Kusaka mwachangu pa intaneti kwa valavu kudzawonetsa zotsatira zosiyanasiyana: zamanja kapena zodzipangira zokha, zamkuwa kapena chitsulo chosapanga dzimbiri, zopindika kapena NPT, chidutswa chimodzi, zidutswa ziwiri kapena zitatu, ndi zina zotero. Popeza pali mitundu yosiyanasiyana ya mavalavu oti musankhe, mungatsimikize bwanji kuti mukugula mtundu woyenera? Ngakhale kuti kugwiritsa ntchito kwanu kudzakuthandizani kusankha mavalavu oyenera, ndikofunikira kumvetsetsa mitundu yosiyanasiyana ya mavalavu omwe amaperekedwa.

Valavu ya mpira wa chidutswa chimodzi ili ndi thupi lolimba lomwe limachepetsa chiopsezo cha kutuluka kwa madzi. Ndi yotsika mtengo ndipo nthawi zambiri siikonzedwa.

Ma valve a mpira wa zidutswa ziwiri ndi ena mwa omwe amagwiritsidwa ntchito kwambirimavavu a mpiraMonga momwe dzinalo likusonyezera, valavu ya mpira yokhala ndi zidutswa ziwiri imakhala ndi zidutswa ziwiri, chidutswa chokhala ndi chidutswa cholumikizidwa kumapeto kwina ndi thupi la valavu. Chidutswa chachiwiri chimakwanira pamwamba pa chidutswa choyamba, chimagwirizira chokongoletseracho pamalo ake ndipo chimakhala ndi cholumikizira chachiwiri. Akayika, mavalavu amenewa nthawi zambiri sangakonzedwe pokhapokha atachotsedwa ntchito.

Apanso, monga momwe dzinalo likusonyezera, valavu ya mpira yokhala ndi zigawo zitatu imakhala ndi magawo atatu: zipewa ziwiri zomaliza ndi thupi limodzi. Zipewa zomaliza nthawi zambiri zimalumikizidwa kapena kulumikizidwa ku chitoliro, ndipo gawo la thupi limatha kuchotsedwa mosavuta kuti liyeretsedwe kapena kukonzedwa popanda kuchotsa chipewa chomaliza. Imeneyi ikhoza kukhala njira yamtengo wapatali kwambiri chifukwa imaletsa chingwe chopangira kuti chisatsekedwe pamene pakufunika kukonza.

Poyerekeza makhalidwe a valavu iliyonse ndi zofunikira pa ntchito yanu, mudzatha kupanga chisankho chodziwa bwino chomwe chikugwirizana ndi zosowa zanu. Pitani patsamba lathu la valavu kuti mudziwe zambiri za mzere wathu wazinthu zopangira valavu ya mpira kapena kuti muyambe kukonza lero.

Kuwonetsedwa ndi UV
ChoyeraChitoliro cha PVC,Mtundu womwe umagwiritsidwa ntchito popangira mapaipi, umawonongeka ukayang'anizana ndi kuwala kwa UV, monga momwe zimakhalira ndi dzuwa. Izi zimapangitsa kuti zinthuzo zisakhale zoyenera kugwiritsidwa ntchito panja komwe sizingaphimbidwe, monga mitengo ya mbendera ndi denga. Pakapita nthawi, kuwala kwa UV kumachepetsa kusinthasintha kwa zinthuzo kudzera mu kuwonongeka kwa polima, zomwe zingayambitse kusweka, kusweka, ndi kusweka.

kutentha kochepa
Pamene kutentha kumatsika, PVC imakhala yolimba kwambiri. Ikakhala pamalo ozizira kwa nthawi yayitali, imakhala yolimba komanso yosweka mosavuta. PVC si yoyenera kugwiritsidwa ntchito ngakhale kutentha kozizira nthawi zonse, ndipo madzi sayenera kuzizira mkati.Mapaipi a PVCchifukwa zimatha kuyambitsa ming'alu ndi kuphulika.

zaka
Ma polima onse kapena mapulasitiki amawonongeka pang'onopang'ono pakapita nthawi. Ndi chinthu chomwe chimachokera ku kapangidwe kake ka mankhwala. Pakapita nthawi, PVC imayamwa zinthu zotchedwa ma plasticizer. Ma plasticizer amawonjezeredwa ku PVC panthawi yopanga kuti awonjezere kusinthasintha kwake. Akamachoka m'mapaipi a PVC, mapaipi samangokhala osinthasintha chifukwa cha kusowa kwawo, komanso amakhala ndi zolakwika chifukwa cha kusowa kwa mamolekyulu a plasticizer, zomwe zingayambitse ming'alu kapena ming'alu m'mapaipi.

kukhudzana ndi mankhwala
Mapaipi a PVC amatha kusweka chifukwa cha mankhwala. Monga polima, mankhwala amatha kukhala ndi zotsatira zoyipa kwambiri pa kapangidwe ka PVC, kumasula mamolekyu pakati pa mamolekyu mu pulasitiki ndikufulumizitsa kusamuka kwa mapulasitiki kuchokera m'mapaipi. Mapaipi a PVC amatha kusweka ngati atakumana ndi mankhwala ambiri, monga omwe amapezeka mu zochotsa mapulagi amadzimadzi.