1. General
Valves ntawm cov koob no yog siv los kaw lossis qhib cov kav dej hauv cov kav dej kom tswj tau qhov kev ua haujlwm ntawm lub cev.
2. Cov khoom piav qhia
2.1 Cov txheej txheem yuav tsum tau ua
2.1.1 Tsim thiab siv: API600, API603, ASME B16.34, BS1414
2.1.2 Kev sib txuas kawg qhov ntev: ASME B16.5, ASME B16.47, ASME B16.25
2.1.3 Lub ntsej muag rau lub ntsej muag lossis xaus rau qhov kawg: ASME B16.10
2.1.4 Kev soj ntsuam thiab kuaj: API 598, API600
2.1.5 Nominal qhov ntau thiab tsawg: MPS2 "~ 48", Nominal class ratings: Class150 ~ 2500
2.2 Valves ntawm no series yog phau ntawv (ua los ntawm handwheel los yog iav kem) rooj vag li qub nrog flange kawg thiab taub qab vuam kawg .Lub valve qia txav vertically.Thaum tig lub handwheel clockwise, lub rooj vag ntog mus kaw cov kav dej;Thaum tig lub tes log tig rov qab, lub rooj vag nce mus qhib cov kav dej.
2.3 Tus qauv saib daim duab 1, 2 thiab 3.
2.4 Cov npe thiab cov khoom ntawm cov khoom tseem ceeb tau teev nyob rau hauv Table 1.
| Lub Npe | Khoom siv |
| Lub cev thiab lub kaus mom | ASTM A 216 WCB,ASTM A352 LCB Cov Lus Qhia,ASTM A217 WC6, ASTM A217 WC9,ASTM A351 CF3,ASTM A351 CF3M Cov Lus Qhia Tshwj Xeeb ASTM A351 CF8,ASTM A351 CF8M Txheem:,ASTM A351 CN7M Cov Lus Qhia ASTM A494 CW-2M,Monel |
| rooj vag | ASTM A 216 WCB,ASTM A352 LCB Cov Lus Qhia,ASTM A217 WC6, ASTM A217 WC9,ASTM A351 CF3,ASTM A351 CF3M Cov Lus Qhia Tshwj Xeeb ASTM A351 CF8,ASTM A351 CF8M Txheem:,ASTM A351 CN7M Cov Lus Qhia ASTM A494 CW-2M,Monel |
| rooj | ASTM A105 1,ASTM A350 LF2,F11,F22, ASTM A182 F304 Cov Lus Qhia Tshwj Xeeb(304l ua),ASTM A182 F316(316l ua) ASTM B462,Has.C-4,Monel |
| qia | ASTM A182 F6a tau zoo,ASTM A182 F 304 Cov Lus Qhia(304l ua) ,ASTM A182 F316(316l ua),ASTM B462,Has.C-4,Monel |
| Ntim | Braided graphite thiab saj zawg zog graphite,PTFE |
| Stud / txiv ntseej | ASTM A 193 B7 / A194 2H,ASTM L320 L7 / A194 4, ASTM A193 B16 / A194 4,Raws li ASTM A193 B8 / A1948, ASTM A193 B8M / A194 8M |
| Gasket | 304(316)+ Daim duab,304(316),Has.C-4, Monel,b462 ua |
| Lub rooj zaum nplhaib / Disc / nto | 13 Cr,18Cr-8Ni,18Cr-8Ni-Mo,NiCu alloy,25Cr-20 Ni,STL |
3. Kev khaws cia, kev saib xyuas, kev teeb tsa thiab kev ua haujlwm
3.1 Cia thiab tu
3.1.1 Cov li qub yuav tsum muab cia rau hauv qhov chaw qhuav thiab qhov cua zoo.Cov kab kawg yuav tsum tau ntsaws nrog npog.
