PVC (polyvinyl chloride) ndi UPVC (unplasticized polyvinyl chloride) ndi zida zomwe zimagwiritsidwa ntchito kwambiri popanga zopangira mavavu.

PVC (polyvinyl chloride) ndi UPVC (unplasticized polyvinyl chloride) ndi zida zomwe zimagwiritsidwa ntchito kwambiri popanga zopangira mavavu. Zida zapulasitikizi zimadziwika chifukwa cha kulimba kwake, kukana kwa dzimbiri, komanso kukwanitsa kukwanitsa, zomwe zimawapangitsa kukhala zosankha zodziwika bwino pamagwiritsidwe osiyanasiyana, kuphatikiza mapaipi, ulimi wothirira, ndi njira zama mafakitale.

Mtundu umodzi wodziwika bwino wa valavu wopangidwa kuchokera ku PVC kapena UPVC ndi valavu ya pansi ya PVC, yomwe imapangidwa kuti izitha kuyendetsa madzi komanso kupewa kubwereranso. Mfundo yogwira ntchito ya valve ya pansi ya PVC imachokera pa njira yosavuta koma yothandiza. Madziwo akamapita kumene akufuna, valavu imatseguka kuti madziwo adutse. Komabe, pamene pali kusintha kwa kayendetsedwe kake, valavu imatseka yokha kuti asabwerere mmbuyo.

Zigawo zazikulu za valavu ya pansi ya PVC zimaphatikizapo thupi la valve, lomwe nthawi zambiri limapangidwa ndi PVC kapena UPVC, ndi makina osindikizira monga mphira kapena silicone gasket. Kuthamanga kwamadzimadzi kukakhala kokulirapo kumbali yolowera ya valve, kumakankhira makina osindikizira, kuchititsa kuti valavu itseguke ndikulola madziwo kudutsa. Mosiyana ndi zimenezi, pamene kupanikizika kumbali yotuluka kumakwera, makina osindikizira amakanikizidwa pampando wa valve, kutseka bwino kutuluka kwake.

Kugwiritsa ntchito PVC kapena UPVC pomanga ma valve pansi kumapereka maubwino angapo. Zidazi ndizopepuka, zomwe zimapangitsa kuti ma valve azitha kugwira ntchito ndikuyika. Kuphatikiza apo, PVC ndi UPVC zimagonjetsedwa ndi dzimbiri, kuwonongeka kwa mankhwala, ndi kukula kwachilengedwe, zomwe zimawapangitsa kukhala oyenera kugwiritsidwa ntchito m'malo osiyanasiyana, kuphatikizapo zowononga ndi zowononga.

Kuphatikiza apo, mavavu apansi a PVC ndi a UPVC ndi njira zotsika mtengo kuposa mavavu achitsulo achikhalidwe, omwe amapereka magwiridwe ofanana pamtengo wotsika. Malo awo osalala amkati amachepetsanso kutsika komanso chipwirikiti, zomwe zimapangitsa kuti madzi aziyenda bwino.

Pomaliza, PVC ndi UPVC ndi zida zosunthika popanga zopangira ma valve, kuphatikiza ma valve apansi. Mfundo yogwira ntchito ya valve ya pansi ya PVC imachokera ku njira yodalirika ya kuthamanga kwamadzimadzi kuti athe kuyendetsa bwino komanso kuteteza kubwerera. Ndi kulimba kwawo, kukana kwa dzimbiri, komanso kutsika mtengo, mavavu apansi a PVC ndi a UPVC ndi ofunika kwambiri pamakina osiyanasiyana owongolera madzimadzi.