Yintoni iValve ye-SDV: Umgcini woKhuseleko lweMizi-mveliso

Isikhokelo Esibalulekileyo kwiiValve zeSDV: Ukukhusela Iinkqubo Ezibalulekileyo Zemizi-mveliso

Kwihlabathi elinzima kakhulu leoyile negesi, iikhemikhali zepetroli, ukuveliswa kombane, kunye nezinye iimboni zeenkqubo, ukhuseleko aluyonto iphambili nje kuphela; lubaluleke kakhulu. Entliziyweni yokukhusela abasebenzi, izinto, kunye nokusingqongileyo kwiziganeko eziyingozi ezifana nemililo, ukuqhuma, okanye ukukhutshwa kwetyhefu kukho isixhobo esibalulekileyo:Ivalvu Yokuvala (SDV), idla ngokubizwa ngokuba yi-Ivalvu Yokuvala Ungxamiseko (ESDV)Kodwa yintoni kanye kanye ivalvu ye-SDV, kwaye kutheni ibaluleke kangaka?

An Ivalvu ye-SDV (Ivalvu yokuvala)yivalvu ezenzekelayo eyilwe ngokukodwa neqinisekisiweyo edityaniswe kwiInkqubo yeZixhobo zoKhuseleko (i-SIS)Injongo yayo ephambili kukwahlula ngokukhawuleza nangokuthembekileyo icandelo lemibhobho okanye izixhobo xa ifumana isignali evela kwi-SIS, ebangelwa kukufunyanwa kwemeko enobungozi (umz., uxinzelelo oluphezulu, ubushushu obuphezulu, ukuvuza kwegesi, umlilo, ukusilela kwezixhobo). Oku kwahlula ngokukhawuleza kuthintela ukwanda kwesiganeko ngokumisa ukuhamba kolwelo oluyingozi (ulwelo, iigesi, okanye ii-multiphase).

Intsingiselo yeValve ye-SDV: Ngaphaya kwesifinyezo

Ifomu epheleleyo yeValve ye-SDV

Ifomu epheleleyo yeSDyiIvalvu yokuvalaEli gama lichaza ngokucacileyo umsebenzi walo oyintloko: ukuvala ukuhamba kwamanzi phantsi kweemeko ezingxamisekileyo.I-ESDV (iValvu yoKuvala iXakeka)okanyeI-SSV (iValve yokuvala uKhuseleko)zidla ngokusetyenziswa ngokutshintshana, zigxininisa indlela ebaluleke ngayo "ingxamiseko" okanye "ukhuseleko" lokusebenza kwayo.

Intsingiselo Eyintloko kunye nenjongo

Intsingiselo yevalvu ye-SDV idlula izinto zayo zoomatshini. Imele oku kulandelayo:

* Umgca Wokugqibela Wokuzikhusela:Xa ulawulo lwenkqubo oluphambili lungaphumeleli, i-SDV iyasebenza.

* Ukunciphisa umngcipheko:Iyanciphisa ngokuthe ngqo imiphumo yesiganeko esiyingozi.

* Umyalelo Wokuthembeka:Ukungaphumeleli akuyondlela ifanelekileyo. Ii-SDV kufuneka zisebenze xa zifunwa, ngalo lonke ixesha.

* Isenzo Esizenzekelayo:Ukungenelela kwabantu kuhamba kancinci kakhulu; ii-SDV zisebenza kwimizuzwana okanye kwimizuzwana eyi-millisecond.

* Ukuhlanganiswa kweNkqubo:Ayisosixhobo esizimeleyo kodwa yinto ephambili kwi-SIS eqinisekisiweyo (IEC 61511 / ISA 84.01).

Isebenza njani iValve ye-SDV? Ikhonkco leNkqubo yeZixhobo zoKhuseleko (SIS)

I-SDV ayisebenzi yodwa. Yinto yokugqibela ngaphakathiUmsebenzi weZixhobo zoKhuseleko (SIF), inxalenye yolwazi olubanziI-SISNantsi indlela eqhelekileyo yokwenza izinto:

1. Ukufunyanwa kweengozi:Izinzwa (umz., izithumeli zoxinzelelo, izinzwa zobushushu, izifumani zegesi, izifumani zomlilo) zijonga iimeko zenkqubo.

