Kufikira Kufikira Kwa Mavavu Apulasitiki

Ngakhale mavavu apulasitiki nthawi zina amawoneka ngati chinthu chapadera-chisankho chapamwamba cha omwe amapanga kapena kupanga zida zamapaipi apulasitiki pamafakitale kapena omwe ayenera kukhala ndi zida zoyeretsera kwambiri - poganiza kuti ma valvewa alibe ntchito zambiri ndi zazifupi. wowona. Zoonadi, ma valve apulasitiki masiku ano ali ndi ntchito zambiri monga momwe mitundu yowonjezera ya zipangizo ndi okonza abwino omwe amafunikira zipangizozo amatanthauza njira zowonjezereka zogwiritsira ntchito zida zosunthikazi.

ZINTHU ZA PLASTIC
Ubwino wa mavavu apulasitiki ndi otakata-kudzimbirira, kukana mankhwala ndi abrasion; makoma amkati osalala; kulemera kochepa; mosavuta kukhazikitsa; kuyembekezera moyo wautali; ndi kutsika mtengo kwa moyo. Ubwino umenewu wapangitsa kuti ma valve apulasitiki avomerezedwe m'zinthu zamalonda ndi mafakitale monga kugawa madzi, kuyeretsa madzi otayira, kukonza zitsulo ndi mankhwala, chakudya ndi mankhwala, mafakitale opangira magetsi, mafuta opangira mafuta ndi zina.
Mavavu apulasitiki amatha kupangidwa kuchokera kuzinthu zosiyanasiyana zomwe zimagwiritsidwa ntchito pamasinthidwe angapo. Mavavu apulasitiki odziwika kwambiri amapangidwa ndi polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC), polypropylene (PP), ndi polyvinylidene fluoride (PVDF). Mavavu a PVC ndi CPVC nthawi zambiri amalumikizana ndi mapaipi pogwiritsa ntchito ma socket sockets, kapena ulusi ndi nsonga zopindika; pomwe, PP ndi PVDF zimafuna kulumikiza zida zamapaipi, mwina ndi matekinoloje a kutentha, matako kapena ma electro-fusion.

Ngakhale polypropylene ili ndi theka la mphamvu za PVC ndi CPVC, imakhala ndi mphamvu zambiri zotsutsana ndi mankhwala chifukwa palibe zosungunulira zodziwika. PP imagwira ntchito bwino mu ma acetic acid ndi ma hydroxides, komanso ndiyoyeneranso njira zochepetsera ma acid ambiri, ma alkali, mchere ndi mankhwala ambiri achilengedwe.

PP imapezeka ngati zinthu zamtundu kapena zopanda pigmented (zachilengedwe). Natural PP imawonongeka kwambiri ndi cheza cha ultraviolet (UV), koma mankhwala omwe ali ndi 2.5% ya carbon black pigmentation ndi UV yokhazikika mokwanira.

PVDF mapaipi amagwiritsidwa ntchito m'mafakitale osiyanasiyana kuchokera ku mankhwala kupita ku migodi chifukwa cha mphamvu ya PVDF, kutentha kwa ntchito ndi kukana kwa mankhwala amchere, ma asidi amphamvu, zosungunulira ndi zosungunulira zambiri. Mosiyana ndi PP, PVDF sichidetsedwa ndi kuwala kwa dzuwa; komabe, pulasitiki ndi yowonekera ku kuwala kwa dzuwa ndipo imatha kuyika madziwa ku radiation ya UV. Ngakhale mawonekedwe achilengedwe, opanda pigment a PVDF ndi abwino kwambiri pakuyeretsa kwambiri, kugwiritsa ntchito m'nyumba, kuwonjezera pigment ngati chakudya chofiira kumapangitsa kuti pakhale kuwala kwadzuwa popanda vuto lililonse pamadzimadzi.