Kufalikira kwa Ma Vavulopu a Pulasitiki

Ngakhale kuti ma valve apulasitiki nthawi zina amaonedwa ngati chinthu chapadera—chisankho chabwino kwambiri cha iwo omwe amapanga kapena kupanga zinthu za mapaipi apulasitiki zamafakitale kapena omwe ayenera kukhala ndi zida zoyera kwambiri—ngati ma valve awa alibe ntchito zambiri ndi nkhani yapafupi. Zoona zake n'zakuti, ma valve apulasitiki masiku ano ali ndi ntchito zosiyanasiyana chifukwa mitundu ya zipangizo zomwe zikukula komanso opanga abwino omwe amafunikira zipangizozo zikutanthauza njira zambiri zogwiritsira ntchito zida zosiyanasiyanazi.

Katundu wa Pulasitiki
Ubwino wa ma valve apulasitiki ndi waukulu—kukana dzimbiri, kukana mankhwala ndi kukanda; makoma osalala mkati; kulemera kopepuka; kusavuta kuyika; kukhala ndi moyo wautali; komanso kuchepetsa mtengo wa moyo. Ubwino uwu wapangitsa kuti ma valve apulasitiki azigwiritsidwa ntchito kwambiri m'mafakitale ndi m'mafakitale monga kugawa madzi, kukonza madzi otayira, kukonza zitsulo ndi mankhwala, chakudya ndi mankhwala, malo opangira magetsi, malo oyeretsera mafuta ndi zina zambiri.
Ma valve apulasitiki amatha kupangidwa kuchokera ku zipangizo zosiyanasiyana zomwe zimagwiritsidwa ntchito m'njira zosiyanasiyana. Ma valve apulasitiki odziwika kwambiri amapangidwa ndi polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC), polypropylene (PP), ndi polyvinylidene fluoride (PVDF). Ma valve a PVC ndi CPVC nthawi zambiri amalumikizidwa ku mapaipi pogwiritsa ntchito ma socket socket osungunula, kapena ma threaded ndi flange; pomwe, PP ndi PVDF zimafuna kulumikizidwa kwa zigawo za mapaipi, kaya pogwiritsa ntchito ukadaulo wotentha, wa butt- kapena electro-fusion.

Ngakhale kuti polypropylene ili ndi theka la mphamvu ya PVC ndi CPVC, ili ndi mphamvu zambiri zotsutsana ndi mankhwala chifukwa palibe zosungunulira zodziwika. PP imagwira ntchito bwino mu acetic acid ndi hydroxides, ndipo imagwiranso ntchito ngati njira zochepetsera ma acid ambiri, alkalis, mchere ndi mankhwala ambiri achilengedwe.

PP imapezeka ngati chinthu chokhala ndi utoto kapena chopanda utoto (chachilengedwe). PP yachilengedwe imawonongeka kwambiri ndi kuwala kwa ultraviolet (UV), koma mankhwala omwe ali ndi utoto wakuda wa kaboni woposa 2.5% amakhala ndi UV yokhazikika mokwanira.

Mapaipi a PVDF amagwiritsidwa ntchito m'mafakitale osiyanasiyana kuyambira ku mankhwala mpaka ku migodi chifukwa cha mphamvu ya PVDF, kutentha kwa ntchito komanso kukana mankhwala ku mchere, ma asidi amphamvu, maziko osungunuka ndi zinthu zambiri zachilengedwe. Mosiyana ndi PP, PVDF siiwonongeka ndi kuwala kwa dzuwa; komabe, pulasitikiyo imaonekera bwino ku kuwala kwa dzuwa ndipo imatha kuwonetsa madziwo ku kuwala kwa UV. Ngakhale kuti kapangidwe ka PVDF kachilengedwe, kopanda utoto ndi kabwino kwambiri pakugwiritsa ntchito mkati, kuwonjezera utoto monga wofiira wa chakudya kungathandize kuwonetsa kuwala kwa dzuwa popanda kuwononga madzi.