Mankhwala atsopano ochulukirachulukira amakhala ndi zosakaniza zogwira mtima kwambiri (API), zomwe zimafunikira kusamala ndi kugwiritsa ntchito zida zapadera. Apa, Precision Polymer Engineering (PPE) ikuyang'ana kwambiri chifukwa chake ma valve agulugufe ogawanika amapereka mayankho otsika mtengo komanso kumvetsetsa mozama za zida zabwino kwambiri zosindikizira panjira yosindikiza.
Gawo lalikulu la mankhwala atsopano omwe akupangidwa ali ndi zosakaniza zogwira mtima kwambiri za mankhwala (APIs), zomwe zimapangitsa kuti pakhale kukula kwakukulu kwa kufunikira kwa kupanga kwawo.
Komabe, cytotoxicity ya APIs imabweretsa zovuta zambiri, kuphatikizapo kasamalidwe ka zosakaniza ndi kufunikira koyika ndalama muzotengera zapadera kuti awonetsetse kuti ogwira ntchito ndi malo awo antchito asawululidwe.
Kodi ndi chiyani chomwe chimapangitsa kuti pakhale njira yabwino yosungiramo zinthu, ndipo ndi zovuta zotani zomwe opanga amakumana nazo?
Kuwonjezeka kwa kuchuluka kwa zinthu zomwe zimagwira ntchito kwambiri komanso malamulo okhwima okhudzana ndi chitetezo ndi chilengedwe kwadzetsa kufunikira kwapadziko lonse lapansi kwa zida zosindikizira.
Mankhwala othandiza kwambiri amafuna kuti makampani asinthe kwambiri mapangidwe a zomera ndi njira zogwirira ntchito kuti atsimikizire kuti ali ndi chitetezo chokwanira. Komabe, ziyembekezo zapano za kuchuluka kwa zosungira nthawi zambiri zimaposa kuthekera kwa zida zopangidwa ndikupangidwa zaka zingapo zapitazo.
Posankha zida zosindikizira zomwe zimagwiritsidwa ntchito kwambiri, munthu ayenera kuganizira zovuta zomwe zingabuke ngati kutayikira kapena kulephera kusindikiza ma valve:
Zosakaniza zogwira ntchito kwambiri monga mahomoni, retinoids, maantibayotiki ena ndi mankhwala ena opha ululu amafunikira kuwongolera mwapadera pakukonza. Izi zimatanthauzidwa ndi malire okhudzana ndi ntchito (OEL) kapena occupational exposure band (OEB) yoperekedwa ku mankhwala osokoneza bongo.
M'mbuyomu, zida zodzitetezera zakhala zikugwiritsidwa ntchito poteteza ngozi. Komabe, ngakhale kuli kofunikira kupereka chitetezo kwa ogwira ntchito, pali chiwopsezo cha kuipitsidwa m'malo ogwirira ntchito chifukwa chakusamutsa katundu kuchokera ku zovala zoteteza komanso malo osagwira ntchito.
Pofuna kuteteza ogwiritsa ntchito zida ndikuchepetsa kuipitsidwa kwazinthu kuchokera ku ma microgram kupita ku nanograms, ndikofunikira kuti makampani opanga mankhwala apititse patsogolo njira zake zosungira.
Komabe, zovuta zimatha kubwera poyesa kupeza njira zothetsera zida ndi zida zomwe zilipo. Kutengera izi, PPE ikukhulupirira kuti kuwonjezera SBV kumatha kukhala njira yotsika mtengo, makamaka ngati zovuta za malo ndi zida zomwe zilipo zikuchepetsa zomwe zilipo. Ma valve awa atsimikizira kuti atha kukwaniritsa zolinga zomwe zili zofunika kuti agwiritse ntchito API.
Posamutsa ufa wogwira ntchito kuchokera ku sitepe imodzi kupita ku ina, SBV imachepetsa kuchuluka kwa tinthu tating'onoting'ono tomwe timawulukira mlengalenga. Chofunikira pa ma SBV onse ndikuti amapangidwa ndi magawo awiri omwe amalumikizidwa palimodzi, gawo logwira ntchito la "Alpha" ndi gawo la "Beta".
Theka lililonse limapangidwa ndi theka la "butterfly" disk, ndipo gulugufe disc imasindikizidwa pa thupi lalikulu ndi chisindikizo chotanuka kuti apange malo otsekedwa kwambiri. Zisindikizo za Elastomeric zimagwiritsidwa ntchito ngati "mipando" mkati mwa theka lililonse, ndipo zikalumikizidwa palimodzi, zimapereka chisindikizo chogwira ntchito pakati pa magawo omwe akugwira ntchito ndi osagwira ntchito.
Mavavu ndi zigawo zake za elastomer nthawi zambiri amakumana ndi mankhwala osiyanasiyana ndi zosungunulira, monga zoyeretsa zowononga. Chifukwa chake, kuyanjana kwamankhwala kwa zida za elastomer munjira iliyonse yosindikizira ndikofunikira kwambiri pamapangidwe.
Opanga mavavu akhala akudalira zinthu monga EPDM (ethylene propylene terpolymer) monga zida zopangira mipando yamagetsi ya SBV. Komabe, mphamvu ya ma API ikachulukira, zida zotanuka za elastomer zimafunikira.
PPE imalimbikitsa kugwiritsa ntchito mipando ya valve ya perfluoroelastomer (FFKM) muzinthu zowononga mankhwala. Makina abwino kwambiri a FFKM, ophatikizidwa ndi kukana kwachilengedwe konsekonse (ofanana ndi PTFE) ndi zinthu zabwino kwambiri zotenthetsera (kuchokera -30 ° C mpaka +325 ° C), zimapangitsa kuti zikhale zabwino kwa ma SBV omwe amagwiritsidwa ntchito pazosankha zapamwamba za API.
Kupyolera mu zipangizo zosavuta ndi zoganizira zakuthupi, monga kugwiritsa ntchito mpando wa FFKM m'malo mwa mpando wa EPDM ku SBV, n'zotheka kukulitsa mphamvu yogwiritsira ntchito valve yapamwamba ya hermetic popanda kukonzanso mtengo.
Nthawi yotumiza: Jul-08-2021
