Valve installation qhia phau ntawv Kev teeb tsa thiab kev saib xyuas ntawm corrosion-resistant fluorine lined valve

Valve installation qhia phau ntawv Kev teeb tsa thiab kev saib xyuas ntawm corrosion-resistant fluorine lined valve Qhov kub thiab txias li qub yog ntsia ntawm atmospheric kub. Hauv kev siv tswv yim, thaum qhov nruab nrab dhau mus, nws dhau los ua lub xeev kub qis. Vim qhov sib txawv ntawm qhov kub thiab txias, flanges, gaskets, bolts thiab txiv ntseej, thiab lwm yam, shrinkage, thiab vim hais tias cov ntaub ntawv ntawm cov khoom no tsis zoo ib yam, lawv cov linear expansion coefficient kuj txawv, tsim ib qho yooj yim heev rau xau ib puag ncig tej yam kev mob. Los ntawm qhov teeb meem no lub hom phiaj, thaum nruj bolts ntawm atmospheric kub, lub torque uas yuav siv sij hawm mus rau hauv tus account lub contraction yam ntawm txhua yam ntawm qhov kub thiab txias yuav tsum tau saws. 1. Kev txhim kho thiab disassembly ntawm li qub 1.1 Kev ceev faj rau kev tu thiab kev teeb tsa 1). Lub valve yuav tsum tau muab tso rau hauv chav qhuav thiab qhov cua, thiab ob qhov kawg ntawm txoj kab uas hla yuav tsum tau muab kaw thiab tsis muaj plua plav; 2). Lub sij hawm ntev cia yuav tsum tau soj ntsuam tsis tu ncua, thiab cov txheej txheem yuav tsum tau coated nrog roj los tiv thaiv corrosion; 3) Ua ntej kev teeb tsa valve, ua tib zoo xyuas seb lub cim puas yog raws li kev siv; 4). Thaum lub sij hawm installation, lub puab kab noj hniav thiab sealing nto yuav tsum tau muab ntxuav, thiab cov packing yuav tsum tau kuaj xyuas seb nws yog nias nruj nreem, thiab cov bolts txuas yuav tsum nruj nreem. 5). Lub valve yuav tsum raug ntsia raws li txoj haujlwm tso cai, tab sis yuav tsum tau them nyiaj rau kev saib xyuas thiab kev ua haujlwm yooj yim; 6) Nyob rau hauv kev siv, tsis txhob qhib ib feem ntawm lub rooj vag valve los kho tus nqi ntws, thiaj li tsis ua kom puas lub sealing nto thaum nruab nrab tus nqi siab, nws yuav tsum tau qhib tag nrho los yog kaw tag nrho; 7). Thaum tig lub log ntawm tes rau lossis tawm, tsis txhob siv lwm cov pab txhawb nqa; 8). Cov khoom sib kis yuav tsum tau lubricated tsis tu ncua; Lub valve yuav tsum tau oiled nyob rau hauv lub rotating ib feem thiab qia trapezoidal xov ib feem 9) Tom qab kev txhim kho, yuav tsum tau ua tib zoo saib xyuas kom tshem tawm cov av nyob rau hauv lub puab kab noj hniav, xyuas lub sealing nto thiab hnav ntawm lub valve qia txiv ntoo; 10). Yuav tsum muaj cov txheej txheem kev tshawb fawb thiab kev txhim kho kom raug, kev ntsuas kev sib khi yuav tsum tau ua hauv kev saib xyuas, thiab cov ntaub ntawv ntxaws ntxaws yuav tsum tau ua rau kev tshawb xyuas 11) Lwm yam teeb meem xav tau kev saib xyuas: 1) Valves feem ntau yuav tsum tau muab tso ua ntej kev teeb tsa cov kav dej. Cov yeeb nkab yuav tsum yog ntuj, txoj hauj lwm tsis yog ib qho nyuaj rub, thiaj li tsis tawm ntawm lub prestress; 2) Ua ntej tso qhov ntsuas kub qis yuav tsum nyob deb npaum li qhov ua tau hauv lub xeev txias (xws li hauv cov kua nitrogen) ua qhov kev sim qhib thiab kaw, hloov pauv thiab tsis muaj qhov tshwm sim tshwm sim; 3) Cov kua dej yuav tsum tau teeb tsa nrog 10 ° qaij lub kaum sab xis ntawm lub qia thiab theem kom tsis txhob muaj cov kua ntws tawm ntawm lub