1. Kakaretso
Li-valve tsa letoto lena li sebelisetsoa ho koala kapa ho bula lipeipi tsamaisong ea lipeipi e le ho boloka ts'ebetso e tloaelehileng ea sistimi.
2. Tlhaloso ea Sehlahisoa
2.1 Tlhokahalo ea theknoloji
2.1.1 Moralo le moetso: API600, API603, ASME B16.34, BS1414
2.1.2 Boemo ba pheletso ea khokahanyo: ASME B16.5, ASME B16.47, ASME B16.25
2.1.3 Sefahleho le sefahleho kapa pheletso ho isa qetellong:ASME B16.10
2.1.4 Tlhahlobo le teko: API 598, API600
2.1.5 Boholo ba mabitso: MPS2″～48″, Litekanyetso tsa sehlopha sa mabitso: Sehlopha sa150 ~ 2500
2.2 Li-valve tsa letoto lena li tsamaisoa ka letsoho (li kenngoa ka har'a handwheel kapa lebokose la gear) li-valve tsa heke tse nang le lipheletso tsa flange le qetellong ea li-welding tsa butt.Ha u reteletsa lebili la letsoho ho ea ka oache, heke e oela fatše ho koala phaephe;ha u thinyetsa lebili la letsoho ho ea ka pela oache, keiti ea phahama ho bula lipeipi.
2.3 Sebopeho se sheba setšoantšo sa 1, 2 le sa 3.
2.4 Mabitso le lisebelisoa tsa likarolo tse kholo li thathamisitsoe ho Lethathamo la 1.
| Karolo Lebitso | Lintho tse bonahalang |
| 'Mele le bonete | ASTM A216 WCB,ASTM A352 LCB,ASTM A217 WC6, ASTM A217 WC9,ASTM A351 CF3,ASTM A351 CF3M ASTM A351 CF8,ASTM A351 CF8M,ASTM A351 CN7M ASTM A494 CW-2M,Monel |
| Keiti | ASTM A216 WCB,ASTM A352 LCB,ASTM A217 WC6, ASTM A217 WC9,ASTM A351 CF3,ASTM A351 CF3M ASTM A351 CF8,ASTM A351 CF8M,ASTM A351 CN7M ASTM A494 CW-2M,Monel |
| setulo | ASTM A105,ASTM A350 LF2,F11,F22, ASTM A182 F304（304L）,ASTM A182 F316（316L） ASTM B462,Has.C-4,Monel |
| kutu | ASTM A182 F6a,ASTM A182 F304（304L） ,ASTM A182 F316（316L）,ASTM B462,Has.C-4,Monel |
| Ho paka | graphite e lohiloeng le graphite e feto-fetohang,PTFE |
| Sekoahelo/nate | ASTM A193 B7/A194 2H,ASTM L320 L7/A194 4, ASTM A193 B16/A194 4,ASTM A193 B8/A194 8, ASTM A193 B8M/A194 8M |
| Gasket | 304（316）+Kerafo,304（316）,Has.C-4, Monel,B462 |
| Setulo selikalikoe/Disc/surfaces | 13Kr,18Kr-8Ni,18Cr-8Ni-Mo,NiCu motsoako,25Cr-20Ni,STL |
3. Ho boloka, tlhokomelo, Ho kenya le ho sebetsa
3.1 Ho boloka le ho hlokomela
3.1.1 Li-valve li lokela ho bolokoa ka phaposing e ommeng le e nang le moea o motle.Maqephe a phasejeng a lokela ho hokeloa ka likoahelo.
3.1.2 Li-valve tlas'a polokelo ea nako e telele li lokela ho hlahlojoa le ho hloekisoa kamehla, haholo-holo ho hloekisoa ha sefahleho sa setulo ho thibela tšenyo, 'me libaka tse phethiloeng li lokela ho koaheloa ka oli e thibelang mafome.
3.1.3 Haeba nako ea polokelo e feta likhoeli tse 18, li-valve li lokela ho lekoa le ho etsa litlaleho.
3.1.4 Li-valve tse kentsoeng li lokela ho hlahlojoa le ho lokisoa khafetsa.Lintlha tse ka sehloohong tsa tlhokomelo li kenyelletsa tse latelang:
1) Ho tiisa sefahleho
2) Thipa ea valve le nate ea kutu ea valve.
3) Ho paka.
4) Ho senya holim'a bokaholimo ba 'mele oa valve le bonnet ea valve
3.2 Ho kenya
Pele o kenya, etsa bonnete ba hore lintlha tsa li-valve (joalo ka mohlala, DN, 3.2.1PN le thepa) li tšoailoe ho latela litlhoko tsa tsamaiso ea lipeipi.
3.2.2 Pele o kenya, hlahloba ka hloko phaseje ea valve le sefahleho se koalang.Haeba ho na le litšila, li hloekise hantle.
3.2.3 Pele o kenya, etsa bonnete ba hore liboutu tsohle li tlanngoe ka thata.
3.2.4 Pele o kenya, etsa bonnete ba hore ho paka ho hateletsoe ka thata.Leha ho le joalo, ho sisinyeha ha kutu ea valve ha hoa lokela ho sitisoa.
