Lub Valve Npauj Npaim Ua Haujlwm Zoo Tshaj Plaws yog dab tsi?
A Kev Ua Haujlwm Siab Npauj Npaim Valve(HPBV) yog lub cuab yeej tswj kev ntws ib feem plaub ntawm lub voj voog uas muaj lub disc offset thiab qia tsim—feem ntau yog ob chav offset (ob chav eccentric) lossis peb chav offset (triple eccentric)—ua rau muaj kev sib khi zoo dua, lub zog ua haujlwm qis dua, thiab lub neej ua haujlwm ntev dua piv rau cov li qub concentric npauj npaim txheem.
Tsis zoo li ib tugConcentric Npauj Npaim Valve, qhov twg lub qia nyob nruab nrab ntawm lub cev valve thiab lub disc tseem nyob hauv kev sib cuag tas mus li nrog lub rooj zaum thaum lub sijhawm tig, kev tsim qauv ua haujlwm siab suav nrog ib lossis ntau qhov geometric offsets uas tso cai rau lub disc cam rau hauv thiab tawm ntawm lub rooj zaum, tiv tauj nws tsuas yog ntawm qhov chaw kaw tag nrho. Qhov kev sib txawv tseem ceeb no txo kev sib txhuam thiab kev hnav, ua rau cov npauj npaim valve ua haujlwm siab los tswj cov kev ntxhov siab siab dua (txog li Chav Kawm 600 lossis dhau ntawd), qhov kub siab dua (txog li 650 ° C nrog cov rooj zaum hlau), thiab ntau dua corrosive lossis abrasive xov xwm dua li lawv cov qauv counterparts.
Thoob ntiaj teb, kev ua lag luam rau cov npauj npaim valve ua haujlwm tau zoo tab tom loj hlob sai, nrog rau kev kwv yees qhia tias yuav nce ntxiv los ntawm USD 7.23 billion hauv xyoo 2024 mus rau USD 12.94 billion los ntawm xyoo 2031, ntawm CAGR ntawm 8.70%. Kev loj hlob no yog tsav los ntawm kev thov nce ntxiv thoob plaws roj & roj, kev ua tshuaj lom neeg, thiab kev tsim hluav taws xob.
API 609 Kev Faib Tawm: Cov Li Qub Ua Haujlwm Siab Npauj Npaim Haum Qhov Twg?
Yuav kom nkag siab txog qhov twg cov npauj npaim ua haujlwm siab sawv ntsug, cov engineers thiab cov kws tshaj lij kev yuav khoom yuav tsum paub txog tus qauv tswj hwm - API 609 (Butterfly Valves: Double-flanged, Lug- thiab Wafer-type). Tus qauv no txhais ob pawg meej:
| Pawg | Kev Teeb Tsa Disc | Hom Rooj Zaum | Kev Ntsuas Siab | Cov Ntawv Thov Ib Txwm Muaj |
|---|---|---|---|---|
| Pawg A | Concentric (xoom offset) | Lub rooj zaum mos mos (EPDM, NBR, Viton) | Kev ua haujlwm txias (CWP) - feem ntau txog li Chav Kawm 150 | Kev pabcuam dej, cua, thiab kev siv hluav taws xob tsawg |
| Pawg B | Eccentric (ob npaug lossis peb npaug offset) | PTFE/RPTFE, laminated, los yog hlau-rau-hlau | ASME Chav Kawm 150/300/600 thiab ntsuas qhov kub thiab txias | Cov kua dej ua haujlwm, cov pa dej, cov hydrocarbons, kev pabcuam kub siab |
Qeb B sib raug ncaj qha rau cov npauj npaim ua haujlwm siab. API 609 hais tias Qeb B cov li qub muaj "lub rooj zaum offset thiab ib qho eccentric lossis concentric disc configuration" thiab yog ASME Class thiab siab-kub ntsuas.
Qhov sib txawv tseem ceeb yog tias Qeb A li qub tsuas yog cov chaw tsim khoom ntsuas ntawm qhov siab ua haujlwm txias xwb, thaum Qeb B li qub raug ntsuas tag nrho rau qhov siab thiab kub raws li ASME B16.34. Rau cov engineers uas teev lub li qub rau txhua qhov kev pabcuam txheej txheem dhau ntawm dej lossis cua ib puag ncig, Qeb B (kev ua haujlwm siab) yog qhov kev xaiv tsim nyog.
Kev Tsim Kho Lub Npauj Npaim Valve Ua Haujlwm Zoo: Nkag Siab Txog Lub Ntsiab Cai Offset
Ob Lub Ntsiab Lus Tsim Qauv Ua Haujlwm Zoo
Ob Chav Offset (Ob Chav Eccentric) - Lub Hauv Paus
Tus qauv tsim ob chav offset—qee zaum tsuas yog hu ua "lub valve npauj npaim ua haujlwm siab"—suav nrog ob qhov offsets sib txawv:
- Qhov Sib Tshuam 1: Lub axis ntawm lub qag yog nyob tom qab lub dav hlau kaw disc, deb ntawm kab nruab nrab ntawm lub rooj zaum.