3.1.2 Lub valve nyob rau hauv lub sij hawm ntev cia yuav tsum tau soj ntsuam thiab ntxuav tsis tu ncua, tshwj xeeb tshaj yog ntxuav lub rooj zaum lub ntsej muag kom tsis txhob muaj kev puas tsuaj, thiab cov khoom tiav yuav tsum tau coated nrog xeb inhibiting roj.
3.1.3 Yog tias lub sijhawm khaws cia ntau tshaj 18 lub hlis, cov valve yuav tsum tau kuaj thiab cov ntaub ntawv yuav tsum tau ua.
3.1.4 Txhim kho li qub yuav tsum tau tshuaj xyuas thiab kho tsis tu ncua.Cov ntsiab lus tseem ceeb ntawm kev saib xyuas muaj xws li hauv qab no:
1) Lub ntsej muag sealing
2) Valve qia thiab valve qia txiv ntoo.
3) Ntim.
4) Fouling ntawm sab hauv ntawm lub cev valve thiab lub kaus mom valve
3.2 Kev teeb tsa
Ua ntej kev teeb tsa, xyuas kom tseeb tias qhov ntsuas valve (xws li qauv, DN, 3.2.1PN thiab cov khoom siv) raug cim raws li qhov yuav tsum tau ua ntawm cov kav dej.
3.2.2 Ua ntej kev teeb tsa, ua tib zoo xyuas lub valve thiab lub ntsej muag sealing.Yog tias muaj av, ntxuav kom huv si.
3.2.3 Ua ntej kev teeb tsa, xyuas kom tag nrho cov bolts tau nruj nruj.
3.2.4 Ua ntej kev teeb tsa, xyuas kom cov ntim ntim tau nruj nruj.Txawm li cas los xij, qhov kev txav ntawm lub qia valve yuav tsum tsis txhob cuam tshuam.
3.2.5 Qhov chaw teeb tsa ntawm lub valve yuav tsum pab tswj xyuas thiab ua haujlwm.Txoj hauj lwm zoo dua yuav tsum yog lub raj xa dej yog kab rov tav, tes log yog saum toj no, thiab lub valve qia yog ntsug.
3.2.6 Rau ib txwm kaw lub valve, nws tsis tsim nyog rau nruab nws nyob rau hauv qhov chaw uas ua hauj lwm siab loj heev kom tsis txhob puas lub valve qia.
3.2.7 Qhov (socket) welded li qub yuav tsum tsawg kawg ua tau raws li cov cai hauv qab no thaum lawv tau welded rau kev teeb tsa hauv cov kav dej ntawm qhov chaw:
1) Vuam yuav tsum tau ua los ntawm cov welder uas muaj welder daim ntawv pov thawj tsim nyog tau pom zoo los ntawm Lub Xeev Boiler thiab Pressure Vessel Authority;los yog tus welder uas tau txais welder daim ntawv pov thawj tsim nyog tau teev tseg hauv ASME Vol.Ⅸ.
2) Cov txheej txheem vuam yuav tsum raug xaiv raws li tau teev tseg hauv daim ntawv pov thawj zoo ntawm cov khoom siv vuam.
3) Cov tshuaj muaj pes tsawg leeg, txhua yam kev ua tau zoo thiab kev tiv thaiv corrosion ntawm cov khoom siv hlau ntawm vuam seam yuav tsum tau sib xws nrog cov hlau puag.
3.2.8 Lub valve feem ntau ntsia, kev ntxhov siab loj vim kev txhawb nqa, cov khoom siv thiab cov kav dej yuav tsum raug zam.
3.2.9 Tom qab kev teeb tsa, thaum lub sij hawm ntsuas siab ntawm cov kav dej, lub valve yuav tsum qhib tag nrho.
3.2.10 Bearing point: yog tias lub raj xa dej muaj lub zog txaus los dais lub qhov hnyav thiab lub zog ua haujlwm, ces tsis tas yuav tsum muaj qhov taw qhia bearing, txwv tsis pub lub valve yuav tsum muaj cov kabmob.
