1.: Dab tsi yog Qhov Hluav Taws Xob Flange Globe Valve?
Lub tshuab hluav taws xob flange ntiaj teb valve yog linear -kev tswj lub valve uas sib txuas lub flanged ntiaj teb valve lub cev nrog ib qho hluav taws xob ntau- tig actuator. Nyob rau hauv lub cev, ib tug disc txav perpendicular mus rau lub rooj zaum dav hlau raws li axis ntawm lub raj xa dej; throttling thiab kaw -off yog ua tiav los ntawm qhov sib txawv ntawm qhov sib txawv ntawm lub disc thiab lub nplhaib lub rooj zaum. Qhov nce qia txuas nrog lub tshuab hluav taws xob uas hloov hluav taws xob hluav taws xob mus rau hauv cov lus tsa suab thiab tom qab ntawd mus rau hauv kab tawm mus los ntawm lub qia txiv ntoo thiab iav tsheb ciav hlau.
Piv nrog lub rooj vag li qub, lub ntiaj teb li qub muaj peev xwm ua kom lub zog zoo dua thiab kaw nruj dua -tawm, ntawm tus nqi siab dua. Kev sib txuas flanged (rau ASME B16.5, ISO 7005 lossis EN 1092-1) muab lub zog ruaj khov, xau- tiv thaiv kev sib koom ua ke uas haum rau nruab nrab- thiab cov kav dej siab, thaum lub tshuab hluav taws xob ua kom muaj chaw taws teeb, tsis siv neeg thiab tsis tuaj yeem ua haujlwm.
2. Technical Parameters thiab Design Standards
| Parameter | Standard Range (qhov no series) | Sau ntawv |
|---|---|---|
| Qhov ntau thiab tsawg | DN15 - DN600 (NPS 1/2 "- 24") | Qhov loj dua qhov kev thov |
| Kev ntsuas siab | PN16 - PN160 (Hoob 150 - 900) | Forged{0}} lub cev tsim mus txog Chav Kawm 1500/2500 raws li kev thov |
| Cov khoom siv lub cev | Carbon steel (WCB), stainless hlau (CF8 / CF8M / 304 / 316L), hlau alloy (WC6 / WC9 hom) | Cryogenic qib (LCB/LC3) muaj |
| Trim / rooj | Hlau rooj (13Cr los yog cobalt{1}}raws li hardfacing), PTFE, graphite | Kev xaiv nyob ntawm kev tshaj tawm & kub |
| Ntim | Flexible graphite / PTFE | Tsawg-emission packing xaiv tau |
| Qhov kub thiab txias | -29℃rau 425℃(carbon steel); mus txog 540-600℃(alloy steel) | Paub meej nrog cov khoom qib & siab derating |
| Tsim & tsim khoom | ASME B16.34, API 623 (bolted bonnet ntiaj teb li qub) | GB / T 12235 rau cov haujlwm hauv tsev |
| Ntsej muag -rau- ntsej muag | ASME B16.10 / ISO 5752 / EN 558 | Ntev lossis luv qauv |
| Flange kev twb kev txuas | ASME B16.5 / ISO 7005 / EN 1092-1 / GB / T 9113 | RF, FF lossis RTJ tig |
| Kev kuaj & tshuaj xyuas | Daim ntawv pov thawj: API 598 / ISO 5208 | Hydrostatic plhaub & kuaj lub rooj zaum |
| Actuator xaiv | Multi-tig hluav taws xob: 24V DC, 220V AC lossis 380V AC; on/off lossis modulating (4-20 mA); IP65 / IP67; tawg-pov thawj Ex d yeem | Manual override suav nrog |
Txhua qhov siab- qhov ntsuas kub ua raws li txoj cai derating ntawm ASME B16.34 thiab yuav tsum tau kuaj xyuas lub cev thiab cov khoom siv ua ntej xaiv.
3. Cov yam ntxwv tseem ceeb thiab txoj hauv kev ua haujlwm
Throttling muaj peev xwm: linear disc mus txawv tebchaws muab proportional flow tswj; ua ke nrog lub modulating actuator thiab positioner, lub valve tuaj yeem tswj cov dej ntws nrog qhov tseeb tsim nyog.
