Ukukhetha izinto ezifanelekileyo zevalvu yokucima umlilo kubalulekile ukuqinisekisa ukusebenza kwexesha elide kunye nokuthembeka. I-aluminium kunye nebronze, ezona zinto zimbini zixhaphakileyo, zibonelela ngeenzuzo ezahlukeneyo. I-aluminium ilula kwaye ixabisa kancinci, ngelixa ibronze inika amandla aphezulu kunye nokumelana nokugqwala. Kwizicelo ze-OEM, ukukhethwa kwezinto kuchaphazela ngokuthe ngqo ukuqina kunye nokusebenza. Izixhobo ezisemgangathweni ophezulu, ezifana neentsimbi ezimelana nokugqwala, zinceda iivalve ukuba zimelane neendawo ezinzima kunye nokusetyenziswa ixesha elide. Ukukhetha okubi kunokukhokelela ekugugeni okanye ekusileleni kwangethuba. I-aluminium ifanelana nezicelo ezifuna izinto ezikhaphukhaphu, ngelixa ibronze igqwesa kwiindawo ezifuna ukuqina okuphuculweyo.

Izinto ezibalulekileyo ekufuneka ziqwalaselwe

• Khetha i-aluminium ukuba ufuna iivalvu zokucima umlilo ezikhaphukhaphu nezingabizi kakhulu. Ubunzima bayo obuphantsi buyenza kube lula ukuyisebenzisa nokuyifakela, nto leyo egcina imali emsebenzini.
• Yiya nobheduiivalvu eziqinileyo neziqinileyokwiimeko ezinzima. Ibrass isebenza kakuhle phantsi koxinzelelo olukhulu kwaye ihlala ixesha elide.
• Cinga ngokukhusela umhlwa xa ukhetha izinto. I-aluminium inomaleko wendalo othintela umhlwa, kodwa ubhedu lufuna ukunyanyekelwa kwiindawo ezimanzi.
• Jonga kwiiindleko zizonke ngokuhamba kwexeshaI-aluminium ibiza kancinci ukuyithenga nokuyilungisa, kodwa ithusi lihlala ixesha elide, nto leyo enokwenza ixabiso layo eliphezulu libe nexabiso.
• Qinisekisa ukuba iivalvu ziyayilandela imithetho yokhuseleko. Qinisekisa ukuba zineziqinisekiso ezifana ne-UL, i-FM, kunye ne-ISO zokhuseleko kunye nokuthenjwa.

Iimpawu zezinto ezisetyenziswa kwiivalvu ze-Fire Hydrant Valve

Amandla kunye Nokuqina

Amandla eAluminiyam

Xa kufikwa kumandla, i-aluminium inika umlinganiselo omangalisayo wamandla nobunzima. Ngokuxhomekeke kwi-alloy, amandla ayo okutsalwa aqala kwi-70 MPa ukuya kwi-700 MPa. Oku kuyenza ibe lukhetho oluguquguqukayo kwiizicelo ezifuna izinto ezilula kodwa ezihlala ixesha elide. Ii-alloy ze-aluminium ezinamandla aphezulu, ezifana ne-7075-T6, zinokudlula ithusi ngamandla okutsalwa ngelixa zigcina ubunzima obuphantsi kakhulu. I-aluminium ikwagqwesa kwiimeko zokulayisha eziguquguqukayo, njengoko ukuguquguquka kwayo kuyivumela ukuba ifunxe kwaye isasaze uxinzelelo ngokufanelekileyo. Oku kuyenza ifaneleke ngakumbi kwiivalvu zomlilo ezisetyenziswa kwiindawo ezinoxinzelelo olukhulu.