3.2.11 Lifting: tsis txhob siv lub log rau hoist thiab nqa valve.
3.3 Kev ua haujlwm thiab kev siv
3.3.1 Thaum lub sijhawm ua haujlwm, lub rooj vag valve yuav tsum qhib tag nrho lossis kaw kom tsis txhob muaj kev puas tsuaj ntawm lub rooj zaum lub nplhaib thiab lub rooj vag valve vim qhov nruab nrab ceev.Nws tsis tuaj yeem siv los kho qhov muaj peev xwm txaus.
3.3.2 Thaum qhib lossis kaw lub valve, siv lub log ntawm tes es tsis txhob siv lub pas nrig lossis siv lwm yam cuab yeej.
3.3.3 Thaum ua hauj lwm kub, xyuas kom meej tias instantaneous siab qis dua 1.1times uas ua hauj lwm siab ntawm siab-kub ntsuas nyob rau hauv ASME B16.34.
3.3.4 Cov cuab yeej tiv thaiv kev nyab xeeb yuav tsum tau muab tso rau ntawm lub raj xa dej kom tiv thaiv kev ua haujlwm siab ntawm lub valve ntawm kev ua haujlwm kub ntawm qhov siab tshaj qhov siab tshaj plaws.
3.3.5 Strokeing thiab shocking lub valve yog txwv tsis pub thaum lub sij hawm thauj, installation thiab ua hauj lwm lub sij hawm.
3.3.6 Decomposition ntawm unsteady kua, piv txwv li, cov decomposition ntawm ib co kua yuav ua rau lub ntim expansion thiab ua rau ua hauj lwm siab nce, yog li ua rau lub valve puas thiab permeation, yog li ntawd, siv cov ntsuas tsim nyog los tshem tawm los yog txwv yam uas yuav ua rau decomposition. ntawm kua.
3.3.7 Yog tias cov kua dej yog condensate, qhov no yuav cuam tshuam rau kev ua haujlwm ntawm lub valve, siv cov cuab yeej ntsuas tsim nyog los txo qhov kub ntawm cov kua dej (piv txwv li, kom lav qhov ntsuas kub ntawm cov kua) lossis hloov nrog lwm hom valve.
3.3.8 Rau nws tus kheej-inflammable kua, siv cov cuab yeej ntsuas tsim nyog los lav ambient thiab ua hauj lwm siab tsis tshaj nws pib-ignition point (tshwj xeeb tshaj yog ceeb toom tshav ntuj los yog sab nraud hluav taws).
3.3.9 Nyob rau hauv cov ntaub ntawv ntawm cov dej txaus ntshai, xws li tawg, tawg.Toxic, oxidation cov khoom, nws yog txwv tsis pub hloov packing nyob rau hauv siab (txawm hais tias lub valve muaj xws li ib tug muaj nuj nqi).
3.3.10 Ua kom cov kua dej tsis huv, uas cuam tshuam rau kev ua haujlwm ntawm lub valve, tsis muaj cov khib nyiab nyuaj, txwv tsis pub siv cov cuab yeej ntsuas tsim nyog yuav tsum tau siv los tshem tawm cov av thiab cov khib nyiab nyuaj, lossis hloov nrog lwm hom valve.
3.3.11 Tso cai ua haujlwm kub:
| Khoom siv | kub | Khoom siv | kub |
| ASTM A 216 WCB | -29～425 ℃ | ASTM A217 WC6 | -29～538 ℃ |
| ASTM A352 LCB Cov Lus Qhia | -46～343 ℃ | ASTM A217 WC9 | --29～570 ℃ |
| ASTM A351 CF3(CF 3M) | -196～454 ℃ | ASTM A494 CW-2M | -29～450 ℃ |
| ASTM A351 CF8(CF8M) | -196～454 ℃ | Monel | -29～425 ℃ |
| ASTM A351 CN7M Cov Lus Qhia | -29～450 ℃ |
| - |
3.3.12 Xyuas kom tseeb tias cov khoom ntawm lub cev valve yog tsim rau siv nyob rau hauv corrosion resistant thiab xeb tiv thaiv dej ib puag ncig.