2. Ukucwangciswa kweLogic:Umlawuli weNkqubo yeZixhobo zoKhuseleko (SIS) ozinikeleyo (njenge-Safety PLC) uhlala evavanya igalelo lesensor ngokuchasene nemida ekhuselekileyo echazwe kwangaphambili.

3. Uphawu lohambo:Ukuba imeko enobungozi iqinisekisiwe, isilawuli se-SIS sithumela isignali yokuhamba kwi-actuator yevalvu ye-SDV.

4. Isenzo seValve:I-SDV actuator ishukumisa ngokukhawuleza ivalvu ukuya kwindawo yayo echazwe kwangaphambili (ngesiqhelo iFail-Closed – FC, kodwa ngamanye amaxesha iFail-Open – FO okanye iFail-in-Place – FL). Oku kwahlula ukuhamba kolwelo oluyingozi.

5. Ukuzahlula kwiinkqubo:Indlela yokuhamba kwamanzi iyanqunyulwa, nto leyo ethintela ingozi ukuba ingakhuli okanye isasazeke.

Indlu yamandla: Ii-SDV Valve Actuators

I-actuator yiyo eguqula isignali yombane okanye ye-pneumatic ye-SIS ibe ngamandla oomatshini afunekayo ukuhambisa iplagi/ibhola/idiski yevalvu ngokukhawuleza nangokuthembekileyo. Ii-actuators ze-SDV zineemfuno ezizodwa:

* Isantya esiphezulu:Kufuneka uhambise ivalvu kwindawo yayo ekhuselekileyo ngaphakathi kwexesha elimiselweyo (idla ngokuba yimizuzwana emi-2-10 kwiivalvu ezinkulu).

* Ukuthembeka Okuphezulu kunye nokuFumaneka:Yenzelwe ukusebenza rhoqo kodwa kubaluleke kakhulu. Ukuphindaphindeka kwezinto kuqhelekile.

* Ukusebenza Okukhuselekileyo:Kufuneka uye kwindawo ekhuselekileyo *ngaphandle* kokufuna amandla angaphandle (umz., xa umoya ulahlekile, umbane, okanye isignali ilahlekile). Oku kubalulekile.

* I-Torque/Thrust Eyaneleyo:Kufuneka woyise amandla enkqubo (uxinzelelo, ukuhamba) kunye nokungqubana ukuze ivalvu ihlale kakuhle, nokuba imeko imbi kakhulu.

Iindidi ze-SDV Actuator eziqhelekileyo

1. Ii-Actuators ze-Pneumatic zokubuya kwentwasahlobo:Uhlobo oluqhelekileyo lwee-SDV.

* Umsebenzi:Umoya oxinzelelweyo ubamba ivalvu *kwisipringi esinamandla kwindawo yaso yokusebenza eqhelekileyo. Kwisignali yokuhamba (ukulahleka komoya okanye umyalelo we-SIS), umoya uphuma ngokukhawuleza, kwaye isipringi siqhubela ivalvu ngamandla kwindawo yayo ekhuselekileyo (idla ngokuvalwa).

* Iingenelo:Itekhnoloji eqinisekisiweyo, ekhuselekileyo ngokwendalo, ekhawulezayo, nenamandla amakhulu okukhupha imveliso.

* Iingxaki:Ifuna ukuhanjiswa komoya kwizixhobo kunye nomoya ococekileyo nowomileyo.

2. Ii-Actuators ze-Hydraulic ezibuyela entwasahlobo:

* Umsebenzi:Umgaqo ofanayo nowe-pneumatic, kodwa usebenzisa ulwelo lwe-hydraulic phantsi koxinzelelo ukubamba ivalvu ivuleke/ivalwe kwi-springs. Ukulahlekelwa koxinzelelo lwe-hydraulic okanye isignali yokuhamba kukhupha ulwelo, okuvumela ii-springs ukuba zishukumise ivalvu ziye kwindawo ekhuselekileyo.