Tight kaw -off: hlau- zaum los yog PTFE / graphite- zaum xaiv tau raws li API 598 / ISO 5208 qhov yuav tsum tau ua, ua kom cov dej ntws sab hauv qis hauv qhov chaw kaw.
Chaw taws teeb automation: hluav taws xob actuation txhawb PLC / DCS tswj, 4-20 mA tawm tswv yim, qhib / kaw cov cim qhia thiab ua txhaum lub tswb tawm rau cov nroj tsuag tsis muaj neeg saib xyuas.
Muaj zog flange sib koom ua ke: bolted flanged xaus yooj yim installation, tshuaj xyuas thiab txij nkawm piv nrog welded kawg.
Kev nyab xeeb nta: torque txwv hloov, thermal overload tiv thaiv thiab phau ntawv tuav tes override tiv thaiv tus actuator thiab lub valve los ntawm kev puas tsuaj.
4. Daim ntawv thov Scenarios
| Kev lag luam | Hom Lub Luag Haujlwm | Common Spec |
|---|---|---|
| Petrochemical | Automated tsheb thauj mus los thiab kev tswj cov roj crude, refined khoom thiab chemical media | DN50-DN200, carbon steel lub cev, tawg-pov thawj actuator |
| Kev tsim hluav taws xob | Siab -kev tswj qhov kub thiab txias turbine auxiliary systems | DN25-DN80, alloy steel lub cev, hlau rooj, mus txog 540 degree |
| Municipal dej & dej khib nyiab | Cog piping tswj, backwash thiab dosing kab | DN80-DN300, WCB / SS lub cev, 1.0-2.5 MPa |
| Khoom noj khoom haus & tshuaj | Hloov cov kua dej huv qhov chaw huv huv | DN15-DN50, 316L lub cev, PTFE lub rooj, GMP-raws li tsim |
Rau cov kev pabcuam uas muaj cov khib nyiab nkag los yog coking nyiam, sab laj nrog pab pawg engineering - lub ntiaj teb valve feem ntau tsis yog thawj qhov kev xaiv rau cov khoom qias neeg lossis cov kua nplaum.
5. Kev xaiv, kev teeb tsa thiab kev saib xyuas qhov tseem ceeb
Kev xaiv: txiav txim siab qhov xav tau Cv (flow coefficient) los ntawm cov txheej txheem ntws thiab siab poob; xaiv cov chav kawm siab los ntawm qhov siab tshaj plaws kaw -off siab thiab kub; ces phim lub actuator torque/thrust (xws li lub rooj zaum-loading force thiab packing friction) nrog rau kev nyab xeeb ntawm qhov tsawg kawg nkaus 25%. Rau lub luag haujlwm modulating, qhia lub positioner nrog 4-20 mA input thiab tawm tswv yim.
Kev teeb tsa: khaws lub qia ntsug lossis hauv qhov chaw tsim khoom tso cai qaij lub kaum sab xis; muab kev tshem tawm txaus saum lub actuator rau kev kho; txhawb nqa hnyav actuators kom tsis txhob khoov loads ntawm lub kaus mom. Rau qhov kev pab cuam chav, nruab qhov ntws thiab hla kev npaj raws li qhov xav tau los ntawm cov kav dej tsim cov lej.
Kev tu: ib ntus tshuaj xyuas cov ntim khoom thiab rov ua dua -torque lub caj pas; tshawb xyuas lub rooj xau los ntawm kev kaw qhov siab ntawm API 598; lubricate qia threads thiab actuator gearbox ib lub sijhawm; txheeb xyuas qhov kev txwv torque ua ntej re-commissioning.
6. Kev xav tsis zoo
"Lub ntiaj teb li qub yog rau hauv / tawm lub luag haujlwm zoo li lub rooj vag li qub" - lub rooj vag li qub yog qhov zoo dua rau qis- ua haujlwm ntawm / tawm; lub ntiaj teb li qub ua tau zoo ntawm qhov throttling thiab kaw nruj -tawm qhov kev poob siab tau txais.
