Valves ntxuav
Ib Daim Ntawv Qhia Txog Kev Tu Valve
Lwm cov xov xwm uas yuav tsum tau ua kom huv huv no suav nrog ntau lwm cov pa roj ntshiab, tshuaj chlorine, pleev xim thiab qee yam tshuaj. Tag nrho qhov no txhais tau tias yog tus qauv, tawm ntawm lub txee tsis tuaj yeem siv rau hauv cov xov xwm no tshwj tsis yog nws tau ua tiav zoo ua ntej kev teeb tsa. Ntau xyoo dhau los, ua tiav qhov kev huv huv no yuav tsum tau siv cov tshuab vapor degreasing uas muaj cov tshuaj chlorinated hnyav xws li trichloroethane. Cov tshuaj no tau ua haujlwm zoo heev los ntxuav, tab sis lawv tau raug pov thawj tias yog cov carcinogens, yog li lawv cov kev siv tu hauv tsev tau tag nrho tab sis ploj mus. Nyob rau hauv lawv qhov chaw, ib puag ncig tus phooj ywg aqueous-raws li kev ntxuav, tau dhau los ua qhov qub.
Ua raws li Specs
Txawm hais tias siv tus neeg saib xyuas zoo, txawm li cas los xij, nws yuav siv sij hawm ntau tshaj qhov yooj yim "ntxuav qab pob ntseg" kom ntseeg tau tias lub valve yog huv txaus rau kev pab cuam. Qhov no yog qhov chaw tu cov qauv thiab cov lus qhia tshwj xeeb tuaj rau hauv. Hmoov zoo, muaj cov lus qhia zoo heev los qhia cov neeg ua haujlwm valve thiab cov kws tshaj lij hauv cov txheej txheem tu. Qhov tseeb, American Society for Testing and Materials (ASTM) muaj ib pawg neeg ua haujlwm nkaus xwb rau cov kev qhia tshwj xeeb rau kev siv oxygen: Pawg G04. Cov pab pawg no tsim cov ASTM G93, "Txoj Cai Ua Haujlwm rau Cov Khoom Siv thiab Cov Khoom Siv Siv Hauv Cov Khoom Siv Hluav Taws Xob" uas yog cov ntaub ntawv zoo heev thiab siv tau zoo heev rau cov txheej txheem ntxuav lub valve.
Lub Koom Haum Compressed Gas Association (CGA) tshaj tawm lwm tus qauv kev tu vaj tse uas feem ntau hais txog: daim ntawv CGA G-4.1, "Tsev Khoom Siv Rau Kev Pabcuam Oxygen." Ntau tus neeg siv kawg uas tsis muaj lawv tus kheej cov txheej txheem tshwj xeeb siv CGA 4.1 tus qauv. Lub Koom Haum Tsim Kho Kev Lag Luam (MSS) kuj tsis ntev los no tau tsim cov qauv kev tu lub valve, MSS SP-138-2009, "Cov Qauv Zoo rau Oxygen Cleaning Valves & Fittings." Cov ntaub ntawv no tau muab los ntawm ntau tus neeg siv khoom tshwj xeeb nrog rau CGA G-4.1. Rau kev tu cov tshuaj chlorine, lub koom haum Chlorine hais txog cov txheej txheem ntxuav hauv nws cov ntaub ntawv: "Piping Systems for Dry Chlorine."
Qhov kev faib ua feem rau tag nrho cov qauv kev ntxuav yog tshem tawm tag nrho cov kab ntawm cov roj, roj, av thiab lwm yam kab mob. Cov txheej txheem tau sau tseg suav nrog txhuam, ntxuav ultrasonic, siab blasting thiab xuab zeb blasting.