- Offset 2: Lub axis ntawm tus ncej yog offset los ntawm txoj kab nruab nrab ntawm lub yeeb nkab.
Ob qhov kev sib txawv no tsim kom muaj kev ua haujlwm cam thaum lub sijhawm tig. Thaum lub valve pib qhib, lub disc yuav tsa tawm ntawm lub rooj zaum yuav luag tam sim ntawd - feem ntau yog nyob rau hauv thawj 7-10 degrees ntawm kev mus ncig. Thoob plaws hauv qhov seem ntawm 90-degree stroke, lub disc tig yam tsis tau kov lub rooj zaum, tshem tawm kev sib txhuam thiab kev hnav. Qhov kev tsim no ua tiav kev kaw ob txoj kev sib txawv ntawm lub npuas dej thoob plaws tag nrho cov siab.
Cov li qub ob chav offset tuaj yeem nruab nrog PTFE lossis cov rooj zaum PTFE (RPTFE) uas muaj zog rau kev pabcuam dav dav txog li 260 ° C, nrog rau cov rooj zaum laminated hlau/graphite rau qhov kub siab dua.
Triple Offset (Triple Eccentric) - Rau Kev Pabcuam Loj
Lub triple offset valve ntxiv qhov geometric offset thib peb:
Qhov Sib Tshuam 3: Lub axis ntawm lub rooj zaum conical yog sib txawv ntawm txoj kab nruab nrab ntawm lub ncej, tsim kom muaj qhov chaw sib khi hlau-rau-hlau nrog cov duab conical.
Hauv lub valve peb txheej, cov nplaim sealing tsis sib txhuam lossis swb rau ib leeg thaum twg los tau thaum tig. Lub disc tsuas yog koom nrog lub rooj zaum ntawm qhov chaw kaw tag nrho los ntawm kev ua haujlwm zoo li wedge. Qhov no tshem tawm kev hnav khoom siv tag nrho.
Peb lub qhov dej sib txuas ua ke muab cov npuas dej kaw (xoom tsis xau) nrog cov rooj zaum hlau, ua kom:
- Kub ntawm -240 ° C txog 650 ° C
- Cov chav kawm siab txog li Chav Kawm 600 (lossis siab dua thaum thov)
- Kev ua tau zoo tiv thaiv hluav taws yam tsis muaj cov ntaub ntawv rooj zaum mos
- Kev sib khi ob txoj kev uas zoo dua thaum lub zog ntawm kab nce ntxiv
Cov yam ntxwv no ua rau cov qhov dej peb npaug tsim nyog rau cov ntawv thov tseem ceeb uas cov qhov dej mos mos tsis tuaj yeem siv tau - suav nrog cov pa kub siab, kev rho tawm hydrocarbon, thiab kev pabcuam oxygen.
Cov Cheebtsam Tseem Ceeb ntawm Lub Valve Npauj Npaim Ua Haujlwm Zoo
Kev nkag siab txog cov qauv ntawm cov khoom siv pab cov engineers soj ntsuam qhov sib txawv ntawm cov khoom tsim khoom:
| Cheebtsam | Cov Khoom Siv Ib Txwm Muaj | Kev Ua Haujlwm Tseem Ceeb |
|---|---|---|
| Lub cev | WCB carbon hlau, A351 CF8/CF8M stainless hlau, hlau ductile, duplex, nickel txhuas tooj dag | Kev txwv siab; muab kev ruaj khov ntawm cov qauv. Muaj cov qauv wafer thiab lug |
| Lub disc | A351 CF8M (316 SS), duplex, 17-4PH, Inconel overlay, Monel | Lub ntsiab lus tig uas tswj kev ntws; ntug disc txhuam tes txo qhov torque thiab txhim kho kev sib khi |
| Qia (Ncej) | 17-4PH stainless hlau, SS316, Inconel, Monel | Xa cov torque los ntawm actuator mus rau disc; ib daim tsim nyiam kom tshem tawm cov kev xau |
| Lub rooj zaum | PTFE, RPTFE, UHMWPE, laminated hlau/graphite, Stellite hardfacing | Lub ntsiab lus kaw thawj zaug. Cov li qub ua haujlwm siab siv cov rooj zaum uas muaj zog lossis cov rooj zaum hlau, tsis yog elastomers |
| Cov ntsaws ruaj ruaj | PTFE packing, flexible graphite rings, carbon fiber anti-extrusion rings | Kev tswj hwm pa phem; tswj lub foob nyob ib puag ncig lub qag tig |
| Cov kabmob | 316 SS plhaub nrog PTFE / iav ntaub liner | Txhawb nqa lub qia; txo qhov kev sib txhuam; ua kom lub voj voog valve ntev tshaj plaws |
| Lub Rooj Zaum Tuav | Cov hlau carbon los yog cov hlau tsis xeb | Ruaj ntseg lub rooj zaum sib dhos hauv lub cev; ua rau muaj kev hloov pauv hauv thaj chaw |
Ib lub valve npauj npaim uas tsim tau zoo thiab ua haujlwm tau zoo kuj muaj cov ntaub ntawv ISO 5211 uas txuas rau lub actuator ncaj qha yam tsis muaj cov brackets, thiab cov bearings sab saud thiab sab qis los txhawb lub qia thiab txuas lub neej ua haujlwm ntev.
