Ti valve ta globe, ti gate valve, ti butterfly valves, ti check valves na ti ball valve hinkwato i swiphemu swa vulawuri leswinga lavekiki eka tisisiteme tohambana hambana ta tiphayiphi namuntlha. Valve yin’wana na yin’wana yihambanile hi xivumbeko, xivumbeko hambi kuri ku tirhisiwa ka ntirho. Hambiswiritano, valve ya globe na valve ya gede swina kufana kun’wana hiku languteka, naswona hi nkarhi lowu fanaka swina ntirho wa truncation eka phayiphi, hikokwalaho kutava na vanghana votala lava vanga na vuxaka byotala na valve kuva va pfilunganya leswimbirhi. Entiyisweni, loko u languta kahle, ku hambana exikarhi ka valve ya globe ni valve ya gede ka ha ri kukulu swinene.
- Xivumbeko
Eka xiyimo xa ndhawu yo veka leyi nga nyawuriki, swa laveka ku nyikela nyingiso eka ku hlawuriwa ka:
Valve ya gede yinga pfariwa swinene na ndzhawu yo pfalela hiku titshega hi ntshikelelo wale xikarhi, leswaku kuta fikeleriwa mbuyelo wa ku pfumaleka ka ku vupfa. Loko ku pfuriwa naku pfala, valve spool na valve seat sealing surface switshama swiri eku hlanganiseni naswona swi khumbana, hikokwalaho ka sweswo ndzhawu yo pfalela ya olova ku ambala, naswona loko valve ya gede yiri ekusuhi naku pfala, ku hambana ka ntshikelelo exikarhi ka le mahlweni nale ndzhaku ka phayiphi swiva swikulu swinene, leswi endlaka leswaku ndzhawu yo pfalela yi ambala swinene.
Xivumbeko xa valve ya gede xitava xi rharhanganile kutlula valve ya globe, kusuka eka mavonelo ya xivumbeko, eka xiyimo xa caliber leyi fanaka, valve ya gede yile henhla kutlula valve ya globe, naswona valve ya globe yi lehe kutlula valve ya gede. Ku engetela kwalaho, valve ya gede yi avanyisiwile hi nhonga yo vangama na nhonga ya ntima. Valve ya globe a yi tano.
- Ntirho
Loko valve ya globe yi pfuriwile no pfariwa, i muxaka wa nsinya lowu tlakukeke, leswivulaka leswaku vhilwa ra voko ra rhendzeleka, naswona vhilwa ra voko rita endla ku rhendzeleka naku tlakusa ku famba xikan’we na nsinya wa valve. Valve ya gede yifanele ku jikajika handwheel, leswaku nsinya wu endla ntirho wo tlakusa, naswona ndzhawu ya handwheel hi yoxe yitshama yirikarhi yi cinca.
Ti flow rates ta hambana, laha ti gate valves ti lavaka ku pfala hiku hetiseka kumbe hiku hetiseka, kasi ti globe valves ati lavi. Valve ya globe yina tlhelo leri vekiweke ro nghena na ro huma, naswona valve ya gede ayi na swilaveko swa tlhelo ro nghenisa naku rhumela ehandle.
Ku engetela kwalano, valve ya gede yi pfulekile ntsena hiku hetiseka kumbe yi pfariwile hiku hetiseka swiyimo swimbirhi, ku pfuriwa ka gede naku pfala ka stroke swikulu swinene, nkarhi wo pfula naku pfala wu lehe. Valve plate movement stroke ya globe valve yitsongo swinene, naswona valve plate ya globe valve yinga yima eka ndzhawu yokarhi leyi fambafambaka kuva yi lulamisiwa ku khuluka. Valve ya gede yinga tirhisiwa ntsena eka truncation naswona ayi na ntirho wun’wana.
- Matirhelo
Valve ya globe yinga tirhisiwa eka truncation xikan’we naku lawula ku khuluka. Ku tiya ka mati ya valve ya globe i kukulu swinene, naswona swa tika swinene ku pfula naku pfala, kambe hikuva valve plate yi komile kusuka eka ndzhawu yo pfalela, stroke yo pfula na yo pfala yi komile.
Hikuva valve ya gede yinga pfuleka ntsena hiku hetiseka naswona yi pfariwile hiku hetiseka, loko yi pfuriwile hiku hetiseka, ku lwisana ka ku khuluka ka le xikarhi eka channel ya miri wa valve swile kusuhi na 0, hikokwalaho ku pfuriwa naku pfala ka valve ya gede swita hlayisa ntirho swinene, kambe gate plate yile kule swinene na ndzhawu yo pfala, naswona nkarhi wo pfula naku pfala wu lehe.
