Ku hambana exikarhi ka globe valve na gate valve, xana u nga hlawula njhani?

A hi ngheniseni leswaku i yini ku hambana exikarhi ka valve ya globe na avalve ya gede.

01

Xivumbeko

Loko ndhawu yo veka yi ri yitsongo, nyikela nyingiso eka ku hlawula:

Ku...valve ya gedeyinga titshega hi ntshikelelo wale xikarhi kuva yi pfala swinene ndzhawu yo pfalela, leswaku kuta fikeleriwa mbuyelo wa ku pfumaleka ka ku vupfa. Loko ku pfuriwa naku pfala, valve core na sealing surface ya valve seat switshama swiri eku hlanganiseni naku rhurhumela eka xin’wana na xin’wana, hikokwalaho sealing surface ya olova ku yi ambala, naswona loko thevalve ya gedeyi le kusuhi no pfala, ku hambana ka ntshikelelo exikarhi ka le mahlweni na le ndzhaku ka phayiphi i kukulu swinene, leswi endlaka leswaku ku onhaka ka vuandlalo byo pfalela swinene.

Xivumbeko xa...valve ya gedeyi ta va yi rharhanganile ku tlula valve ya globe, hi ku ya hi langutelo ra xivumbeko, eka xiyimo xa caliber leyi fanaka, valve ya gede yi le henhla ku tlula valve ya globe, naswona valve ya globe yi lehe ku tlulavalve ya gede. Ku engetela kwalaho, ku...valve ya gedeyi avanyisiwile hi nhonga yo vangama na nhonga ya ntima. Tivalvu to pfala a ti endli tano.

Ndlela leyi swi tirhaka ha yona

Loko valve ya globe yi pfuriwile no pfariwa, i nsinya lowu tlakukeke, leswi vulaka leswaku loko vhilwa ra voko ri rhendzeleka, vhilwa ra voko ri ta rhendzeleka ri tlakuka na nsinya. Ku...valve ya gedei ku rhendzeleka ka vhilwa ra voko ku endla leswaku nsinya wa valve wu endla ku famba-famba ko tlakusa, naswona xiyimo xa vhilwa ra voko hi roxe ri tshama ri nga cinci.

Mimpimo ya ku khuluka ya hambana, nati valve ta gedeswi lava ku pfala hi ku helela kumbe ku pfala hi ku helela, kasi ti- globe valve a ti endli tano. Valve ya globe yina tlhelo leri vekiweke ro nghena na ro huma, naswonavalve ya gedea yi na swilaveko swa nkongomiso wo nghena na ku huma.

Ku engetela kwalaho, ku...valve ya gedentsena yi na swiyimo swimbirhi: ku pfuleka hi ku helela kumbe ku pfala hi ku helela, naswona xitsalo xa ku pfula na ku pfala ka pulati ya gede i xikulu swinene, naswona nkarhi wo pfula na ku pfala i wo leha. Ku famba ka stroke ya valve plate ya globe valve i yitsongo swinene, naswona valve plate ya globe valve yinga yima eka ndzhawu yokarhi leyi fambafambaka kuva yi lulamisiwa ku khuluka. Ku...valve ya gedeyi nga tirhisiwa ntsena eka ku tsemiwa naswona a yi na mintirho yin’wana.

Ku hambana ka matirhelo

Valve ya globe yinga tirhisiwa eka ku tsema na ku lawula ku khuluka. Ku tiya ka mati ya valve ya globe i kukulu swinene, naswona swa tika swinene ku pfula na ku pfala, kambe hikuva mpfhuka exikarhi ka valve plate na ndzhawu yo pfalela wu komile, stroke yo pfula na yo pfala yi komile.

Hikuva ku...valve ya gedeyinga pfuriwa ntsena hiku hetiseka no pfala, 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 kavalve ya gedeswi ta hlayisa ntirho swinene, kambe pulati ya gede yi le kule swinene ni laha yi pfalaka kona, naswona nkarhi wo pfula ni wo pfala wu lehe.

04

Ku vekiwa na nkongomiso wa ku khuluka

Vuyelo bya kuvalve ya gedendlela yo khuluka eka matlhelo hamambirhi ya fana, a ku na xilaveko xa ndlela yo nghena na yo huma ya ku vekiwa, naswona xitirhisiwa xi nga khulukela eka matlhelo hamambirhi. Valve ya globe yifanele ku vekiwa hiku landza swinene tlhelo leri funghiweke hi museve wa miri wa valve, naswona kuna mphakelo lowu nga erivaleni eka tlhelo ra ku nghena na ku huma ka valve ya globe, naswona ndlela yo khuluka ya valve ya globe yi amukeriwa kusuka ehenhla kuya ehansi kuya hi “ku cinca kanharhu” ka valve ya China.

Valve yo pfala yi le hansi endzeni naswona yi le henhla ehandle, naswona ku suka ehandle ku na phayiphi leyi nga erivaleni leyi nga riki eka levele ya phase yin’we. Ku...valve ya gedendlela yo khuluka yi le ka layini leyi nga etlhelo. Xitlhavi xa kuvalve ya gedeyikulu ku tlula ya valve ya globe.

Kuya hi mavonelo ya flow resistance, loko yi pfulekile hiku hetiseka, flow resistance ya gate valve i yitsongo, naswona flow resistance ya load stop valve yikulu. Xiringaniso xa ku lwisana na ku khuluka xa ntolovelovalve ya gedei kwalomu ka 0.08~0.12, matimba yo pfula na yo pfala i matsongo, naswona xitirhisiwa xa le xikarhi xi nga khulukela eka matlhelo mambirhi. Ku tiya ka ku khuluka ka ti globe valve leti tolovelekeke i 3-5 times that ofti valve ta gede.Ku pfula naku pfala swilava ku sindzisiwa ku pfala kuva swifikeleriwa ku pfariwa, spool ya globe valve yi pfariwile hiku hetiseka loko yi hlangana na sealing surface, hikokwalaho ku onhaka ka sealing surface swintsongo swinene, hikokwalaho ka ku khuluka lokukulu ka matimba lamakulu ku engetela actuator ya globe valve yifanele ku nyikela nyingiso eka torque control mechanism adjustment.

Kuna tindlela timbirhi to veka globe valve, yin’wana hileswaku medium yinga nghena kusuka ehansi ka spool, vuyelo bya kona hileswaku ku pakiwa akuri na ntshikelelo loko valve yi pfariwile, leswinga engetela vutomi bya ntirho wa ku paka, naswona swinga siva ku pakiwa loko phayiphi leyinga emahlweni ka valve yiri ehansi ka ntshikelelo; Leswi nga riki swinene hileswaku torque yo chayela ya valve yikulu, leyi nga kwalomu ka 1 times ya ku khuluka ka le henhla, 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 tirhisa medium leyi khulukaka kusuka e henhla. (Ti valve ta globe ta gezi hi ntolovelo ti tirhisa medium ku nghena kusuka ehenhla.) Ku pfumaleka ka ndlela yo nghena eka media kusuka ehenhla swihambanile kahle na ndlela yo nghena yale hansi.

05

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 core ya valve yi wa, yi ringana na ku pfala ka valve (loko ku hambana ka ntshikelelo ku ri kukulu, hi ntiyiso, ku pfala a ku tiyile, kambe mbuyelo wo kambela a wu bihanga), thevalve ya gedeyi pfaleriwile hi tlhelo ra valve core gate plate, mbuyelo wo pfariwa a wu kahle ku fana na globe valve, naswona valve core a yi nge wi ku fana na globe valve leyi ringanaka na ku pfala ka valve.