Amandla eBrass

Kwelinye icala, ibrass yaziwa ngamandla ayo okutyhala aqinileyo, aqhele ukuba phakathi kwe-250 MPa ukuya kwi-500 MPa. Ubunzima bayo obuphakathi kunye nokuqina kwayo kuyenza ilungele ukusetyenziswa kakhulu apho amandla abalulekileyo. Ngokungafaniyo ne-aluminium, ibrass inika ukusebenza okuzinzileyo phantsi kwemithwalo engashukumiyo, nto leyo eyenza ukuba ibe lukhetho oluthembekileyo kwiivalvu zombhobho womlilo kwiimeko ezinzima. Ukukwazi kwayo ukumelana nokuguguleka ngokuhamba kwexesha kuqinisekisa ukusebenza okuhlala ixesha elide, ingakumbi kwiindawo zoshishino.

Ukumelana nokugqwala

Ukumelana nokugqwala kweAluminiyam

I-aluminium ihlukile ngenxa yayoukumelana nokugqwala okugqwesileyo, ngenxa yomaleko wayo wendalo we-oxide. Olu maleko lukhusela izinto ekufumeni nasekungcoleni, nto leyo eyenza ukuba zilungele iimeko zangaphandle. Iivalvu zombhobho womlilo ezenziwe nge-aluminium zisebenza kakuhle kwiimeko ezinzima, kuquka ukuvezwa yimvula, ukufuma, kunye nongcoliseko. Olu qina lunciphisa isidingo sokugcinwa rhoqo, ukuqinisekisa ukuthembeka kwexesha elide.

Ukumelana nokugqwala kweBrass

I-brass, nangona ihlala ixesha elide, isengozini yokungcoliswa nokubola kwiindawo ezifumileyo okanye ezityebileyo nge-chloride. Ezi zinto zinokwenza buthathaka isakhiwo sayo ngokuhamba kwexesha. Nangona kunjalo, ngokugcinwa kakuhle kunye nokukhusela, i-brass isenokwenza kakuhle kwiindawo ezingangcolisiyo kakhulu. Kwiivalvu zombhobho womlilo ezisetyenziswa kwiindawo ezilawulwayo, i-brass iseyindlela efanelekileyo.

Ubunzima kunye nokuphathwa

Iingenelo Ezilula zeAluminiyam

Ubunzima obuphantsi be-aluminium obuyi-2.70 g/cm³ buyenza ibe lula kakhulu kunethusi. Olu hlobo lulula lwenza kube lula ukuphatha nokufakela, ingakumbi xa kusetyenzwa apho ubunzima bubaluleke kakhulu. Iivalvu zombhobho womlilo ezenziwe nge-aluminium kulula ukuzithutha nokuzifaka, nto leyo enciphisa iindleko zomsebenzi kunye nomgudu. Olu ncedo luluncedo ngakumbi kwiiprojekthi ezinkulu okanye kwiindawo ezikude.

Iimpembelelo zoBunzima bukaBrass

I-brass, enobunzima obuqala kwi-8.4 ukuya kwi-8.7 g/cm³, inzima kakhulu kune-aluminium. Nangona obu bunzima bongezelelekileyo bunegalelo ekomeleleni nasekuqineni kwayo, bunokubangela imingeni ngexesha lokuphathwa nokufakelwa. Iivalvu zombhobho womlilo ezenziwe nge-brass zinokufuna inkxaso eyongezelelweyo okanye izixhobo zokufakela, nto leyo enyusa iindleko zeprojekthi iyonke. Nangona kunjalo, ubunzima obongezelelekileyo bunokubonelela ngozinzo kwizicelo ezithile, nto leyo eyenza i-brass ibe lukhetho olukhethwayo kwiimeko ezithile.

Ingqwalasela yeendleko zeevalvu zoMbane

Iindleko zokuqala zezinto zokwakha

Ixabiso leAluminiyam

I-aluminium inikezelaisisombululo esingabizi kakhulukwiivalvu zombhobho womlilo. Ubuninzi bayo kunye nokulula kokuveliswa kwayo kuncedisa ekufikeleleni kwayo. Xa kuthelekiswa nobhedu, i-aluminium inexabiso eliphantsi, nto leyo eyenza ukuba ibe lukhetho olunomtsalane kwiinkampani ze-OEM ezijolise ekunciphiseni iindleko zokuqala. Ukongeza, ukukwazi kwayo ukuphinda isetyenziswe kuqinisekisa ukufumaneka rhoqo, kunciphisa umngcipheko wokuguquguquka kwamaxabiso.