- Ku vekiwa na nkongomiso wa ku khuluka
Vuyelo bya valve ya gede leyi khulukaka eka matlhelo hamambirhi bya fana, naswona a ku na xilaveko xa tlhelo ro nghena na ro huma ra ku vekiwa, naswona medium yi nga khulukela eka matlhelo hamambirhi. Valve ya globe yifanele ku vekiwa hiku landza swinene na tlhelo ra ku tivisiwa ka miseve ya miri wa valve, naswona kuna mphakelo lowu nga erivaleni eka tlhelo ra ku nghenisiwa naku rhumeriwa ka valve ya globe, naswona tlhelo ra ku khuluka ka valve ya globe “three to” e China i kusuka ehenhla kuya ehansi.
Valve ya globe yile hansi endzeni naswona yile henhla ehandle, naswona kusuka e handle kuna tiphayiphi letinga erivaleni letinga eka levele ya phase. Xitsutsumi xa valve ya gede xi le ka layini leyi nga etlhelo. Xitroko xa valve ya gede xikulu kutlula xa valve ya globe.
Kuya hi mavonelo ya flow resistance, flow resistance ya gate valve i yitsongo loko yi pfulekile hiku hetiseka, naswona flow resistance ya load stop valve yikulu. Flow resistance coefficient ya ordinary gate valve yi kwalomu ka 0.08~0.12, matimba yo pfula na yo pfala i matsongo, naswona medium yinga khuluka eka matlhelo mambirhi. Ku tiya ka ku khuluka ka ti valve to pfala leti tolovelekeke i 3-5 times eka ti gate valves. Loko ku pfula no pfala, swa laveka ku sindzisa ku pfala ku fikelela ku pfariwa, spool ya valve ya valve ya globe yi hlangana ntsena na ndzhawu yo pfalela loko yi pfariwile hi ku helela, hikwalaho ku ambala ka vuandlalo byo pfalela i kutsongo swinene, hikuva ku khuluka ka matimba lamakulu ku lava ku engetela actuator Ya valve ya globe yi fanele ku nyikela nyingiso eka ku lulamisiwa ka endlelo ro lawula torque.
Valve ya globe yina tindlela timbirhi to veka, yin’wana hileswaku medium yinga nghena kusuka ehansi ka valve spool, vuyelo bya kona hileswaku loko valve yi pfariwile, ku paka kungari ehansi ka ntshikelelo, vutomi bya vutirheli bya ku paka byinga engeteriwa, naswona ntirho wo cinca ku paka wunga endliwa ehansi ka ntshikelelo eka phayiphi emahlweni ka valve; xiphiqo xa kona hileswaku torque yo chayela ya valve yikulu, leyi nga kwalomu ka 1 times ya ku khuluka ka le henhla, naswona matimba ya axial ya nsinya wa valve i makulu, naswona nsinya wa valve wu olova ku goveka.
Hikokwalaho, ndlela leyi hi ntolovelo yi lulamerile ntsena eka ti globe valves ta diameter leyintsongo (DN50 kumbe ehansi), naswona ti globe valves tale henhla ka DN200 ti hlawuriwa eka ndlela ya media leyi khulukaka kusuka ehenhla. (Tivalvu to pfala gezi hi ntolovelo ti tirhisa xitirhisiwa lexi ku nghena ku suka ehenhla.) Ku pfumaleka ka ndlela leyi swihaxa-mahungu swi nghenaka ha yona ku suka ehenhla swi hambanile swinene ni ndlela leyi swi nghenaka ha yona ehansi.
- Ku pfalela
Vuandlalo byo pfalela bya valve ya globe i tlhelo lerintsongo ra trapezoidal ra valve core (hi ku kongoma languta xivumbeko xa valve core), loko valve core yi wa, yi ringana na ku pfala ka valve (loko ku hambana ka ntshikelelo ku ri kukulu, hi ntiyiso, ku pfala a ku tika, kambe mbuyelo wo tlhelela endzhaku a wu bihanga), valve ya gede yi pfaleriwile hi tlhelo ra valve core gate plate, mbuyelo wo pfalela a wu kahle ku fana na valve ya globe, na valve core a yi nge wi ku fana na valve ya globe.
Nkarhi wa poso: Apr-01-2022