3.3.13 Thaum lub sijhawm ua haujlwm, tshuaj xyuas kev sib khi ua haujlwm raws li cov lus hauv qab no:
| Qhov chaw soj ntsuam | Leak |
| Kev sib txuas ntawm lub cev valve thiab lub kaus mom | Zero |
| Packing foob | Zero |
| Valve rooj | Raws li kev specifications |
3.3.14 Tsis tu ncua xyuas qhov hnav ntawm lub ntsej muag sealing.Ntim kev laus thiab kev puas tsuaj.Ua kho lossis hloov lub sijhawm yog tias pom muaj pov thawj.
3.3.15 Tom qab kho, rov sib sau ua ke thiab kho lub valve, kev ntsuas nruj ua haujlwm thiab ua cov ntaub ntawv.
3.3.16 Kev kuaj xyuas thiab kho sab hauv yog ob xyoos.
4. Cov teeb meem tshwm sim, ua rau thiab kev ntsuas kho
| Teeb meem piav qhia | Ua tau | Kev ntsuas kho |
| Leak ntawm packing | Tsis txaus compressed packing | Re-tighten packing nut |
| Kev ntim khoom tsis txaus | Ntxiv cov khoom ntim ntxiv | |
| Kev ntim khoom puas vim yog kev pabcuam ntev lossis kev tiv thaiv tsis raug | Hloov ntim | |
| Leak ntawm lub rooj zaum lub ntsej muag | Lub ntsej muag qias neeg | Tshem tawm cov av |
| Hnav lub ntsej muag | Kho nws lossis hloov lub nplhaib lub rooj zaum lossis lub rooj vag valve | |
| Lub ntsej muag puas tsuaj vim yog cov khoom tawv tawv | Tshem tawm cov khoom tawv tawv hauv cov kua dej, kho lossis hloov lub nplhaib lub rooj zaum lossis lub rooj vag valve, lossis hloov nrog lwm hom valve | |
| Los ntawm kev sib txuas ntawm lub cev valve thiab lub valve bonnet | Bolts tsis zoo fastened | Uniformly fasten bolts |
| Kev puas tsuaj zaum saum npoo ntawm lub cev valve thiab valve bonnet flange | Kho nws | |
| Gasket puas los yog tawg | Hloov gasket | |
| Kev sib hloov nyuaj ntawm tes log lossis lub rooj vag valve tsis tuaj yeem qhib lossis kaw | Tightly fastened packing | Tsim nyog loosen packing txiv ntoo |
| Deformation los yog khoov ntawm lub caj pas sealing | Kho lub caj pas sealing | |
| Kev puas tsuaj valve qia txiv ntoo | Kho cov xov thiab tshem tawm cov av | |
| Hnav los yog tawg valve qia txiv ntoo xov | Hloov valve qia txiv ntoo | |
| Bent valve qia | Hloov valve qia | |
| Cov lus qhia qias neeg ntawm lub qhov rooj valve lossis lub cev valve | Tshem tawm cov av ntawm qhov chaw qhia |
Lus Cim: Tus neeg pabcuam yuav tsum muaj kev paub txog thiab kev paub txog li qub.
5. Warranty
Tom qab lub valve tau muab tso rau hauv kev siv, lub sijhawm lav ntawm lub valve yog 12 lub hlis, tab sis tsis pub tshaj 24 lub hlis tom qab hnub xa khoom.Thaum lub sijhawm lav, cov chaw tsim khoom yuav muab kev pabcuam kho lossis cov khoom seem dawb rau kev puas tsuaj vim cov khoom siv, kev ua haujlwm lossis kev puas tsuaj yog tias kev ua haujlwm raug raug.
Post lub sij hawm: May-19-2022