Ixabiso leBrass

I-brass, nangona ihlala ixesha elide kwaye ithembekile, idla ngokuba njalokubiza kakhulu ngenxaumxholo wayo wekopolo kunye nenkqubo yokuvelisa edinga amandla amaninzi. Umzekelo:

• Iivalvu zomlilo zebrass zihlala ziqala kwi-$0.15 ukuya kwi-$5 ngesiqwenga ngasinye.
• Iivalvu zomlilo zaseStorz, ezidla ngokusebenzisa ubhedu, ziqala kwi-$12.00 ukuya kwi-$16.00.

Ezi ndleko ziphezulu zibonisa amandla kunye nokusebenza kwezixhobo kodwa zinokuba ngumceli mngeni kwiiprojekthi ezijongana nohlahlo-lwabiwo mali.

Iindleko Zokugcinwa Kwexesha Elide

Ukugcinwa kweeValve zeAluminiyam

Iivalvu ze-aluminiyam azifuni ukugcinwa kakuhle ngenxa yokumelana kwazo nokugqwala kwendalo. Umaleko we-oxide owakheka kwiindawo ze-aluminiyam ukhusela ekonakaleni kwendalo, nto leyo enciphisa isidingo sokulungiswa rhoqo okanye ukutshintshwa. Olu phawu lwenza i-aluminiyam ibe lukhetho olungabizi kakhulu lokusetyenziswa ixesha elide kwiimeko zangaphandle okanye ezifumileyo.

Ukugcinwa kweeValve zeBrass

Iivalvu zebrass zifuna ingqwalasela engakumbi ukuze zigcine ukuthembeka kwazo. Kwiindawo ezityebileyo ngekloride okanye ezifumileyo kakhulu, ibrass inokuphulukana nokukhanya, nto leyo eyenza buthathaka impahla ngokuhamba kwexesha. Ukuhlolwa rhoqo kunye neengubo zokukhusela ziyafuneka ukuze kwandiswe ubomi beevalvu zebrass fire hydrant. Nangona la manyathelo eqinisekisa ukuqina, akwanyusa iindleko zokulungisa.

Ixabiso lomjikelo wobomi

Ixabiso lilonke lobunini be-aluminium

I-Aluminium inika ixabiso elihle kakhulu ngenxa yeendleko zayo zokuqala eziphantsi kunye neemfuno ezincinci zokugcinwa. Ubunzima bayo bunciphisa iindleko zothutho kunye nokufakelwa, nto leyo ephucula ngakumbi ukusebenza kwayo kakuhle. Ukongeza, ukuzinza kunye nokuphinda isetyenziswe kwe-aluminum kunceda ekuthandeni kwayo kwiiprojekthi ezikhathalela okusingqongileyo.

Ixabiso lilonke lobunini beBrass

I-Brass inika ixabiso eliphezulu kwangaphambili kodwa ihlawula ukuqina kwayo kunye nokuthembeka kwayo kwiimfuno ezifuna ukhathalelo. Nangona ifuna ukulungiswa okungakumbi, ukukwazi kwayo ukumelana nokuguguleka kuqinisekisa ukusebenza kwayo ixesha elide. Kumashishini abeka phambili amandla kunye nokusebenza, i-brass ihlala ilutyalo-mali oluxabisekileyo.

Itheyibhile yokuthelekisa

Ukufaneleka kweValvu zoMbane woMlilo

Izinto eziphathelele indalo

I-Aluminiyam kumaqondo obushushu aphezulu

I-Aluminium isebenza kakuhle kwiimeko zobushushu obugqithisileyo ngenxa yokuqhuba kwayo kakuhle kobushushu kunye nokumelana nokwanda kobushushu. Oku kwenza ukuba ibe lukhetho oluthembekileyo kwiivalvu ze-fire hydrant ezivezwe kumaqondo obushushu atshintshatshintshayo. Amandla e-Aluminium okususa ubushushu ngokukhawuleza aqinisekisa ukuba igcina ulungelelwaniso lwesakhiwo nokuba zikwimeko zobushushu obuphezulu. Ukongeza, ubume bayo obulula bunciphisa uxinzelelo kwizinto ezidityanisiweyo, nto leyo ephucula ukusebenza kwenkqubo iyonke.

