Ivalve yokutshekisha ikhusela umva onokuthi wenzekalise ukukhusela izixhobo ezinjengeempompo kunye neecompressors. Iivalvu ezingabuyiyo zivumela ukuhamba kolwelo kwicala elinye kuphela kwaye ibhloke i-reverse flow. Olu hlobo lweevalvu luyafumaneka kunye nemizimba ephosiweyo kunye neyenziweyo (BS 1868, API 6D, API 602) kunye noyilo oluninzi njengojingi, ibhola, ukuphakamisa, ukumisa kunye noyilo lwepiston.
Ngamafutshane, ivalve yokukhangela sisixhobo sokukhusela esithintela ulwelo ukuba lungahambi kwicala elingafunekiyo ngaphakathi kwenkqubo yemibhobho okanye umbhobho (njengoko ukubuya ngasemva kungonakalisa izixhobo eziphuma phezulu).
Isebenza njani ivalve yetshekhi?
Ivalve ivumela ulwelo ukuba luqukuqele kwicala elifunekayo kuphela (ukuba kukho uxinzelelo olwaneleyo), kwaye luvalela nakuphi na ukuhamba kwelinye icala. Kwakhona, i-valve ivala ngokuzenzekelayo xa uxinzelelo lwehla. Ngoko ke, kubalulekile ukuba ivalve ifakwe ngendlela efanelekileyo!
Qaphela ukuba olu hlobo lwevalve lufeza umda walo ngaphandle kwamandla angaphandle okanye ukusebenza. Lo ngumahluko ophambili ngokuchasene nesango okanye iivalvu zeglowubhu, ezifuna amandla angaphandle ukusebenza (inqanaba, ivili, igiya okanye i-actuator).
Iimpawu eziphambili ezigubungela olu hlobo lwesivalo zezi:
I-BS 1868: uhlobo oluqhelekileyo, kwikhabhoni kunye nentsimbi yealloy.
I-API 6D: yemibhobho.
I-API 602 / BS 5351: intsimbi ekhandiweyo (i-swing, ibhola, ipiston).
API 603: steel stainless uhlobo stop.
I-ASME B16.34 (uxinzelelo kunye neqondo lokushisa).
I-ASME B16.5/ASME B16.47 (i-flanged end connections).
I-ASME B16.25 (unxibelelwano lwe-butt weld).
Iivalvu zentsimbi ephosiweyo ziyafumaneka ngeephelo eziphothiweyo kunye neempundu.
I-Forged, isayizi encinci, iivalve ziyafumaneka kunye ne-threaded kunye ne-socket weld connections.
Ezi zivalo zimelwe ngolu phawu lulandelayo kwimibhobho yeP&ID imizobo: Uphawu lwevalvu yokutshekisha kumzobo weP&ID
Iivalvu zokujonga zifumaneka kwiindidi ezahlukeneyo eziphumeza umsebenzi ochazwe ngasentla ngediskhi ezahlukeneyo (ibhola, iclapet, ipiston, njl.njl) uyilo. Makhe sihlolisise ngakumbi uhlobo ngalunye.
SWING CHECK VALVE
Olu hlobo lunoyilo olulula kwaye lusebenza nge-metallic disc ("Clapet") eqhotyoshelwe kwihinge phezulu. Njengoko ulwelo ludlula kwivalve yokujingi, ivalve ivulekile. Xa i-reverse flow yenzeke, utshintsho kwi-motion kunye ne-gravity inceda ukukhupha i-disc, ukuvala i-valve kunye nokukhusela ukubuyisela umva.
Iivalve ze-Swing zisetyenziselwa ukulwa nomlilo kunye nokuthintela izikhukhula kwiinkqubo zogutyulo. Zikwayilelwe ukusebenza ngezinto ezifana negesi, ulwelo, kunye nezinye iintlobo zemidiya.
Ukuyeka ukujonga kunokuqala, kumise, kwaye kulawule ukuhamba kolwelo ngelixa kuthintelwa ukubuya umva okuyingozi okunokonakalisa ezinye izixhobo ezinjengeempompo kunye neecompressors.
Xa uxinzelelo kwinkqubo lungaphantsi kwexabiso elithile, le valve ivala ngokuzenzekelayo ukuze ivimbele ukuhamba okubuyela emuva. Ngokuqhelekileyo, olu hlobo lwevalve lunolawulo olugqithisiweyo lwangaphandle ukuvala i-passage ye-fluid ngesandla (ngokufanayo ne-valve yesango).
Izivalo zokumisa zixhaphake kakhulu kwizityalo zamandla, iinkqubo zebhoyila, kunye nokucocwa kwe-oyile & negesi, ukusetyenzwa kwe-hydrocarbon, kunye neenkonzo zokhuseleko loxinzelelo oluphezulu.
IBHOLA TSHEKI Ivalve
Ivalve yokujonga ibhola inebhola engqukuva ebekwe ngaphakathi emzimbeni evula kwaye ivale indlela yolwelo isiya kwicala elifunwayo kuphela.
Ibhola ijikeleza ngokukhululekileyo xa ulwelo ludlula kumbhobho lusiya kwicala elifunekayo. Ukuba umbhobho uxhomekeke ekucuthekeni koxinzelelo okanye ukubuya umva, ibhola engaphakathi kwevalve iya ngasesihlalweni, itywina ipaseji. Olu luyilo lufanele ulwelo lwe-viscous.
Zonke iivalve zokukhangela zezosapho luka "iivalve zokuphakamisa", kwaye ube noyilo lwesitulo olufana neevalvu zeglowubhu.
Ukwahluka koyilo lwebhola yinto ebizwa ngokuba yipiston. Olu hlobo lwevalve lusetyenziselwa iinkonzo zoxinzelelo oluphezulu apho i-fluid inokutshintsha isalathiso ngokukhawuleza kunye namandla amahle (oku ngenxa yokuba i-disc ikhokelwa ngokuchanekileyo kwaye ingena ngokugqibeleleyo kwisihlalo).
Iivalvu zebhola kunye nepiston zingafakwa zombini ngokuthe tye kwaye ngokuthe nkqo.
Ipleyiti EMBINI
Iivalve zokujonga iipleyiti ezimbini, ezigutyungelwe yinkcazo ye-API 594, zihlala zisetyenziselwa ukukhusela iimpompo, iicompressors kunye nezinye izixhobo zomatshini.
UXINZELELO Ltywina
Olu hlobo lubonisa ikhava yoyilo olukhethekileyo olukwaziyo ukumelana noxinzelelo oluphezulu.
Ivalve entsha yokukhangela iya kufakwa nanini na xa kufakwa impompo yesump entsha isebenza. Oku kungenxa yokuba iivalvu ezindala zokukhusela zinokuthi zonakaliswe yimisebenzi yangaphambili evulekileyo / evaliweyo okanye ngokubola kunye neengozi zokonakalisa impompo ye-sump entsha idlula ngokude iindleko zevalve entsha yokujonga!
Ivalve yempompo ye-sump ithintela ukuphuma ngasemva kwimpompo ye-sump xa isixhobo sicinyiwe ngumsebenzisi okanye yinkqubo yolawulo oluzenzekelayo. Ngaphandle kwevalve yokutshekisha, ulwelo lunokubuyela kwimpompo ye-sump kwaye iyinyanzele ukuba ihambise ulwelo olunye amaxesha amaninzi, iyitshise kwangethuba.
Ngoko ke, ukwandisa umjikelezo wobomi bempompo ye-sump, ivalve engabuyiyo kufuneka ihlale ifakwe.
Ixesha lokuposa: Oct-26-2019