* Iingenelo:Uxinano lwamandla aphezulu kune-pneumatic kwiivalvu ezinkulu kakhulu, zifanelekile kwiindawo ezikude ezingenamoya.

* Iingxaki:Inzima ngakumbi, kwaye inokwenzeka ukuba kubekho ukuvuza kolwelo lwe-hydraulic, ifuna iyunithi yamandla e-hydraulic.

3. Iinkqubo zokuQokelela iHydraulic:Isetyenziswa rhoqo kwiivalvu ezinkulu ezifuna amandla amakhulu.

* Umsebenzi:Ulwelo lwe-hydraulic olunoxinzelelo oluphezulu olugcinwe kwii-accumulators luyakhululwa ukuze lunike amandla i-actuator ngokukhawuleza xa kufuneka. Izipringi okanye umxhuzulane zinokunceda. Inkqubo igcinwa itshajiswa ziipompo.

* Iingenelo:Amandla aphezulu kakhulu kunye nesantya kwizicelo ezibalulekileyo ze-large-bore.

* Iingxaki:Iimfuno ezinzima kakhulu, iindleko, kunye nokugcinwa.

I-MOV vs. I-SDV Valve: Ukuqonda umahluko obalulekileyo

Ingongoma eqhelekileyo yokudideka kukubaIivalvu Ezisetyenziswa Yimoto (iiMOV)UkuqobisanaIi-SDVNangona zombini zinokuba ziivalvu ezizenzekelayo, iindima kunye neemfuno zazo zahlukile ngokupheleleyo:

* Into ebalulekileyo ekufuneka uyithathe:IiMOV zenzelwe *ulawulo*. IiSDV zenzelwe *ukhuseleko*. I-MOV ngokubanzi AYIFANELEKANGA njenge-SDV ngaphandle kokuba yenzelwe ngokukodwa, iqinisekiswe, kwaye idityaniswe njengenxalenye ye-SIS (engaqhelekanga ngenxa yesantya kunye nemida engaphakathi yokungaphumeleli kweemoto zombane). Ukusebenzisa i-MOV engaqinisekiswanga kwimisebenzi yokhuseleko ngumngcipheko omkhulu.

Iivalvu ze-SDV kunye ne-BDV: Amaqabane kuKhuseleko

Esinye ivalvu esihlala sikhankanywa ecaleni kwee-SDVs yiIvalvu yokuvuthuza (BDV)Nangona zombini zizivali zokhuseleko ngaphakathi kwi-SIS, zisebenza ngeenjongo ezahlukeneyo, ngamanye amaxesha ezihambelanayo:

* I-SDV (iValvu yokuvala):Igxile ekuhlukaniseni ukuhamba kwamanzi. “Yeka ukungena kwamanzi.” Umsebenzi wayo kukuvala icandelo elithile.

* I-BDV (iValve yokuVuthela):Igxile ekuthomalaliseni uxinzelelo kunye nokukhupha umoya. "Lahla ngokukhuselekileyo izinto ezikhoyo apho." Umsebenzi wayo kukukhupha ngokukhawuleza ulwelo oluxinzelelweyo (igesi okanye ulwelo) oluvela kwizixhobo okanye kwiipayipi *emva* okanye ngamanye amaxesha *ngexesha* lokuzikhupha uye kwindawo ekhuselekileyo (ukuvutha, i-vent stack, inkqubo evaliweyo).

Indlela Abasebenzisana Ngayo:

1. Kufunyenwe ingozi (umz., umlilo kwi-compressor yegesi).

2. Ii-SDV ziyavalwaphezulu nasezantsi, ukwahlula icandelo lecompressor.

3. IiBDV zivuliwe, ukukhupha igesi enoxinzelelo oluphezulu evalelekileyo ngaphakathi kwecandelo elihlukanisiweyo ukuya kwinkqubo yokutsha, kunciphisa uxinzelelo kunye nomthwalo womlilo.