qia thiab ua rau kom txias poob; Qhov tseem ceeb tshaj, nws yog ib qho tsim nyog yuav tsum tsis txhob ua kom cov kua kov lub sealing nto ntawm lub ntim, kom nws txias thiab tawv thiab poob lub sealing nyhuv, ua rau kom to; 4) kev sib txuas ntawm kev ruaj ntseg valve yuav tsum yog lub luj tshib kom tsis txhob cuam tshuam ncaj qha rau lub valve; Ntxiv nrog rau xyuas kom meej tias qhov kev nyab xeeb valve tsis khov, thiaj li tsis ua haujlwm tsis ua haujlwm; 5) kev teeb tsa ntawm lub ntiaj teb valve yuav tsum ua kom qhov nruab nrab ntws kev taw qhia zoo ib yam nrog cov xub cim ntawm lub valve lub cev, kom lub siab ntawm lub valve sab saum toj lub khob hliav qab thaum lub valve kaw, thiab cov ntim tsis nyob rau hauv load. Tab sis tsis yog feem ntau qhib thiab kaw thiab yuav tsum tau nruj me ntsis xyuas kom meej tias nyob rau hauv lub xeev kaw tsis txhob xau lub valve (xws li cua sov valve), yuav tsum nco ntsoov thim rov qab, nrog kev pab los ntawm nruab nrab siab kom nws kaw; 6) cov lus qhia loj ntawm lub rooj vag valve, pneumatic tswj valve yuav tsum tau nruab vertically, yog li tsis txhob cuam tshuam rau ib sab vim qhov hnyav ntawm lub spool, ua rau cov neeg kho tshuab hnav ntawm lub spool thiab bushing, uas ua rau to; 7) Thaum tuav cov ntsia hlau nias, lub valve yuav tsum nyob rau hauv lub xeev qhib me ntsis, thiaj li tsis ua kom puas lub sealing nto ntawm lub valve saum; 8) Tom qab tag nrho cov li qub nyob rau hauv qhov chaw, lawv yuav tsum tau qhib thiab kaw dua, thiab tsim nyog yog tias lawv hloov tau thiab tsis daig; 9) Tom qab cov huab cua loj sib cais ntauwd yog txias liab qab, qhov sib txuas valve flange yog pre-tightened ib zaug nyob rau hauv lub txias txias los tiv thaiv kom tsis txhob nyob rau hauv chav tsev kub thiab to ntawm tsawg kub; 10) Nws yog nruj me ntsis txwv tsis pub nce lub valve qia raws li scaffold thaum lub sij hawm installation 11) Lub siab kub valve siab tshaj 200 ℃, vim hais tias lub installation yog nyob rau hauv chav tsev kub, thiab tom qab ib txwm siv, qhov kub thiab txias nce, bolts yog thermal expansion, qhov sib txawv yog nce, yog li nws yuav tsum tau nruj dua, hu ua "kub nruj", tus neeg teb xov tooj yuav tsum tau xyuam xim rau txoj hauj lwm no, txwv tsis pub nws yooj yim rau xau. 12) Thaum huab cua txias thiab lub valve kaw tau ntev, cov dej tom qab lub valve yuav tsum raug tshem tawm. Tom qab lub chav valve nres chav, cov dej condensed kuj yuav tsum raug cais tawm. Lub hauv qab ntawm lub valve ua raws li cov hlua hlau, uas tuaj yeem qhib kom ntws dej. 13) Cov khoom siv tsis yog xim hlau, qee qhov tawv tawv, qee qhov tsis muaj zog, kev ua haujlwm, qhib thiab kaw quab yuam tsis tuaj yeem loj dhau, tshwj xeeb tshaj yog tsis tuaj yeem ua kom muaj zog. Kuj ua tib zoo saib kom tsis txhob muaj khoom tawg. 14) Thaum siv lub valve tshiab, cov ntim khoom yuav tsum tsis txhob nias kom nruj heev kom tsis txhob xau, yog li kom tsis txhob muaj lub siab ntau dhau ntawm lub qia, nrawm hnav, thiab qhib thiab kaw. Corrosion resistance Fluorine lining valve installation thiab txij nkawm Lub corrosion kuj valve thiab pipeline accessories ntawm lub hauv ob sab phlu, vim lawv lub cev thiab tshuaj muaj pes tsawg leeg, muaj cov yam ntxwv nram qab no nyob rau hauv lub