Kev tshem tawm xeb
Ib qho teeb meem tseem ceeb hauv kev tu yog qhov muaj xeb ntawm cov pa roj carbon steel tom qab ntxuav. Nrog rau ib qho ntawm cov txheej txheem ntxuav, cov yeeb yaj kiab tiv thaiv lossis xeb tiv thaiv ntawm cov hlau raug tshem tawm, uas ua rau cov hlau ua rau oxidation sai, ib qho teeb meem tshwj xeeb tshaj yog nyob rau hauv qhov chaw ntub dej. Nyob rau hauv ntau zaus, lub teeb blush ntawm xeb yog txais, tab sis tag nrho deposits yuav tsis yog. Yog li ntawd, kev tu yuav tsum tau ua nyob rau hauv ib qho chaw tsis muaj av noo. Tsis tas li ntawd, cov pa roj carbon steel li qub thiab cov khoom uas tau raug ntxuav yuav tsum tau muaj qee yam kev tiv thaiv corrosion-txawm tias lub hnab desiccant tso rau hauv lub valve bore los yog sab nrauv qhwv nrog vapor theem inhibitor ntawv, los yog ob qho tib si.
Tom qab li qub tau ua tib zoo ntxuav thiab kuaj xyuas kom huv si, lawv feem ntau muab tso rau hauv cov hnab yas tiv thaiv hnyav kom ntseeg tau tias lawv nyob twj ywm kom txog thaum kev teeb tsa.
Kev ntxuav ntawm li qub yog ib txoj kev ncaj nraim uas yuav tsum tau muaj kev mob siab rau thiab kev tswj kom zoo. Txawm li cas los xij, kev taw qhia yog muaj los ntawm ntau yam qauv thiab kev qhia tshwj xeeb. Tsis tas li ntawd, txij li lub li qub yuav tsum tau disassembled rau feem ntau cov txheej txheem tu, nws yog ib qho tseem ceeb uas cov neeg ua hauj lwm koom nrog yuav tsum tau paub txog kom zoo disassembly thiab rov sib dhos ntawm lub li qub kom huv si.
Cryogenic li qub tshwj xeeb tu thiab kev txhawj xeeb
Cryogenic li qub xav tau kev tu tshwj xeeb thiab degreasing los ntawm cov chaw tsim khoom valve. Qhov no yog ua tiav nrog cov kuab tshuaj tshwj xeeb kom degrease thiab tshem tawm cov kab mob organic, thiab feem ntau yog siv cov tshuaj ntxuav ultrasonic. Qee qhov kev pabcuam xws li cov pa oxygen lossis cov tshuaj chlorine xav tau kev huv huv heev kom paub tseeb tias tsis muaj cov ntaub ntawv organic lossis lint fibers tom qab ntxuav. Kev ntxuav kom zoo thiab muaj ntawv pov thawj li qub tau muab tso rau hauv ob lub hnab ntim polyethylene kom paub tseeb tias lub valve tseem ntxuav kom txog thaum lub sijhawm teeb tsa lub valve.
Cov neeg ua haujlwm yuav tsum ua tib zoo tshuaj xyuas cov khoom siv cryogenic ua ntej txhim kho lawv. Qhov no yog qhov tseem ceeb kom ntseeg tau tias tsis muaj roj lossis roj tau raug yuam kev nkag mus rau hauv lub valve. Qee cov lubricants tshwj xeeb tau pom zoo rau kev pabcuam oxygen; lawv lub xub ntiag tuaj yeem tso cai, tab sis qhov no txawv ntawm daim ntawv thov.
Raws li tau hais ua ntej, cov khoom siv cryogenic yuav tsum tau khaws cia tsis muaj lint. Feem ntau hais lus fiber ntau dua 1/8 "nyob rau hauv ntev tsis pub muaj nyob rau hauv lub valve ntxuav. Feem ntau, tsis muaj fibers lossis lint tuaj yeem raug tso cai nyob tsis hais qhov ntev. Cov khib nyiab zoo li no tuaj yeem ua pov thawj txaus ntshai hauv cov pa oxygen. Ntau tus kws tshaj lij kev lag luam siv cov teeb pom kev dub los pab tshawb xyuas cov fibers.