4. Le ntshukumo idibeneyo iyayihlukanisa ingozi *kwaye* inciphisa umthombo wamandla oyondlayo.

Ubukhulu beValve ye-SDV: Imigangatho kunye nezinto zokukhetha

Iivalvu ze-SDV ziza ngobukhulu obahlukeneyo, zilawulwa yipayipi okanye i-nozzle yesixhobo ekufuneka zilingane. Ubukhulu buhambelana, bulawulwa kakhulu zezi:

* I-ASME B16.10:Ubukhulu boBuso noBuso beeValvu zeFerrous (Isango lezigqubuthelo, iglobhu, itshekhi, njl.njl.).

* I-ASME B16.5:Iiflanges zePipe kunye neFlanged Fittings (Ichaza ubungakanani beflange kunye novavanyo - Udidi lwe-150, 300, 600, 900, 1500, 2500).

* I-API 6D / I-API 6DSS:Iinkcukacha zeeValve zePipeline kunye neePiping (iBhola, itshekhi, iSango, iPlug) / iSubsea. Umgangatho ophambili weeSDV kwimibhobho yeoyile negesi, oquka uyilo, izixhobo, uvavanyo kunye nobukhulu.

* Iinkcukacha zoMvelisi:Nangona zilandela imigangatho, uyilo oluthile lweevalvu (ingakumbi ngee-actuators) luya kuba neekhathalogu ezinobukhulu obahlukileyo.

Izinto ezibalulekileyo ekufuneka ziqwalaselwe kwiiSDV:

* Ubungakanani beMibhobho Eqhelekileyo (i-NPS):Ubungakanani bombhobho ivalvu edibanisa kuwo (umz., 2″, 4″, 12″, 24″, 36″+).

* Udidi loXinzelelo (Uvavanyo lwe-ASME):Uxinzelelo oluphezulu oluyilwe yivalvu (umz., iKlasi 150, 300, 600, 900, 1500, 2500).

* Ubukhulu boBuso noBuso (F2F):Ubude obuphakathi kweflengi yokungena kunye neflengi yokuphuma bujonge. Kubalulekile kuyilo lwemibhobho kunye nesithuba.

* Ukubhola iFlange:Ipateni yomngxuma, ubungakanani, kunye nenombolo ngokwe-ASME B16.5 ye-NPS kunye neKlasi ethile.

* Ubukhulu be-Actuator:I-actuator (ingakumbi ii-spring assemblies kwiivalvu ezinkulu) inokunyusa kakhulu i-envelope iyonke (ubude, ububanzi, ubude). Indawo yokuhamba kwe-actuator kunye nokufikelela kulondolozo ibalulekile.

* Uqhagamshelo Lokugqibela:I-Flanged (RF, RTJ), i-Butt Weld (BW), i-Socket Weld (SW), i-Threaded. I-Flanged ixhaphake kakhulu kwii-SDV ukuze kube lula ukuyifaka nokugcina izinto zisemgangathweni.

* Ubunzima:Ii-SDV ezinkulu ezinee-actuator zinobunzima beetoni ezininzi. Inkxaso yesakhiwo kunye neemfuno zokuphatha zibalulekile.

Ngaphakathi kwiSentinel yoKhuseleko: Iinxalenye zeValve zeSDV eziphambili

Ukuqonda izinto eziphambili kunceda ukuqonda uyilo lwe-SDV kunye nokugcinwa kwayo:

1. Umzimba weValve:Indlu ephambili equlethe uxinzelelo, equlethe izinto zangaphakathi. Izinto (intsimbi yekhabhoni, intsimbi engatyiwayo, i-alloy) zikhethwa ngenxa yoxinzelelo, ubushushu, kunye nokuhambelana kolwelo. Iziphelo ezijijekileyo okanye ezidityanisiweyo.

2. Ibhonethi:Isixhobo sokugquma sibotshelelwe emzimbeni, sivumela ukufikelela kwizinto zangaphakathi kunye nokutywina umzimba. Idla ngokubandakanya ukupakisha/ukutywina isiqu.