3.2.5 Sebaka sa ho kenya valve se lokela ho thusa ho hlahloba le ho sebetsa.Boemo bo loketseng e lokela ho ba hore phaephe e tšekaletse, lebili la letsoho le ka holimo, 'me kutu ea valve e otlolohile.
3.2.6 Bakeng sa valve e atisang ho koaloa, ha ea lokela ho e kenya sebakeng seo khatello ea ho sebetsa e leng khōlō haholo ho qoba tšenyo ea kutu ea valve.
3.2.7 Li-valve tse cheselitsoeng ka sokete bonyane li tla fihlela litlhoko tse latelang ha li cheselitsoe bakeng sa ho kenngoa tsamaisong ea lipeipi setšeng:
1) Welding e lokela ho etsoa ke motho ea chesehelang ea nang le setifikeiti sa thuto ea welder e amohetsoeng ke Bolaoli ba Bolaoli ba Naha le Sekepe sa Khatello;kapa motho ea chesehelang ea fumaneng setifikeiti sa mangolo a thuto se boletsoeng ho ASME Vol.Ⅸ.
2) Litekanyetso tsa ts'ebetso ea welding li tlameha ho khethoa joalo ka ha ho boletsoe bukeng ea netefatso ea boleng ba lisebelisoa tsa welding.
3) Sebopeho sa lik'hemik'hale, ts'ebetso ea mochini le ho hanyetsa kutu ea tšepe ea filler ea seam welding e lokela ho lumellana le tšepe ea motheo.
3.2.8 Hangata valve e kenngoa, khatello e kholo ka lebaka la litšehetso, lisebelisoa le liphaephe li lokela ho qojoa.
3.2.9 Ka mor'a ho kenya, nakong ea teko ea khatello ea tsamaiso ea liphaephe, valve e tlameha ho buloa ka botlalo.
3.2.10 Sebaka sa ho behela: haeba phaephe e na le matla a lekaneng ho jara boima ba valve le torque ea ts'ebetso, ha ho hlokahale sebaka sa ho beha, ho seng joalo valve e lokela ho ba le ntlha ea ho beleha.
3.2.11 Ho phahamisa: se sebelise mabili a letsoho ho phahamisa le ho phahamisa valve.
3.3 Ts'ebetso le ts'ebeliso
3.3.1 Nakong ea ts'ebeletso, heke ea valve e tlameha ho buloa kapa ho koaloa ka botlalo ho qoba tšenyo ea bokaholimo ba selikalikoe sa setulo le heke ea valve ka lebaka la lebelo le phahameng.E ke ke ea sebelisoa ho fetola matla a phallo.
3.3.2 Ha u bula kapa u koala valve, sebelisa lebili la letsoho ho e-na le lehare le thusang kapa sebelisa sesebelisoa se seng.
3.3.3 Ha mocheso o sebetsa, etsa bonnete ba hore khatello ea hang-hang e ba tlase ho makhetlo a 1.1 ho feta khatello e sebetsang ea litekanyetso tsa khatello ea mocheso ho ASME B16.34.
3.3.4 Thepa ea pholoso ea polokeho e lokela ho kengoa pompong ho thibela khatello e sebetsang ea valve mocheso o sebetsang ho feta khatello e phahameng e lumelletsoeng.
3.3.5 Ho otla le ho tšosa valve ho thibetsoe nakong ea lipalangoang, ho kenya le ho sebetsa.
3.3.6 Ho senyeha ha mokelikeli o sa tsitsang, mohlala, ho senyeha ha metsi a mang ho ka baka ho eketseha ha molumo 'me ho lebisa ho phahama ha khatello ea ho sebetsa, kahoo ho senya valve le ho baka ho phunyeletsa, ka hona, sebelisa lisebelisoa tse nepahetseng tsa ho lekanya ho felisa kapa ho fokotsa lintlha tse ka bakang ho senyeha. ea mokelikeli.
3.3.7 Haeba mokelikeli e le condensate, sena se tla ama ts'ebetso ea valve, sebelisa lisebelisoa tse nepahetseng tsa ho lekanya ho fokotsa mocheso oa mokelikeli (mohlala, ho netefatsa mocheso o loketseng oa mokelikeli) kapa ho o nkela sebaka ka mofuta o mong oa valve.
3.3.8 Bakeng sa mokelikeli o ka chesang, sebelisa lisebelisoa tse nepahetseng tsa ho metha ho netefatsa hore maemo a tikoloho le khatello ea ho sebetsa ha e fete sebaka sa eona sa ho ithunyetsa (haholo-holo hlokomela khanya ea letsatsi kapa mollo o ka ntle).
3.3.9 Ha ho na le mokelikeli o kotsi, o kang o phatlohang, o ka tukang.Lintho tse chefo, lihlahisoa tsa oxidation, li thibetsoe ho nka sebaka sa ho paka tlas'a khatello (le hoja valve e na le mosebetsi o joalo).