Ibrass kwiqondo lobushushu eliphezulu

I-Brass inika uzinzo oluphezulu kubushushu, nto leyo eyenza ukuba ilungele ukusetyenziswa okufuna ukusebenza rhoqo kubushushu obugqithisileyo. Indawo yayo yokunyibilika ephezulu kunye nokuqina kwayo kuyivumela ukuba imelane nokuvezwa ixesha elide kubushushu obuphezulu ngaphandle kokuguquka. Iivalvu zebrass fire hydrant zisebenza kakhulu kwiindawo zoshishino apho ukumelana nobushushu kubaluleke kakhulu. Nangona kunjalo, kwiimeko zokuqandisa, ukuqina kwebrass kunokuyenza ibe lula ukuqhekeka phantsi kotshintsho olukhawulezileyo loxinzelelo.

Iimfuno Zokusebenza

I-Aluminiyam yeeNkqubo zoXinzelelo oluPhezulu

I-Aluminium igqwesile kwiinkqubo zoxinzelelo oluphezulu ezifuna ukuguquguquka kunye nokumelana nokudinwa. Ukukwazi kwayo ukufunxa nokusasaza uxinzelelo kuyenza ifaneleke ukusetyenziswa ngokuguquguqukayo kunye namazinga oxinzelelo kunye nokuhamba kwamanzi ahlukeneyo. Iingenelo eziphambili ziquka:

• Ulwakhiwo olulula, olunciphisa uxinzelelo kwinkqubo.
• Ukumelana nokudinwa okugqwesileyo, okuqinisekisa ukuqina phantsi kwemijikelo yoxinzelelo ephindaphindwayo.
• Umlinganiselo ophezulu wamandla ukuya kobunzima, oxhasa ukusebenza kakuhle kwiindawo ezifuna amandla amaninzi.

I-Brass yeenkqubo zoxinzelelo oluphezulu

I-brass yinto esetyenziswa kakhulu xa kusetyenziswa umthwalo ongashukumiyo ofuna ukuqina kunye nokumelana nokuguguleka. Ubulukhuni bayo kunye namandla ayo okutsalwa kwenza ukuba ilungele iivalvu zomlilo ezinzima ezisebenza phantsi koxinzelelo oluphezulu oluhlala luhleli. Nangona ingenakuguquguquka njenge-aluminium, i-brass inika ukuqina okungenakuthelekiswa nanto kwiinkqubo apho ukumelana nempembelelo kunye nokuthembeka kwexesha elide zezona zinto ziphambili.

Izicelo Ezithile Kushishino

I-aluminium kwizicelo ze-OEM

Iivalvu zombhobho womlilo we-aluminium zisetyenziswa kakhuluIzicelo ze-OEMngenxa yokuba zilula kwaye zingabizi kakhulu. Zifanelekile ngokukodwa kwiinkqubo ezifuna izinto ezitshintshayo okanye uhlengahlengiso olwenziwe ngokwezifiso. Ukuphinda kusetyenziswe i-aluminium kukwenza kube lukhetho olunobuhlobo nokusingqongileyo kumashishini abeka phambili ukuzinza.

I-Brass kwizicelo ze-OEM

I-brass iseyeyona nto ikhethwayo kwii-OEM ezifuna ukuqina kunye namandla. Ukukwazi kwayo ukumelana nokuguguleka kwenza ukuba ifaneleke kwiinkqubo zokukhusela umlilo kwimizi-mveliso kunye neenkqubo zokutshiza. Iivalvu ze-brass zihlala zikhethwa ngenxa yokuthembeka kwazo ekulawuleni ukuhamba kwamanzi kwimisebenzi yokulwa nomlilo.