Yuav Ua Li Cas Lub Valve Ua Haujlwm Zoo
Lub hauv paus ntsiab lus ua haujlwm tuaj yeem muab faib ua tsib kauj ruam:
- Qhov chaw kaw: Lub disc tig perpendicular rau txoj kev ntws, nias rau ntawm lub rooj zaum kom ua tiav kev kaw-ntiv tes npuas.
- Qhov qhib thawj zaug (0° txog ~10°): Qhov geometry offset ua rau lub disc nqa tawm ntawm lub rooj zaum yuav luag tam sim ntawd, rhuav tshem kev sib cuag thiab tshem tawm kev sib txhuam swb.
- Nruab Nrab-stroke (~ 10° txog 80°): Lub disc tig hauv txoj kev ntws yam tsis muaj kev sib cuag ntawm lub rooj zaum, ua rau lub zog ua haujlwm qis heev thiab hnav tsawg kawg nkaus.
- Txoj kev kawg (~80° txog 90°): Cov disc cams rov qab mus rau hauv lub rooj zaum tsuas yog thaum kaw tag nrho.
- Kev Kaw: Lub zog kaw feem ntau yog siv los ntawm lub zog ntawm kab, tsis yog los ntawm lub zog ntawm lub actuator; lub zog siab dua yeej ua rau lub rooj zaum nruj dua.
Qhov kev ua camming no yog qhov sib txawv tseem ceeb tshaj plaws ntawm lub valve ua haujlwm siab thiab tus qauv tsim concentric. Hauv lub valve concentric, lub disc nyob rau hauv kev sib cuag tas li nrog lub rooj zaum thoob plaws hauv tag nrho 90-degree tig, ua rau hnav sai dua, xav tau torque siab dua, thiab lub neej ua haujlwm luv dua.
Lub Rooj Vag Npauj Npaim Ua Haujlwm Zoo vs. Lub Rooj Vag Npauj Npaim Concentric: Kev Sib Piv Ib Sab
Rau cov kws tshaj lij engineering thiab kev yuav khoom uas ntsuam xyuas cov kev xaiv valve, qhov kev sib piv ntawm concentric (Qeb A) thiab high-performance (Qeb B) butterfly valves yog qhov tseem ceeb:
| Feature | Concentric Npauj Npaim Valve | Kev Ua Haujlwm Siab Npauj Npaim Valve |
|---|---|---|
| Kev ntsuas ntawm lub disc | Kev sib txawv ntawm xoom (chaw nruab nrab) | Ob chav offset los yog peb zaug offset |
| Hom Rooj Zaum | Cov roj hmab mos mos (EPDM, NBR, Viton) | PTFE, RPTFE, laminated, lossis hlau-rau-hlau |
| Kev Ntsuas Siab | Txog li 250 PSI (txwv rau Chav Kawm 150) | Txog li 1,480 PSI (Chav Kawm 600+; peb npaug offset txog li Chav Kawm 900) |
| Kub thiab txias | -20°C txog 180°C | Cov rooj zaum PTFE: -29°C txog 260°C; cov rooj zaum hlau: -240°C txog 650°C |
| Kev Siv Lub Cev | Lub disc rubs tawm tsam lub rooj zaum thoob plaws kev tig tag nrho | Cov disc contacts tsuas yog zaum thaum kaw (cam action) |
| Kev Ua Haujlwm Torque | Siab dua (kev sib txhuam tas li) | Qis dua (tsuas yog thaum zaum/tsis zaum xwb) |
| Kev Taw Qhia Txog Kev Sib Nqus | Feem ntau yog ib txoj kev taw qhia xwb | Bidirectional (tag nrho cov ntsuas siab) |
| Kev Ntsuas Qhov Xaim | Lub rooj zaum mos mos (lub rooj zaum uas nruj thiab npuas) | Chav Kawm VI (xoom pom tsis tau) rau PTFE; xoom qhov xau rau peb npaug |
| Kev Tsim Nyog Rau Daim Ntawv Thov | Dej qis, cua, kev pabcuam dav dav | Cov kua dej ua haujlwm, hydrocarbons, pa dej, cov khoom siv corrosive, kev pabcuam high-cycle |
| Tus nqi pib | Qis dua | Siab dua (20–40% feem pua ntawm cov nqi them ua ntej) |
| Lub Neej Pabcuam | Nruab nrab | Txuas ntxiv (100,000+ lub voj voog tau ua pov thawj) |
Lub qhov dej npauj npaim concentric tswj hwm kev lag luam dej thiab dej khib nyiab vim nws yooj yim, txhim khu kev qha, thiab tsis muaj npuas nrog lub rooj zaum mos. Txawm li cas los xij, rau txhua daim ntawv thov uas muaj kev kub siab tshaj 250 PSI, qhov kub siab tshaj 180 ° C, hydrocarbons, pa dej, lossis cov tshuaj lom neeg corrosive, lub qhov dej npauj npaim ua haujlwm siab yog qhov kev xaiv tsim kho kom raug.