3. Sika:Izinto zangaphakathi ezivezwa lulwelo lwenkqubo olulawula ukuhamba kwamanzi:

* Isihlalo:Umphezulu wokutywina ubandakanya amalungu oqhagamshelwano.

* Ilungu Lokuvala:Inxalenye ehambayo ukuze ithintele ukuhamba kwamanzi (iBhola, iSango, iDiski, iPlug).

* Isiqu:Umngxuma odibanisa i-actuator nelungu lokuvala, udlulisela amandla kunye nentshukumo. Indawo yokutywina ebalulekileyo.

4. Umchwethezi:Njengoko bekutshiwo ngaphambili (inkqubo yokubuyisela intwasahlobo okanye i-accumulator ye-Pneumatic/Hydraulic). Ifakwa ngqo kwibhonethi/ijoko yevalvu.

5. Isikhundla (Ukhetho – lovavanyo lwestroke olungaphelelanga):Nangona ii-SDV zihlala zivuliwe/zivalwe ngokupheleleyo, ezinye iinkqubo zisebenzisa ii-positioners zovavanyo lwe-partial stroke (PST) ukuqinisekisa intshukumo ngaphandle kohambo olupheleleyo.

6. Iivalvu zeSolenoid (ezibalulekileyo):Iivalvu ezilawulwa ngombane kumgca wokuhambisa umoya/i-hydraulic ukuya kwi-actuator. Isignali yokuhamba ye-SIS idla ngokususa amandla ezi solenoids, ibangele ukuphuma komoya/i-hydraulic fluid ngokukhawuleza kwaye ivumele ukubuyela kwentwasahlobo.

7. Iiswitshi zomda:Nika impendulo yombane kwinkqubo ye-SIS/yolawulo ukuqinisekisa indawo yevalvu (Ivuliwe/Ivaliwe/Ikhutshiwe).

8. Isalathisi sendawo yengingqi:Igeyiji ebonakalayo (edla ngokuba kwi-actuator) ebonisa indawo yevalvu.

9. Idyokhwe:Ulwakhiwo oludibanisa i-actuator nomzimba wevalvu kunye nokuxhasa isiqu.

10.Ukupakisha/Iitywina:Kubalulekile ukuthintela ukuvuza kolwelo oluhamba kwisiqu nakwindawo ezidityanisiweyo zomzimba/ibhonethi. Izinto kufuneka zijongane neemeko zenkqubo.

Ukuthetha Ulwimi: Uphawu lweValve ye-SDV

Kwimizobo yobunjineli, ingakumbiImizobo yeMibhobho kunye neZixhobo zoKusebenzisa izixhobo (ii-P&ID), iimpawu zikhawuleza zidlulise uhlobo lwevalvu kunye nomsebenzi. Uphawu lwe-SDV ludibanisa izinto:

1. Uphawu lweValve yeSiseko:Imele uhlobo lwevalvu:

* Ivalvu yeBhola:Oonxantathu ababini abajonge ngaphakathi, abadityaniswe ngomgca.

* Ivalvu yeSango:Imilo ye-wedge phakathi kwemigca emibini ethe nkqo.

* Ivalvu yePlagi:Imo yedayimani phakathi kwemigca emibini ethe nkqo.

2. Uphawu lwe-Actuator:Kwi-SDV, oku kubalulekile:

* Aisikwere(emele i-actuator ye-pneumatic/hydraulic) izotywe yancamathiselwa kuphawu lwevalvu.

* Ngaphakathi okanye ecaleni kwesikwere,unxantathu omncinciukukhomba *ngakwi* ivalvu kubonisaukubuya kwentwasahlobo.

* Indlela unxantathu okhomba ngayo (ukuya kuphawu lwevalvu) ibonisaisenzo esikhuselekileyo:

* Unxantathu ojonge kwivalvu =Ukusilela Kuvaliwe (FC)

* Unxantathu ojonge kude nevalvu =Ukusilela Ukuvula (FO)(Ayixhaphakanga kangako kwi-SDVs)

3. Ukubekwa kwe-SIS:Idla ngokubizwa ngokuba “SDV”, “ESDV”, “SSV”, okanye iphawulwe ngenombolo ethile ye-SIF (umz., XV-101).