3.3.10 Etsa bonnete ba hore mokelikeli ha o litšila, o amang ts'ebetso ea valve, ha o na lintho tse thata, ho seng joalo lisebelisoa tse loketseng tsa ho lekanya li lokela ho sebelisoa ho tlosa litšila le lintho tse thata, kapa ho e nkela sebaka ka mofuta o mong oa valve.
3.3.11 Mocheso o lumelletsoeng oa ho sebetsa:
| Lintho tse bonahalang | mocheso | Lintho tse bonahalang | mocheso |
| ASTM A216 WCB | -29～425℃ | ASTM A217 WC6 | -29～538℃ |
| ASTM A352 LCB | -46～343 ℃ | ASTM A217 WC9 | --29～570 ℃ |
| ASTM A351 CF3（CF3M） | -196～454 ℃ | ASTM A494 CW-2M | -29～450 ℃ |
| ASTM A351 CF8（CF8M） | -196～454 ℃ | Monel | -29～425℃ |
| ASTM A351 CN7M | -29～450 ℃ |
| - |
3.3.12 Etsa bonnete ba hore thepa ea 'mele oa li-valve e loketse ho sebelisoa tikolohong ea mokelikeli o thibelang ho bola.
3.3.13 Nakong ea litšebeletso, hlahloba ts'ebetso ea ho tiisa ho latela tafole e ka tlase:
| Sebaka sa ho hlahloba | Dutla |
| Khokahano lipakeng tsa 'mele oa valve le bonnet | Zero |
| Ho paka tiiso | Zero |
| Setulo sa valve | Joalo ka litlhaloso tsa tekheniki |
3.3.14 Kamehla hlahloba hore na sefahleho se tiisitsoeng ke sefe.Ho paka botsofali le tšenyo.Etsa tokiso kapa o nke sebaka ka nako haeba bopaki bo fumanoa.
3.3.15 Ka mor'a ho lokisoa, kopanya hape 'me u lokise valve, ts'ebetso e thata ea teko le ho etsa tlaleho.
3.3.16 Tlhahlobo le tokiso ea ka hare ke lilemo tse peli.
4. Mathata a ka bang teng, lisosa le mehato ea ho lokisa
| Tlhaloso ea bothata | Seo e ka bang sesosa | Mehato ea ho lokisa |
| Dutla ha o paka | Ho paka ka mokhoa o sa lekaneng | Khutlisa hape ho paka nut |
| Bongata bo sa lekaneng ba ho paka | Eketsa ho paka tse ling | |
| Pakete e senyehileng ka lebaka la ts'ebeletso ea nako e telele kapa ts'ireletso e sa lokelang | Nka sebaka sa ho paka | |
| Dutla sefahlehong se dutseng sa valve | Sefahleho se ditshila se dutseng | Tlosa litšila |
| Sefahleho se apereng sa setulo | E lokise kapa u kenye lesale la setulo kapa keiti ea valve | |
| Sefahleho se senyehileng sa setulo ka lebaka la lintho tse thata | Tlosa lintho tse thata ka har'a mokelikeli, lokisa kapa u nke sebaka sa lesale la setulo kapa keiti ea valve, kapa u nke sebaka ka mofuta o mong oa valve | |
| Ho dutla ha ho hokahana pakeng tsa mmele wa valve le bonete ya valve | Liboutu ha lia tlamisoa hantle | Tlama liboutu ka mokhoa o tšoanang |
| Sebaka sa bolulo se senyehileng sa 'mele oa valve le flange ea bonnet ea valve | E lokise | |
| Gasket e senyehileng kapa e robehileng | Kenya sebaka sa gasket | |
| Ho potoloha ho thata ha lebili la letsoho kapa heke ea valve ha e khone ho buloa kapa ho koaloa | Ho paka ka thata haholo | Ka tsela e loketseng theola linate tsa ho paka |
| Phetoho kapa ho kobeha hoa tšoelesa e tiisang | Fetola tšoelesa ea ho koala | |
| Nate ea stem ea valve e senyehileng | Lokisa khoele 'me u tlose litšila | |
| Khoele e tsofetseng kapa e robehileng ea li-valve stem nut | Fetola nate ea stem ea valve | |
| Sekhahla sa valve se kobehileng | Fetola kutu ea valve | |
| Bokaholimo bo litšila ba heke ea valve kapa 'mele oa valve | Tlosa litšila sebakeng sa tataiso |
Tlhokomeliso: Motho ea sebetsang o lokela ho ba le tsebo e nepahetseng le boiphihlelo ka li-valve.
5. Tiisetso
Ka mor'a hore valve e sebelisoe, nako ea tiiso ea valve ke likhoeli tse 12, empa ha e fete likhoeli tse 24 ka mor'a letsatsi la ho pepa.Nakong ea tiisetso, moetsi o tla fana ka tšebeletso ea tokiso kapa likarolo tse ling ntle le tefo bakeng sa tšenyo e bakiloeng ke thepa, moetso kapa tšenyo ha feela ts'ebetso e nepahetse.
Nako ea poso: May-19-2022