Cov Zoo thiab Cov Tsis Zoo ntawm Cov Npauj Npaim Ua Haujlwm Zoo
Cov txiaj ntsig
| Qhov zoo | Kev Pab Cuam Engineering |
|---|---|
| Tsis muaj qhov xau / npuas-nruj kaw | Ua tiav ANSI/FCI 70-2 Chav Kawm VI qhov ntsuas kev xau; triple offset muab qhov tseeb xoom xau nrog lub rooj zaum hlau |
| Kev sib khi ob sab | Tswj kev kaw tag nrho tsis hais txog kev ntws mus li cas, tshem tawm kev txhawj xeeb txog kev teeb tsa |
| Lub zog ua haujlwm tsawg | Txo qhov loj thiab tus nqi ntawm cov actuator; txo kev siv hluav taws xob; cov actuators pneumatic lossis hluav taws xob me dua tuaj yeem siv tau |
| Lub neej ua haujlwm ntev dua | Kev sib cuag ntawm lub disc-rau lub rooj zaum tsuas yog thaum kaw xwb ua rau txo qhov hnav; pom tau tias muaj ntau tshaj 100,000 lub voj voog |
| Qhov chaw me me | Sib dua thiab luv dua li lub qhov rooj, lub ntiaj teb, lossis lub pob valve uas muaj qhov loj sib npaug, txo cov kev xav tau kev txhawb nqa kav dej |
| Muaj peev xwm ntws tau zoo | Qhov siab poob qis tshaj plaws thaum qhib tag nrho vim yog qhov profile disc streamlined |
| Kev xaiv cov khoom siv dav dav | Cov hlau carbon, hlau tsis xeb, duplex, alloy, thiab nickel txhuas tooj liab lub cev muaj rau kev pabcuam corrosive |
| Tsim kom muaj kev nyab xeeb rau hluav taws | Peb lub qhov rooj hlau uas muaj peb sab yog qhov muaj kev nyab xeeb hluav taws tsis muaj cov khoom PTFE |
| Qis qis qia xau | Cov txheej txheem ntim khoom PTFE lossis graphite siab heev ua tau raws li cov qauv kev tso pa tawm uas nruj heev (ISO 15848) |
Qhov tsis zoo
| Qhov tsis zoo | Kev Xav Txog Kev Yuav Khoom |
|---|---|
| Tus nqi pib siab dua | Kev tsim qauv zoo dua li kev tsim qauv sib npaug feem ntau yog 20–40%; lub rooj zaum hlau peb npaug offset ntau dua li qhov xav tau |
| Muaj peev xwm ua rau cavitation | Kev thawb ntawm qhov siab sib txawv siab yuav ua rau muaj kev puas tsuaj rau cavitation |
| Kev txav mus los ntawm disc tsis muaj kev taw qhia | Qhov chaw ntawm lub disc raug cuam tshuam los ntawm kev ntws turbulence, cuam tshuam rau qhov kev ua haujlwm ntawm qhov qhib qis |
| Nyuaj rau ntxuav | Cov qauv wafer thiab lug tsis yooj yim rau kev ntxuav sab hauv piv rau cov flanged valves |
| Tsis pom zoo rau kev pabcuam uas muaj viscous heev lossis slurry | Kev nkag mus rau hauv txoj kev ntws ntawm lub disc yuav ntes tau cov khoom khov; tej zaum yuav nyiam siv cov qhov rooj riam. |
| Kev txwv tsis pub muaj kev sib txawv ntawm qhov siab | Txawm hais tias zoo dua li cov concentric valves, cov npauj npaim valves ua haujlwm siab tsis zoo tagnrho rau cov ntawv thov throttling hnyav. |
Tus qauv tsim offset ua rau muaj kev ua haujlwm zoo dua ntawm lub foob, qis dua dynamic torque, thiab siab dua qhov tso cai siab dua li cov npauj npaim li qub, tab sis cov txiaj ntsig no los ntawm tus nqi pib siab dua.