4. Uphawu lweSolenoid:Ngamanye amaxesha isangqa esincinci esinonobumba "S" (we-solenoid) songezwa kufutshane nophawu lwe-actuator.

Umzekelo weSimboli (Ivalvu yeBhola yeSDV eValiweyo ngokuFail):

|——| <– Isixhobo sokuSebenzisa (Isikwere)
| > | <– Unxantathu wokubuya kweNtwasahlobo (ukhomba ngaphakathi = Ukungaphumeleli kuvaliwe)
|——|

|

/—–\

—-| O |—- <– Uphawu lweValve yeBhola (Izangqa/oonxantathu)
\—–/

(Qaphela: Iimpawu ze-P&ID zokwenyani zahluka kancinci ngokwemigangatho yenkampani, kodwa i-spring-return actuator yeyona nto ibalulekileyo kwi-SDV/ESDV).

Ukukhetha Isixhobo Esifanelekileyo: Iindidi zeValve ze-SDV

Uhlobo lwevalvu olufanelekileyo lokusetyenziswa kwe-SDV luxhomekeke kwizinto ezininzi: ukuqina kokutywina okufunekayo, isantya, ukwehla koxinzelelo, iimpawu zolwelo, ubungakanani, kunye nexabiso. Ezona ntlobo zixhaphakileyo zezi:

1. Ii-SDV zeValve yeBhola:

* Umsebenzi:Ukujika kwekota (ukujikeleza kwe-90-degree). Ibhola enembobo iyajikeleza ukuze ivuleke/ivale.

* Iingenelo: Ngesatya esikhuluukusebenza (kulungele isantya se-SDV), ukuvala okuqinileyo okufana namaqamza (kubalulekile ekubekweni ecaleni), imfuneko ye-torque ephantsi (ilungele ubungakanani be-actuator), ukwehla okuncinci koxinzelelo xa ivuliwe, i-full bore iyafumaneka, ukutywinwa kwe-bi-directional. Uhlobo lwe-SDV oluqhelekileyo.

* Iingxaki:Ayilungelanga ukubetheka kakhulu (umonakalo we-cavitation), inokuba yingozi kwisihlalo xa kukho izinto ezimdaka okanye eziqinileyo.

* Eyona ilungileyo:Uninzi lwezicelo zegesi, ulwelo, kunye neenkonzo ezicocekileyo ezifuna ukuvalwa ngokukhawuleza nangokuqinileyo. Uluhlu olubanzi lobukhulu/uxinzelelo.

2. Ii-SDV zeValve yeSango:

* Umsebenzi:Intshukumo ethe tyaba ejika ngeendlela ezininzi. Idiski ethe tyaba okanye ethe tyaba ityibilika ngokuthe nkqo kwindlela yokuhamba ukuze ivuleke/ivalwe.

* Iingenelo:Ukuhamba ngokuthe ngqo, ukwehla koxinzelelo oluphantsi kakhulu xa luvuliwe ngokupheleleyo, kulungile kwi-slurry/ulwelo olungcolileyo kancinci (umngcipheko omncinci wokonakala kwesihlalo kuneevalvu zebhola), ukutywinwa okuhamba kwicala ngalinye kunokwenzeka.

* Iingxaki:Ukusebenza kancinci kuneevalvu zebhola (ezijika-phinda-phindayo xa zijika-phindayo), okunokwenzeka kokukhukuliseka kwesihlalo/isango xa kuhamba ngesantya esiphezulu xa kuvuliwe kancinci, okunokuvuza kancinci ngokuhamba kwexesha xa kuthelekiswa neevalvu zebhola, kufuna ukutyhalwa ngakumbi kwe-actuator.

* Eyona ilungileyo:Imigca emikhulu apho ukwehla koxinzelelo kubaluleke kakhulu, iinkonzo zokudaka, usetyenziso apho isantya singabalulekanga kangako kunakwezinye iindawo zenkqubo. Ayixhaphakanga kangako kwii-SDV zanamhlanje njengeevalvu zebhola.