Imigangatho Yolawulo Neyoshishino Yeevalvu Zokukhupha Umlilo

Imigangatho Efanelekileyo

Imigangatho ye-API

Ndisoloko ndigxininisa ukubaluleka kokunamathela kwimigangatho ye-API (i-American Petroleum Institute) xa ukhetha izixhobo zeevalvu zokucima umlilo. Le migangatho iqinisekisa ukuba iivalvu ziyahlangabezana nemigangatho yokusebenza engqongqo kunye nokhuseleko. Iivalvu eziqinisekiswe yi-API zibonisa ukuthembeka phantsi kweemeko zoxinzelelo oluphezulu kunye nobushushu obuphezulu. Kwii-OEM, ukuthobela imigangatho ye-API kuqinisekisa ukuba iivalvu zinokujongana neemeko zokusebenza ezifuna amandla ngaphandle kokubeka emngciphekweni ukhuseleko.

Imigangatho ye-JIS kunye ne-BS

Ukongeza kwi-API, ndihlala ndicebisa ukuba kuqwalaselwe iziqinisekiso ze-JIS (iMigangatho yoShishino yaseJapan) kunye ne-BS (iMigangatho yaseBrithani). Imigangatho ye-JIS igxile ekuchanekeni nasekusemgangathweni, nto leyo eyenza ukuba ilungele ukusetyenziswa okufuna ukuchaneka okungqongqo. Imigangatho ye-BS, kwelinye icala, igxininisa ukuqina nokhuseleko, ngakumbi kwiindawo zoshishino nezomasipala. Ngokuhlangabezana nale migangatho yamazwe ngamazwe, iivalvu zombhobho womlilo zifumana ukwamkelwa kwihlabathi liphela, ziqinisekisa ukuhambelana kunye nokuthenjwa kwiimarike ezahlukeneyo.

Iziqinisekiso kunye nokuthobela imithetho

Iziqinisekiso zeValve yeAluminiyam

Iivalvu zealuminiyam kufuneka zihambelane neziqinisekiso ezifana ne-UL (Underwriters Laboratories), i-FM (Factory Mutual), kunye ne-ISO (International Organisation for Standardization). Ezi ziqinisekiso ziqinisekisa amandla ezivalvu okumelana noxinzelelo lokusingqongileyo kunye nokugcina ukusebenza kakuhle ngokuhamba kwexesha. Ndifumanisa ukuba iziqinisekiso ze-UL kunye ne-FM zibaluleke kakhulu ekuqinisekiseni ukhuseleko lomlilo, ngelixa imigangatho ye-ISO iqinisekisa umgangatho kunye nokuhambelana kweevalvu. Ukungathobeli imithetho kunokukhokelela kwiingozi zokhuseleko kunye nemingeni yezomthetho, ngoko ke ndihlala ndibeka phambili iimveliso eziqinisekisiweyo.

Iziqinisekiso zeBrass Valve

Iivalvu zebrass nazo zifuna iziqinisekiso ze-UL, FM, kunye ne-ISO ukuze zihlangabezane nolindelo lweshishini. Ezi ziqinisekiso ziqinisekisa ukuba iivalvu zinokunyamezela iimeko ezinzima, kubandakanya uxinzelelo oluphezulu kunye neendawo ezirhabaxa. Ndihlala ndigxininisa ukuba iivalvu zebrass ezinezi ziqinisekiso zibonelela ngokuthembeka okuphuculweyo kunye nobomi obude. Kwii-OEMs, ukutyala imali kwiivalvu zebrass eziqinisekisiweyo kunciphisa umngcipheko wokusebenza kwaye kuqinisekisa ukuthotyelwa kweemfuno zomthetho.

Ingcebiso: Soloko uqinisekisa ukuba iivalvu zakho zokucima umlilo zineziqinisekiso ezifunekayo. Eli nyathelo aliqinisekisi nje kuphela ukhuseleko kodwa likwakhusela namatyala anokubakho.