Cov ntawv thov ntawm High Performance Butterfly Valves
Cov npauj npaim valve ua haujlwm tau zoo yog qhov tseem ceeb thoob plaws ntau yam lag luam uas kev ntseeg tau, xoom qhov xau, thiab kev tsim qauv me me yog qhov tseem ceeb:
Roj thiab Roj Av
- Kev rho tawm hydrocarbon refinery thiab bypass lines
- Cov kav dej roj av thiab cov roj av ntuj (kev rho tawm, kev xa mus, thiab kev faib tawm)
- Kev nqus thiab tso tawm ntawm chaw nres tsheb compressor
- Kev cais tawm ntawm lub tank farm
- Kev siv roj qaub (nrog cov ntaub ntawv ua raws li NACE MR0175)
Kev Ua Tshuaj Lom Zem thiab Petrochemical
- Kev siv tshuaj lom neeg uas muaj xeb (acids, alkalis, caustics, chlorinated compounds)
- Cov txheej txheem rov qab los ntawm cov kuab tshuaj
- Cov kab ntau lawm polymer
- Cov tshuaj zawv plaub hau dej qab zib
- Cov tshuaj reactors kub siab
Kev Tsim Hluav Taws Xob
- Cov tshuab ua dej txias (dej ncig thiab dej pabcuam)
- Kev rho tawm condenser
- Cov kab rho tawm cov pa dej (peb lub qhov dej sib txawv rau cov pa dej kub siab)
- Boiler feedwater bypass
- Kev rho tawm cua ntawm lub cav turbine
Kev Kho Dej thiab Dej Khib Nyhiab
- Kev haus dej nyoos thiab kev faib tawm (kev siv dej ntau zaus)
- Cov txheej txheem rov qab osmosis
- Cov txheej txheem lim dej membrane
- Cov ntawv thov roj digester
- Clarifier qhov nkag thiab qhov hluav taws xob
HVAC, Marine, thiab Lwm Yam Lag Luam
- Cov dej txias thiab cov dej kub cua sov
- Cov tes hauj lwm cua sov thiab cua txias hauv cheeb tsam
- Cov tshuab ballast thiab dej tua hluav taws hauv dej hiav txwv (cov hlau nickel txhuas tooj liab rau dej hiav txwv)
- Cov nroj tsuag Desalination siab siab rov qab osmosis
- Cov ntaub ntawv thiab ntawv (kev npaj cov khoom lag luam, kev rov ua dua tshuaj)
- Kev siv cov kav dej slurry thiab tailings los ntawm kev khawb av
- Kev tshawb fawb txog tshuaj thiab lub neej (dej ntshiab, pa huv)
Raws li kev tshawb fawb kev ua lag luam, cov lag luam uas xav tau kev tswj hwm qhov ntws kom meej—xws li roj & roj av, kev tsim hluav taws xob, thiab kev ua tshuaj lom neeg—yog cov tsav tsheb tseem ceeb ntawm kev xav tau lub valve npauj npaim ua haujlwm siab. Tshwj xeeb, cov valve triple offset feem ntau pom zoo rau kev siv tshuaj lom neeg, hluav taws xob, thiab kev ua kom huv, suav nrog kev rho tawm roj shale.
Tus nqi ntawm lub valve npauj npaim ua haujlwm siab: Tus nqi tseem ceeb thiab ntau yam
Rau cov kws tshaj lij kev yuav khoom, kev nkag siab txog yam uas txiav txim siab tus nqi ntawm lub valve npauj npaim ua haujlwm siab yog qhov tseem ceeb rau kev npaj nyiaj txiag kom raug.