installation, kho thiab txij nkawm ntawm cov khoom: Terminology thiab piav qhia (a) tag nrho cov ntaub ntawv feem ntau yog hais txog lub puab phab ntsa ntawm lub valve lub cev, valve npog thiab lwm yam siab ncaj qha nyob rau hauv kev sib cuag nrog nruab nrab. Sab nrauv ntawm lub valve qia, npauj npaim phaj, qaib ntxhw thiab kheej kheej thiab lwm yam sab hauv yog coated nrog ib tug tej thickness ntawm yas corrosion resistant valve los ntawm txoj kev molding. Cov khoom siv feem ntau yog F46, F3, F2, thiab lwm yam. Fluorine lined valve yog hom valve feem ntau siv hauv kev lag luam, nws tseem muaj ntau yam kev faib tawm, fluorine lined valve hauv ob sab phlu khoom raws li cov kav dej sib txawv ntawm cov khoom siv valve (anticorrosive khoom), cia peb qhia nws kom meej rau koj. Corrosion resistance fluorine lining valve installation thiab txij nkawm ntawm fluorine hauv ob sab phlu valve yog dab tsi cov ntaub ntawv 1, polyene txoj kab uas hla PO Siv nruab nrab: ntau ntau cov kua qaub thiab alkali ntsev thiab ib co organic solvents. Ua haujlwm kub: -58-80 ℃. Nta: Nws yog ib qho zoo tshaj plaws anticorROsive khoom nyob rau hauv lub ntiaj teb no. Nws tau dav siv nyob rau hauv ob sab phlu ntawm cov khoom loj thiab cov yeeb nkab qhov chaw. 2, polyperfluoroethylene propylene FEP (F46) Siv nruab nrab: txhua yam organic hnyav, dilute los yog concentrated inorganic acid, alkali, thiab lwm yam., kub: -50-120 degrees Celsius. Nta: MECHANICAL, ELECTRICAL PROPERTIES THIAB CHEMICAL STABILITY yog qhov zoo ib yam li F4, tab sis cov txiaj ntsig zoo tshaj yog qhov muaj zog dynamic, huab cua zoo heev thiab hluav taws xob. 3. Polytrifluoride PCTEF(F3) Siv tau nruab nrab: ntau yam organic solvents, inorganic corrosion kua (oxidizing acid), kub: -195-120 degrees Celsius. Nta: Thaum tshav kub kub tsis kam, hluav taws xob khoom thiab tshuaj lom neeg stability yog qis dua F4, txhua yam muaj zog, hardness zoo dua F4. 4, PTFE(F4) Siv tau nruab nrab: muaj zog acid, muaj zog puag, muaj zog oxidant, thiab lwm yam. Siv kub -50-150 degrees Celsius. Nta: Cov tshuaj lom neeg ruaj khov zoo heev, kub kub ua haujlwm, tiv thaiv txias, tsis tshua muaj kev sib txhuam coefficient, yog cov khoom siv zoo rau tus kheej lubricating, tab sis tsis tshua muaj neeg kho tshuab, tsis muaj dej tsis zoo, thermal expansion loj. 5. Polypropylene RPP Siv nruab nrab: aqueous tov ntawm inorganic ntsev, dilute los yog concentrated melting kua ntawm inorganic acids thiab alkalis. Ua haujlwm kub: -14-80 ℃. Nta: Ib qho ntawm lub teeb plastics rau nws cov txiaj ntsig. Tensile thiab compressive zog, hardness yog zoo heev nrog tsis tshua muaj siab polyethylene, muaj ib tug zoo heev rigidity; Kev ua haujlwm kub zoo, yooj yim molding, tom qab kev hloov kho ntawm qhov zoo tshaj plaws pheej yig, lub motility, fluidity thiab elastic modulus ntawm dabtsi yog khoov yog txhim kho. 6, polyvinylidene fluoride PVDF (F2) Qhov nruab nrab tsim nyog: Resistant mus rau feem ntau cov tshuaj thiab cov kuab tshuaj. Siv qhov kub thiab txias -70-100 degrees Celsius. Nta: TENSILE HEEV THIAB COMPRESSION zog tshaj F4, khoov tsis kam, huab cua tsis kam, hluav taws xob tsis kam, lub teeb ua haujlwm thiab kev laus, thiab lwm yam, yog tus yam ntxwv zoo toughness, yooj yim molding.