto ofala kwambiri ndi kutuluka kwa madzi kuchokera ku tsinde kapena mtedza wa union, chogwirira chomwe chimavuta kutembenuza, kapena ming'alu m'thupi. Mavutowa nthawi zambiri amayamba chifukwa choyikika molakwika kapena kuwonongeka kwakuthupi.

Ngakhale valavu yopangidwa bwino ndi yodalirika kwambiri, siili yotetezeka ku mavuto. Zolephera zambiri zomwe ndimaona m'munda zimabwera ku chimodzi mwa zinthu ziwiri: cholakwika chokhazikitsa kapena zinthu zakunja. Kumvetsetsa zomwe zimayambitsa izi ndikofunikira. Ichi ndichifukwa chake ku Pntek, sitingoyang'ana kwambiri pakupanga valavu yolimba komanso kuphunzitsa ogwirizana nawo monga Budi za momwe angagwirire ntchito bwino komanso momwe angayikitsire.

Zifukwa Zomwe Zimayambitsa Kulephera kwa Valavu

Nazi mavuto akuluakulu omwe timawaona komanso momwe tingawapewere.

1. Zisindikizo Zotuluka:Kutuluka kwa madzi kuchokera ku tsinde kapena mtedza wa union nthawi zambiri kumatanthauza kuti mphete ya O yawonongeka kapena yasowa. Izi zitha kuchitika ngati valavu yakonzedwanso mosasamala. Kulimbitsa kwambiri mtedza wa union ndi wrench yayikulu kungathenso kusokoneza ma seal ndikuyambitsa kutuluka kwa madzi. Nthawi zonse gwirani kaye ndi dzanja.
2. Ntchito Yovuta:Chifukwa chachikulu chomwe chimapangitsa kuti valavu ikhale yolimba kapena yogwidwa ndi simenti yosungunulira (guluu) yomwe imalowa mkati mwa makinawo panthawi yoyika. Ichi ndichifukwa chake muyeneranthawi zonseIkani valavu yeniyeni ya mpira wa union pomamatiza zolumikizira kumapeto poyamba, kenako kusonkhanitsa thupi la valavu pambuyo poti guluu wauma bwino.
3. Thupi Losweka:Ming'alu nthawi zambiri imayamba chifukwa cha kupsinjika kwakunja. Izi zitha kukhala chifukwa cha cholumikizira cholimba kwambiri, kugwedezeka kwambiri ndi chida, kapena kulola valavu kuzizira madzi atalowa mkati. Musagwiritse ntchito valavu ya mpira kuti ithandizire kulemera kwa chitoliro.

Kukhazikitsa ndi kusamalira bwino zinthu kungapewe mavuto ochulukirapo opitilira 90%.

Mapeto

Kuyesa kupanikizikaValavu ya mpira wa PVCNdi yotetezeka komanso yofunikira ikagwiritsidwa ntchito moyenera. Pogwiritsa ntchito madzi, kulemekeza kupanikizika, komanso kutsatira mayeso oyenera a magawo awiri, mumatsimikiza kuti pali njira yodalirika komanso yopanda kutayikira madzi.