Cov Yam Tseem Ceeb Uas Cuam Tshuam Rau Tus Nqi
| Qhov tseem ceeb | Kev cuam tshuam rau tus nqi |
|---|---|
| Qhov loj ntawm lub valve | Cov kab uas hla loj dua (saum toj no DN300) ua rau tus nqi pib nce ntxiv vim yog qhov ntim khoom thiab kev siv tshuab |
| Chav kawm siab | Chav Kawm 300: kwv yees li 30–50% nqi them tshaj Chav Kawm 150; Chav Kawm 600: ntxiv 25–40% |
| Kev xaiv cov khoom siv | Hlau tsis xeb (CF8/CF8M): 40–60% zoo dua li cov hlau carbon; duplex/super duplex: 100–150% zoo dua |
| Hom rooj zaum | Cov rooj zaum PTFE: nruab nrab; cov rooj zaum hlau laminated: 30–50% zoo dua; cov rooj zaum hlau peb npaug: siab tshaj |
| Xaus kev sib txuas | Wafer: pheej yig tshaj plaws; Lug: + 15–25%; Flanged: + 20–40% |
| Kev ua haujlwm | Lub zog tes: lub hauv paus; lub iav ua haujlwm: +15–25%; lub tshuab ua pa: +40–100%; lub tshuab ua hluav taws xob: +50–120% |
| Cov ntawv pov thawj tshwj xeeb | Muaj kev nyab xeeb rau hluav taws (API 607), cov pa phem uas tsis muaj pa phem (ISO 15848), NACE MR0175 ntxiv 5–15% |
| Cov kev cai xeem | Cov NDT ntxiv, kev kuaj cryogenic, lossis kev lees paub lub voj voog siab ua rau cov nqi nce ntxiv |
Cov Nqe Sawv Cev (Qhia)
| Loj | Chav Kawm 150 Wafer, WCB Lub Cev, PTFE Lub Rooj, Qib | Chav Kawm 300 Wafer, WCB Lub Cev, PTFE Lub Rooj, Iav | Chav Kawm 150 Wafer, CF8M Lub Cev, PTFE Lub Rooj, Pneumatic |
|---|---|---|---|
| DN50 (2″) | $85 – $120 | $180 – $250 | $400 – $550 |
| DN100 (4″) | $130 – $180 | $260 – $360 | $500 – $700 |
| DN150 (6″) | $180 – $250 | $350 – $480 | $650 – $900 |
| DN200 (8″) | $250 – $350 | $450 – $600 | $850 – $1,200 |
| DN300 (12″) | $450 – $620 | $750 – $1,050 | $1,400 – $2,000 |
| DN500 (20″) | $1,200 – $1,700 | $1,800 – $2,600 | $3,200 – $4,800 |
Lus Cim: Cov nqi tsuas yog qhia xwb thiab yuav hloov pauv raws li kev hloov pauv ntawm kev ua lag luam khoom siv thiab cov kev cai tshwj xeeb ntawm kev tsim kho. Thov kom muaj tus nqi ruaj khov rau koj daim ntawv thov.
Kev Xav Txog Tag Nrho Tus Nqi ntawm Kev Muaj Tswv (TCO)
Txawm hais tias lub valve npauj npaim ua haujlwm siab muaj tus nqi yuav khoom pib siab dua li lub valve concentric, nws tus nqi tag nrho ntawm kev muaj thoob plaws lub neej ntawm cov khoom siv feem ntau qis dua vim:
- Lub sijhawm txij nkawm ntev dua - Kev hnav lub rooj zaum tsawg dua txhais tau tias kev hloov pauv tsawg dua
- Lub zog ua haujlwm qis dua - Qhov yuav tsum tau ua kom lub zog torque tsawg dua ua rau cov actuators me dua thiab txo cov nqi hluav taws xob
- Tsis muaj kev nplua rau kev tso pa phem - Kev kaw lub qia zoo tshaj plaws zam kev them nqi raws li txoj cai
- Lub neej ua haujlwm ntev dua - Lub neej ua haujlwm ib txwm yog 10-15 xyoo hauv kev pabcuam nruab nrab, piv rau 5-8 xyoo rau cov qauv tsim concentric hauv cov xwm txheej zoo sib xws
Cov li qub ua haujlwm siab feem ntau pheej yig dua li cov pob lossis cov ntsaws uas muaj qhov loj thiab qib sib npaug, tseem muaj peev xwm sib khi zoo sib xws lossis zoo dua - ua rau lawv yog qhov kev xaiv zoo tshaj plaws rau feem ntau ntawm cov txheej txheem qhib / kaw uas tsis xav tau qhov xau.
Yuav Ua Li Cas Qhia Txog Lub Valve Npauj Npaim Uas Muaj Kev Ua Haujlwm Zoo
Rau cov kws tshaj lij kev yuav khoom uas tab tom npaj RFQ lossis daim ntawv xaj yuav khoom, cov yam ntxwv hauv qab no yuav tsum tau teev tseg kom ntseeg tau tias xaiv tau zoo:
| Tus cwj pwm | Cov Lus Qhia Tshwj Xeeb Yuav Tsum Tau Ua |
|---|---|
| Tus qauv tsim | API 609 Qeb B (kev ua tau zoo) |
| Hom valve | Ob chav offset (tus qauv) lossis peb chav offset (kev pabcuam hnyav heev) |
| Lub cev qauv | Wafer (feem ntau), lug (kev pabcuam tuag-kawg), lossis ob chav flange (qhov loj me / siab siab) |
| Loj | NPS 2″ – 48″ (loj dua muaj thaum thov) |