Thaum kawg, cov neeg soj ntsuam yuav tsum tsis tu ncua xyuas cov li qub cryogenic thiab cov pa oxygen rau ob qho tib si sab hauv thiab sab nraud. Sab hauv, cov dej xau tuaj yeem tiv thaiv tau los ntawm kev ua kom ntseeg tau tias lub valve zoo nyob rau hauv qhov chaw thiab nws muaj qhov pov thawj zoo sealing tsim. Cryogenic tej yam kev mob tshwj xeeb xav tau cov ntsaws ruaj ruaj ruaj los txhawb lub neej ntev. External leakage kuj yog ib qho kev txhawj xeeb tseem ceeb. Feem ntau lub sij hawm weld end designs yuav tsum tau. Cov no tuaj yeem yog nyob rau hauv daim ntawv ntawm pob tw weld xaus los yog lub qhov (socket weld) xaus ntawm lub li qub.
High Pressure Valve Maintenance Guide
Kev Tshawb Fawb
Tej zaum qhov tseem ceeb tshaj plaws kev saib xyuas yog kev tshuaj xyuas niaj hnub. Qhov no yog koj txhais tau tias txhawm rau txheeb xyuas cov teeb meem muaj peev xwm nrog lub valve.
Lub sijhawm tshuaj xyuas nyob ntawm ntau yam sib txawv. Lub kaw lus ua haujlwm ntau npaum li cas? Lub siab npaum li cas ntawm lub valve?
Ntsuas cov khoom siv rau kev hnav thiab tsim kua muag thiab cov cim qhia ntawm cov khib nyiab txawv teb chaws. Kuj xyuas kom paub tseeb tias cov strainers los yog plugged fittings tsis tau txhaws los yog thaiv.
Dismantling lub Valve
Koj yuav tsum tau rhuav tshem lub valve kom ua tiav kev ntsuam xyuas. Qhov no yog txheej txheem ntau kauj ruam uas tsis nyuaj.
Ua ntej, tshem tawm tag nrho cov siab ntawm lub valve. Tam sim no koj tuaj yeem tshem tawm lub valve los ntawm qhov system nws nyob.
Cov kauj ruam tom ntej yog qhib lub valve qia. Tom ntej no, koj yuav tsum tau loosen cov khoom siv xauv lub npe hu ua lub caj pas ntim khoom. Los ntawm kev ua cov kauj ruam no, koj npaj txhij los ua qhov kev tshuaj xyuas, hloov kho, lossis hloov pauv.
Kev hloov
Qee zaum, lub valve tsuas yog xav tau kev hloov me me. Qhov no tshwm sim los ntawm zawm lub caj pas packing rau tus nqi torque.
Cov chaw tsim khoom feem ntau muab qhov xav tau torque qhov tseem ceeb. Lawv tuaj yeem pom hauv online lossis hauv phau ntawv qhia kev.
Ntxuav thiab Lubrication
Lub valve qia yog ib qho ntawm cov khoom tseem ceeb tshaj plaws. Yog tias nws tsis txav mus los, nws yuav tsum tau ntxuav thiab lubrication.
Koj tseem yuav tsum tshem tawm cov nplai lossis cov seem seem. Thaum kawg, yog tias ib qho khoom siv sab nraud raug hnav, nws yuav tsum tau hloov.
Hloov
Yog tias lub valve puas dhau los kho, nws yuav tsum tau hloov. Es tsis txhob loosening lub caj pas ntim, koj yuav tsum tau tshem tawm tag nrho. Cov kauj ruam no suav nrog tshem lub qia valve.
Tom ntej no, koj yuav hloov lub qia thiab packing caj pas. Xyuas kom tseeb tias cov khoom ntim ntim rau hauv lub valve lub cev. Zoo li txoj haujlwm hloov kho, koj kuj yuav tsum tau ua kom nruj lub caj pas ntim rau lub zog uas tau teev tseg.
Ib Recap ntawm High Pressure Valve Maintenance
Thaum zoo li ib feem me me, lub valve tsis ua haujlwm tuaj yeem tsim teeb meem loj. Kev ua haujlwm txij nkawm zoo li niaj hnub tshuaj xyuas thiab hloov kho mus ntev.