3. Ii-SDV zePlug Valve:

* Umsebenzi:Ukujika kwekota (ukujikeleza kwe-90-degree). Iplagi enciphileyo okanye esisilinda ene-port ijikeleza ngaphakathi emzimbeni.

* Iingenelo:Uyilo olulula, lukhawuleza ngokwaneleyo, lunamandla okuvala amaqamza kakuhle, lunokusingatha ukutyibilika kakuhle, lufumaneka ngokupheleleyo.

* Iingxaki:I-torque ephezulu yokusebenza kuneevalvu zebhola (ingakumbi kwiisayizi ezinkulu/inkonzo enzima), amathuba okutsalwa (uqhagamshelwano lwentsimbi nesinyithi), iimfuno zokuthambisa (kwiintlobo ezithanjiswe nge-lubricant).

* Eyona ilungileyo:Iimfuno zesantya esiphakathi, iinkonzo ze-slurry, imigca emincinci, usetyenziso oluthile apho uyilo lweplagi luluncedo. Aluxhaphakanga kangako kuneevalvu zebhola.

Isishwankathelo seZinto eziqwalaselwayo xa ukhetha

* Isantya: Ibhola > Iplagi > Isango

* Ukunyaniseka kweValo: Ibhola ≈ Iplagi > Isango

* Ukwehla koxinzelelo (Vuliwe): Isango ≈ Ibhola (Izibuko Elipheleleyo) ≈ Iplagi (Izibuko Elipheleleyo) << Ibhola/Iplagi (Izibuko Elincitshisiweyo)

* Ukuphathwa kweSlurry/Okuqinileyo: Isango > Iplagi > Ibhola

* Amandla/I-Torque ye-Actuator: Isango (Uxinzelelo Oluphezulu) > Iplagi > Ibhola (Ngokubanzi yiTorque esezantsi)

* Ixabiso (Ngokubanzi): Ibhola ≈ Isango > Iplagi (Ubungakanani bayo/ixhomekeke kakhulu kwizinto ezisetyenzisiweyo)

Isiphelo: Indima Engenakuxoxiswana Ngayo yeValve ye-SDV

I-Shutdown Valve (SDV okanye i-ESDV) ingaphezulu kakhulu kune-valve enye ekwi-pipeline. Yinto yokhuseleko eyenziwe ngobuchule, evavanyiweyo, kwaye iqinisekiswe ngokunzulu, esebenza njengokhuseleko oluphezulu kwiNkqubo yeZixhobo zoKhuseleko. Amandla ayo okwahlula ngokukhawuleza nangokuthembekileyo ukuhamba kolwelo oluyingozi xa kuyimfuneko kubalulekile ekuthinteleni iziganeko eziyingozi kumashishini anomngcipheko ophezulu.

Ukuqonda intsingiselo yayo (iValve yokuvala), ukusebenza kwayo okukhuselekileyo okuqhutywa zii-actuators ezikhethekileyo (i-pneumatic/hydraulic ephumayo entwasahlobo), umahluko wayo ocacileyo kwiivalvu zolawulo ezifana nee-MOV, ubudlelwane bayo nee-BDV, ubukhulu bayo obuqhelekileyo kunye namacandelo, uphawu lwayo olukhethekileyo lwe-P&ID, kunye neentlobo ezahlukeneyo zeevalvu (ngokuyintloko ibhola, isango, iplagi) ezisetyenziswa ekwakhiweni kwayo kubalulekile kwiinjineli, abaqhubi, kunye neengcali zokhuseleko.

Ukukhetha, ukufaka, ukuvavanya, kunye nokugcina ii-SDV ngokwemigangatho engqongqo yamazwe ngamazwe (njenge-IEC 61511, i-API 6D, i-API 6A) ayisiyonto ilungileyo nje kuphela; yimfuneko ephambili yokusebenza kakuhle kunye nokukhuselwa kwabantu, izityalo kunye neplanethi. Ivalvu ye-SDV imi njengomlindi othuleyo nophaphileyo, olungele ukwenza into xa ukhuseleko lufuna kakhulu.