| Chav kawm siab | ASME Chav Kawm 150, 300, lossis 600 |
| Cov khoom siv lub cev | WCB (cov hlau carbon), CF8/CF8M (stainless), duplex, lossis alloy |
| Cov khoom siv disc | Qhia meej txog kev sib raug zoo ntawm cov kua dej |
| Cov khoom siv rau lub rooj zaum | PTFE (txheej txheem dav dav), hlau-rau-hlau (kub siab), lossis laminated |
| Lub rooj zaum xau | ANSI/FCI 70-2 Chav Kawm VI (ua npuas dej tsis nkag) lossis xoom qhov xau |
| Cov khoom siv qia | Feem ntau yog 17-4PH stainless hlau |
| Xaus kev sib txuas | ASME B16.5 los yog sib npaug |
| Lub ntsej muag rau lub ntsej muag | API 609 (qauv luv lossis qauv ntev) |
| Kev ua haujlwm | Tes tuav, iav tswj, pneumatic actuator, los yog hluav taws xob actuator |
| Cov kev cai tshwj xeeb | Muaj kev nyab xeeb rau hluav taws (API 607), cov pa phem uas tsis nkag mus rau hauv huab cua (ISO 15848), NACE MR0175 (kev pabcuam qaub), cryogenic |
| Kev kuaj xyuas | API 598 (kev sim siab ntawm lub plhaub thiab lub rooj zaum) |
Cov Qauv Tseem Ceeb thiab Cov Ntawv Pov Thawj
| Tus Qauv | Scope |
|---|---|
| API 609 | Tus qauv tsim tseem ceeb rau cov npauj npaim li qub - txhais Pawg A thiab Pawg B |
| ASME B16.34 | Kev ntsuas qhov siab thiab kub ntawm lub valve |
| ASME B16.5 / B16.47 | Qhov ntev ntawm flange |
| API 598 | Kev tshuaj xyuas lub valve thiab kev ntsuas siab |
| ANSI/FCI 70-2 | Kev faib tawm ntawm qhov xau ntawm lub rooj zaum valve (Chav Kawm VI = tsis muaj npuas) |
| API 607 / API 6FA | Tus qauv xeem kev nyab xeeb hluav taws |
| ISO 15848 | Kev ntsuam xyuas cov pa phem rau cov foob pob |
| ISO 5211 | Lub interface ntawm lub actuator |
| NACE MR0175 / MR0103 | Kev pabcuam qaub (ib puag ncig uas muaj H₂S) |
Cov Lus Nug Feem Ntau (FAQ)
Yog, tab sis muaj qee qhov kev txwv. Ob chav offset high-performance npauj npaim li qub muab cov yam ntxwv ntws linear thoob plaws 90 degrees ntawm kev sib hloov, ua rau lawv haum rau modulating tswj daim ntawv thov. Txawm li cas los xij, throttling ntawm qhov qhib qis heev (qis dua 15-20%) lossis hla siab sib txawv siab yuav ua rau cavitation hauv kev pabcuam kua. Triple offset li qub muab kev ua tau zoo throttling zoo dua vim lawv qhov kev tswj hwm siab. Rau kev tswj hwm throttling meej, sab laj nrog cov chaw tsim khoom cov coefficient ntws (Cv) nkhaus thiab cavitation cov ntaub ntawv rau qhov loj me thiab trim ntawm lub valve tshwj xeeb.
Wafer style:Lub valve raug clamped ntawm ob lub pipeline flanges. Qhov no yog qhov kev teeb tsa pheej yig tshaj plaws tab sis tsis pub tshem tawm cov piping downstream yam tsis tau txo qhov siab ntawm lub system. Wafer valves pheej yig dua 20–40% dua li lug valves ntawm tib qhov loj me.
Lub hom phiaj style:Lub cev valve muaj cov xov ntxig (lugs) ntawm ob sab, tso cai rau bolting rau flanges ntawm ob sab ywj pheej. Qhov no ua rau muaj kev pabcuam dead-end, txhais tau tias cov kav dej ntws tuaj yeem raug tshem tawm thaum sab saud tseem muaj kev nyem - tseem ceeb rau kev nkag mus rau kev saib xyuas. Cov lug valves kuj muab lub zog ntxiv rau hauv cov kab ke uas raug kev ntxhov siab ntawm cov kav dej.
Ob qho tib si muaj nyob rau hauv cov qauv sib khi bidirectional.
Xaiv peb npaug offset thaum:
- Kub tshaj 260 ° C (qhov txwv ntawm PTFE / RPTFE rooj zaum)
- Daim ntawv thov yuav tsum tau muaj qhov tseeb xoom-leakage hlau-rau-hlau kaw tawm
- Kev pabcuam suav nrog cov pa kub siab lossis cov roj hydrocarbon cais tawm qhov twg kev nyab xeeb hluav taws yuav tsum muaj
- Cov voj voog ntau xav tau qhov siab tshaj plaws tiv taus kev hnav
- Lub valve siv rau hauv kev pabcuam cryogenic (LNG, ethylene) - triple offset valves nrog cov ntaub ntawv tsim nyog ua haujlwm tau zoo ntawm qhov kub qis heev.
