Hikwalaho ka ntirho wa sealing element yo kavanyeta naku hlanganisa,ku lawula naku hangalasa, ku hambanyisa naku hlanganisa media eka valvpassage, sealing surface yitala kuva ehansi ka corrosion, erosion, naku onhaka hi media, leswi endlaka leswaku yiva na ku onhaka swinene.
Marito ya nkoka: .vuandlalo byo pfalela;ku bola;ku khuluka;ku ambala
Kuna swivangelo swimbirhi swa ku onhaka ka ndzhawu leyi pfaleriweke: ku onhaka ka vanhu na ku onhaka ka ntumbuluko. Ku onhaka ka vanhu ku vangiwa hi swilo swo tanihi pulani yo biha, vumaki, ku hlawuriwa ka swilo, ku vekiwa loku nga fanelangiki, ku tirhisiwa loku nga riki kahle ni ku hlayisa. Ku onhaka ka ntumbuluko i ku onhaka ka swiyimo swa ntolovelo swa ntirho swa valve naswona swivangiwa hiku bola lokunga papalatekiki xikan’we naku khuluka ka ndzhawu yo pfalela hi swihangalasamahungu.
Swivangelo swa ku onhaka ka vuandlalo byo pfalela swi nga katsakanyiwa hi ndlela leyi landzelaka:
Khwalithi ya kahle ya michini ya ndzhawu yo pfalela: Leswi swivonaka ngopfu eka swihoxo swofana na ku pandzeka, ti pores, na ku katsa eka ndzhawu yo pfalela. Leswi swivangiwa hiku hlawuriwa lokunga fanelangiki ka swipimelo swa welding na heat treatment, xikan’we na matirhelo yoka yanga kahle hinkarhi wa welding na heat treatment. Ku tiya ka ndzhawu yo pfalela swile henhla swinene kumbe ehansi swinene hikokwalaho ka ku hlawuriwa ka swilo leswinga fanelangiki kumbe ku hisa lokunga fanelangiki. Ku nonoka lokunga ringaniki ka ndzhawu yo pfalela xikan’we naku tsandzeka ku lwisana na corrosion swivangiwa ngopfu hiku pfurheta nsimbi leyinga ehansi eka xivumbeko xa welding, leswi hungutaka xivumbeko xa alloy ya ndzhawu yo pfalela. I ntiyiso leswaku timhaka ta dizayini na tona ti kona emhakeni leyi.
Ku onhaka loku vangiwaka hi ku hlawula na ku tirhisiwa loku nga fanelangiki: Leswi swi vonaka ngopfu hi ku tsandzeka ku hlawulavalves kuya hi swiyimo swa ntirho, hiku tirhisa valve yo pfala tani hi valve yo throttling, leswi endlaka leswaku kuva na ntshikelelo wo tlula mpimo hi nkarhi wa ku pfala, ku pfala hiku hatlisa, kumbe ku pfala lokunga helelangiki, leswi vangaka ku khuluka na ku onhaka eka ndzhawu yo pfalela. Ku vekiwa loku hoxeke na ku hlayisiwa loku nga riki kahle swi endla leswaku ku tirha hi ndlela leyi nga tolovelekangiki ka ndhawu yo pfalela, leswi vangakavalveku tirha hi vuvabyi na ku onha ka ha ri na nkarhi laha ku pfalaka kona.
Chemical corrosion ya medium: Medium leyi rhendzeleke ndzhawu yo pfalela yi endla ti khemikhali na ndzhawu yo pfalela handle ko humesa current, yi corroding ndzhawu yo pfalela. Ku bola ka tikhemikhali ta gezi, ku khumbana exikarhi ka swiphemu swo pfalela, ku khumbana exikarhi ka vuandlalo byo pfalela na miri wo pfala navalvemiri, xikan’we naku hambana eka nhlayo na oxygen ya medium, hinkwaswo swihumesa ku hambana lokunga kona, leswi vangaka electrochemical corrosion xikan’we naku corroding anode-side sealing surface.
Ku khuluka ka medium: Leswi swivangiwa hiku onhaka, ku khuluka, na cavitation ya sealing surface loko medium yi khuluka. Hi rivilo rokarhi, swiphemu leswintsongo leswi papamalaka eka medium swi tlumbana na sealing surface, leswi vangaka ku onhaka ka ndzhawu liya. Xitirhisiwa lexi khulukaka hi rivilo lerikulu xi khuluka hiku kongoma laha ku pfaleriwaka kona, leswi vangaka ku onhaka ka ndzhawu liya. Loko medium yi hlangana naswona yiva vaporize hi xiphemu, ti bubbles ta pfurha naswona ti khumba ndzhawu leyi pfalaka, leswi endlaka leswaku kuva na ku onhaka ka ndzhawu liya. Ku hlanganisiwa ka erosion na chemical corrosion ya medium swi onha swinene ndzhawu yo pfalela.
Ku onhaka ka michini: Ndhawu leyi pfalaka yi ta khwaxa, yi tshoveka ni ku tsindziyela hi nkarhi wa ku pfula ni ku pfala. Ti athomo exikarhi ka swiphemu swimbirhi swo pfalela ti nghena ehansi ka mahiselo yale henhla na ntshikelelo, leswi humesaka xiendlakalo xa ku namarhela. Loko swiphemu swimbirhi swo pfalela swi famba-famba loko swi pimanisiwa, ndhawu leyi namarhelaka yi handzuka hi ku olova. Loko ku ri ehenhla ka roughness ya sealing surface, switala kuva xiendlakalo lexi xihumelela. Loko valve yi pfariwile, valve disc yita hlangana naku tsindziyela ndzhawu yo pfalela, leswi endlaka leswaku kuva na ku onhaka ka ndzhawu kumbe ku nghena eka ndzhawu yo pfalela.
Ku onhaka ka ku karhala: Vuandlalo byo pfalela byi va na ndzhwalo lowu cincanaka loko ku tirhisiwa nkarhi wo leha, leswi vangaka ku karhala naswona swi endla leswaku ku va na ku pandzeka na ku delamination. Rhaba na plastiki switala ku dyuhala endzhaku ko tirhisiwa nkarhi woleha, leswi endlaka leswaku kuhunguteka matirhelo. Ku suka eka nxopaxopo wa swivangelo leswi nga laha henhla swa ku onhaka ka vuandlalo bya ku pfalela, swi nga voniwa leswaku leswaku ku antswisiwa khwalithi na vutomi bya vutirheli bya swiphemu swo pfalela swa valve, switirhisiwa swa le henhla swo pfalela leswi faneleke, swivumbeko swo pfalela leswi ringaneleke, na tindlela to lulamisa swi fanele ku hlawuriwa.
TWS valve ngopfu ngopfu yi tirhana navalve ya phaphatani leyi tshameke hi rhaba, Valve ya gede, Y-xigwitsirisi, valve yo ringanisela, Valve yo kambela wafe, sw.sw.
Nkarhi wa poso: May-13-2023