"Kev siv hluav taws xob txhais tau tias muaj kev tswj xyuas meej" - ib qho qhib / tawm actuator tsuas yog qhib / kaw; Cov kev cai nruj yuav tsum muaj lub modulating actuator nrog positioner.
"Cov chav kawm siab dua ib txwm zoo dua" - oversizing nce nqi thiab torque; xaiv cov chav kawm uas npog qhov tseeb siab tshaj plaws ntawm kev ua haujlwm kub.
"Stainless hlau tuaj yeem ua qhov kub thiab txias" - 304/316L poob lub zog ntawm qhov kub thiab txias; saum toj no ~ 400℃alloy steel los yog derating ib ASME B16.34 yuav tsum tau.
"Cov rooj zaum mos muab xoom xau txhua qhov chaw" - PTFE rooj zaum haum huv si, nruab nrab-kub tawm; cov rooj zaum hlau yog xav tau rau qhov kub thiab txias, chav thiab cov kev pabcuam erosive.
Cov lus nug nquag
Dab tsi yog qhov txawv ntawm lub ntiaj teb valve thiab lub rooj vag hluav taws xob?ntiaj teb valve throttles ntws thiab kaw nruj nreem los ntawm linear disc mus txawv tebchaws tab sis muaj ntau dua ndlwg tsis kam; lub rooj vag valve muab ze li qhov tsis muaj kev txwv thaum qhib tag nrho (tsis tshua muaj siab poob) thiab npaj rau kev pabcuam rau / tawm. Siv lub ntiaj teb valve thaum xav tau kev cai, lub rooj vag valve thaum tsawg kawg siab poob teeb meem.
Lub tshuab hluav taws xob flange ntiaj teb valve puas tuaj yeem siv rau ntawm cov kab?Yog lawm, muab cov khoom siv lub cev thiab cov chav kawm siab ua kom haum rau chav dej. Rau saturated los yog superheated chav siab tshaj li 425 degree, siv alloy steel (WC6 / WC9 hom) lub cev nrog hlau rooj thiab graphite packing, thiab ua raws li lub siab - kub derating ntawm ASME B16.34.
Cov chav kawm loj thiab siab npaum li cas muaj?Cov flanged series no suav nrog DN15-DN600 thiab PN16-PN160 (Class 150-900). Forged-lub cev lub ntiaj teb li qub hauv cov chav kawm siab dua (Class 1500/2500) tuaj yeem muab tau raws li kev thov; paub meej qhov kev ntaus nqi, cov khoom siv thiab xaus kev sib txuas nrog peb cov engineers.
Dab tsi actuator fais fab kev xaiv koj muab?Cov qauv kev xaiv yog 24V DC, 220V AC thiab 380V AC peb-theem, nrog rau / tawm lossis kev tswj hwm kev tswj hwm (4-20 mA cov tswv yim thiab tawm tswv yim), IP65 / IP67 enclosure thiab xaiv tau tawg-pov thawj (Ex d) kev tsim kho rau thaj chaw muaj kev phom sij.
Kuv yuav xaiv li cas ntawm cov hlau- zaum thiab mos- zaum trim?Cov rooj zaum hlau (13Cr lossis cobalt-raws li hardfacing) yog rau qhov kub thiab txias, chav dej, erosive lossis siab - cov kev pabcuam voj voog; PTFE/graphite zaum muab kaw nruj dua-tawm rau cov kua dej huv ntawm qhov kub nruab nrab. Muab cov xov xwm, qhov kub thiab txias, thiab peb yuav pom zoo rau kev sib xyaw kom raug.
Kuv puas tuaj yeem tau txais kev cai hluav taws xob flange ntiaj teb valve?Yog lawm. Kev cai qia ntev, actuator ua, flange tig, cov ntaub ntawv tshwj xeeb trim thiab qis -emission packing muaj. Xa koj cov ntaub ntawv los yog P&ID rho tawm mus rau peb pab neeg ua haujlwm engineering rau kev thov.