Xaiv ob chav offset (tus qauv kev ua tau zoo siab) thaum:
- Qhov kub qis dua 260 ° C
- PTFE lossis cov rooj zaum PTFE uas muaj zog muab kev sib raug zoo ntawm cov tshuaj lom neeg txaus
- Lub neej voj voog nruab nrab (kaum tawm txhiab lub voj voog) ua tau raws li qhov yuav tsum tau ua
- Tus nqi pib qis dua yog qhov tseem ceeb
Kev sim ywj pheej tau ua pov thawj tias lub valve kaw ruaj khov heev dhau ntau tshaj 100,000 lub voj voog rau cov valve zoo ob chav offset. Cov valve peb chav offset, nrog lawv cov rooj zaum hlau thiab cov qauv sealing tsis sib txhuam, tuaj yeem ua haujlwm ntev dua - feem ntau tshaj 250,000 lub voj voog hauv cov xwm txheej kev pabcuam nruab nrab. Lub neej voj voog tiag tiag nyob ntawm cov xwm txheej kev ua haujlwm, suav nrog lub siab, kub, kev huv ntawm cov kua, thiab kev ua haujlwm ceev.
Tsis yog. Ib qho txiaj ntsig tseem ceeb ntawm kev tsim qauv siab yog qhov muaj peev xwm kaw ob txoj kev. Tsis zoo li ntau lub qhov dej npauj npaim concentric, uas yuav muaj qhov kev taw qhia ntws nyiam luam tawm ntawm lub cev, cov qhov dej ua haujlwm siab tswj hwm qhov kev ua haujlwm kaw tag nrho txawm tias kev teeb tsa teeb tsa li cas los xij. Qhov no ua rau kev teeb tsa yooj yim thiab txo qhov kev pheej hmoo ntawm kev teeb tsa tsis raug.
Cov Lus Qhia Luv Luv rau Cov Kws Ua Haujlwm thiab Cov Kws Tshaj Lij Txog Kev Yuav Khoom
| Rau Kev Tsim Kho | Rau Kev Yuav Khoom |
|---|---|
| Cov li qub npauj npaim ua haujlwm siab (ob npaug / peb npaug offset) yog qhov kev xaiv zoo rau cov txheej txheem siab tshaj 250 PSI, qhov kub tshaj 180 ° C, thiab hydrocarbon, pa dej, lossis kev pabcuam corrosive. | Tus nqi pib siab dua li cov concentric valves (20–40%), tab sis TCO feem ntau qis dua vim yog lub neej ua haujlwm ntev dua thiab txo kev saib xyuas. |
| Qhov kev ua haujlwm ntawm lub cam (cov disc contacts tsuas yog zaum thaum kaw) yog qhov sib txawv tseem ceeb - qhov no tshem tawm kev hnav thiab ua rau muaj qhov torque tsawg thiab xoom qhov xau. | Thaum thov cov lus hais, qhia meej API 609 Qeb B, hom offset uas xav tau (ob lossis peb npaug), cov khoom siv zaum, thiab lwm yam ntawv pov thawj tshwj xeeb (kev nyab xeeb hluav taws, kev tso pa tawm, NACE). |
| Cov qhov dej sib txuas peb zaug muab cov hlau-rau-hlau xoom xau txog li 650 ° C thiab yog qhov muaj kev nyab xeeb hluav taws; ob chav qhov dej sib txuas nrog PTFE rooj zaum yog tsim nyog txog li 260 ° C | Kev cia siab tias yuav siv nyiaj ntau: Chav Kawm 150 wafer style nrog lub cev hlau carbon thiab lub rooj zaum PTFE feem ntau yog $ 100–1,000 nyob ntawm qhov loj me; Chav Kawm 300 ntxiv 30–50%; lub rooj zaum hlau ntxiv 30–50%; kev ua haujlwm tuaj yeem ob lossis peb npaug tus nqi ntawm lub valve puag. |
| Ib txwm xyuas kom meej tias lub valve xaiv tau ua raws li API 609 Qeb B cov kev cai rau kev ntsuas siab-kub | Xav txog kev khaws cov khoom siv rooj zaum seem rau cov ntawv thov tseem ceeb - kev hloov rooj zaum yooj yim thiab ua rau lub valve siv tau ntev dua. |
Rau txhua daim ntawv thov uas tus qauvNpauj Npaim ValvesYog tias lub valve (Qeb A) tsis txaus rau qhov siab, kub, lossis cov xwm txheej ntawm cov xov xwm, lub valve npauj npaim ua haujlwm siab (Qeb B) yog qhov kev daws teeb meem uas tau ua pov thawj thiab pheej yig - xa qhov kev ntseeg siab ntawm lub pob lossis lub valve ntsaws nrog qhov chaw me me thiab qhov hnyav tsawg ntawm lub valve npauj npaim, ntawm tus nqi qis dua.
Cov ntaub ntawv kev tshaj lij saum toj no txog npauj npaim li qub los ntawm pab pawg neeg ua haujlwm ntawmChaw Tsim Khoom Siv Npauj Npaim Valve- NSW VALVE.
Lub sijhawm tshaj tawm: Lub Rau Hli-07-2026