I-aluminium kunye ne-bronze zibonelela ngeenzuzo ezahlukeneyo kwiivalvu ze-fire hydrant. I-aluminium inika ulwakhiwo olulula, ukusebenza kakuhle kweendleko, kunye nokumelana nokugqwala okugqwesileyo, okwenza ukuba ilungele ukusetyenziswa okuguquguqukayo okanye okukhulu. I-brass, ngamandla ayo aphezulu kunye nokuqina, igqwesa kwiindawo ezifuna ukuthembeka kwexesha elide. Ii-OEM kufuneka zibeke phambili izixhobo ezihlangabezana nemigangatho yoshishino efana ne-UL, FM, okanye iziqinisekiso ze-ISO ukuqinisekisa ukhuseleko kunye nokuthobela. Ukukhetha iintsimbi ezimelana nokugqwala kuphucula ukuqina, kunciphisa iindleko zokugcina, kwaye kwandisa ubomi benkqubo. Ukulungelelanisa ukhetho lwezinto kunye neenjongo zokusebenza kuqinisekisa ukusebenza kakuhle kunye nokusebenza kakuhle kweendleko.

FAQ

Zithini umahluko ophambili phakathi kweevalvu ze-aluminium kunye ne-brass fire hydrant?

Iivalvu ze-aluminiyam zilula, zingabizi kakhulu, kwaye azinamhlwa, nto leyo eyenza ukuba zilungele ukusetyenziswa ngokuguquguqukayo. Iivalvu zebrass, kwelinye icala, zinika amandla aphezulu, ukuqina, kunye nozinzo lobushushu, zigqwesa kwiindawo ezifuna kakhulu. Ndicebisa ukuba ukhethe ngokusekelwe kwiimfuno zakho zokusebenza kunye neemeko zokusingqongileyo.

Ndingasigqiba njani ukuba sesiphi isixhobo esingcono kwisicelo sam?

Cinga ngezinto ezifana nokuvezwa kokusingqongileyo, iimfuno zoxinzelelo, kunye nohlahlo-lwabiwo mali. I-Aluminium ifanele iimfuno ezilula, ezimelana nokugqwala, ngelixa ithusi lisebenza kakuhle kwiinkqubo ezinzima nezinoxinzelelo oluphezulu. Ndisoloko ndicebisa ukuba ulungelelanise ukhetho lwezinto kunye neenjongo zakho zokusebenza kunye nemigangatho yoshishino ukuze usebenze kakuhle.

Ngaba iivalvu ze-aluminium fire hydrant zihlala ixesha elide ngokwaneleyo ukuba zisetyenziswe ngaphandle?

Ewe, iivalvu ze-aluminiyam zisebenza kakuhle kakhulu ngaphandle. Umaleko wazo we-oxide yendalo ukhusela ukufuma, ungcoliseko, kunye nokugqwala. Ndizifumana zisebenza kakhulu kwiindawo ezifumileyo okanye ezinemvula, apho zifuna ulondolozo oluncinci kwaye zinokuthembeka ixesha elide.

Ngaba iivalvu zebrass zifuna ukulungiswa okungaphezulu kuneevalvu zealuminiyam?

Iivalvu zebrass zifuna ukuhlolwa rhoqo kunye neengubo zokukhusela, ingakumbi kwiindawo ezityebileyo kwi-chloride okanye ezifumileyo, ukuthintela ukubola. Iivalvu zealuminiyam, ezinokumelana nokugqwala kwendalo, azifuni ukugcinwa ixesha elide. Ndicebisa ukuba uvavanye iindleko zokulungisa xa ukhetha izixhobo zeevalvu zakho zokucima umlilo.

Ngaba zombini iivalvu ze-aluminium kunye nezethusi ziyahlangabezana nemigangatho yoshishino?

Ngokuqinisekileyo. Zombini ezi zinto zinokuhambelana neziqinisekiso ezifana ne-API, i-JIS, i-BS, i-UL, i-FM, kunye ne-ISO. Ndisoloko ndigxininisa ekuqinisekiseni iziqinisekiso ukuqinisekisa ukhuseleko, ukuthembeka, kunye nokuthotyelwa kweemfuno zomthetho. Iivalvu eziqinisekisiweyo ziqinisekisa ukusebenza kwaye zinciphisa iingozi zokusebenza.