Kev Taw Qhia
Kev xaiv cov khoom siv rau lub foob pob hluav taws xob uas tiv taus xeb tsis yog hais txog kev nrhiav ib qho kev xaiv "zoo tshaj plaws", tab sis hais txog kev sib phim lub ntsej muag foob pob, elastomers, thiab cov khoom hlau rau cov kua dej, kub, siab, thiab kev ua haujlwm. Kev sib xyaw ua ke tsis raug tuaj yeem ua rau hnav sai dua, ua rau muaj kev tawm tsam tshuaj lom neeg, thiab ua rau lub neej foob pob luv dua, ua rau muaj kev xau, lub sijhawm tsis ua haujlwm, thiab kev pheej hmoo kev nyab xeeb. Tsab xov xwm no piav qhia txog kev xaiv cov khoom siv xws li silicon carbide, tungsten carbide, Hastelloy, PTFE, thiab cov elastomers tshwj xeeb ua haujlwm li cas hauv kev pabcuam corrosive, thiab yuav ua li cas soj ntsuam lawv raws li cov txheej txheem chemistry kom koj tuaj yeem txheeb xyuas qhov kev tsim foob pob tsim nyog tshaj plaws rau koj daim ntawv thov.
Vim Li Cas Kev Xaiv Khoom Siv Tseem Ceeb Rau Cov Khoom Siv Mechanical Seals Uas Tiv Thaiv Kev Kub Ntxhov
Qhia meej txog ib qholub foob pob hluav taws xob uas tiv taus xebyog ib qho ntawm cov kev txiav txim siab tseem ceeb tshaj plaws hauv kev tswj cov kua dej.Cov ntsaws ruaj ruaj ua haujlwm ua qhov thaiv tseem ceebntawm cov kua dej ua haujlwm hnyav thiab ib puag ncig sab nraud, tiv thaiv cov pa phem thiab tiv thaiv cov khoom siv sab hauv ntawm lub twj tso kua mis. Thaum ua cov khoom siv corrosive heev - xws li cov kua qaub muaj zog, cov alkalis caustic, lossis cov kuab tshuaj hnyav - qhov sib txawv ntawm qhov yuam kev tsis muaj. Kev puas tsuaj ntawm cov khoom siv tuaj yeem tshwm sim sai, ua rau poob ntawm kev tswj hwm, kev phom sij rau ib puag ncig, thiab kev puas tsuaj loj heev rau cov khoom siv.
Cov txheej txheem xaiv yuav tsum muaj kev nkag siab txog metallurgy, tribology, thiab elastomer chemistry. Lub foob pob hluav taws xob tsis yog ib qho khoom monolithic; nws yog kev sib dhos ntawm cov ntsej muag tig thiab ruaj khov, cov khoom sib khi thib ob, thiab cov khoom siv hlau. Txhua yam ntawm cov khoom no yuav tsum tiv taus cov tshuaj lom neeg ib puag ncig thaum tswj hwm kev kam rau siab ntawm cov khoom siv hauv qab ntau yam kev ntxhov siab thiab kub. Yog tias tsis phim cov khoom siv kom raug rau cov kua dej tshwj xeeb, nws yuav txo qhov nruab nrab ntawm lub sijhawm ua tsis tiav (MTBF) thiab ua rau muaj kev pheej hmoo ua haujlwm ntau ntxiv.
Cov txheej txheem tshuaj lom neeg, kev pheej hmoo ntawm kev xau, thiab kev cuam tshuam rau lub sijhawm tsis ua haujlwm
Cov txheej txheem tshuaj lom neeg qhia txog qhov nrawm thiab cov txheej txheem ntawm kev puas tsuaj ntawm cov khoom. Cov kua dej hauv kev lag luam tuaj yeem ua rau muaj cov pH siab heev, xws li cov kua qaub ntau heev (pH < 1) mus rau cov kua qaub ntau heev (pH > 13), txhua tus tawm tsam cov khoom sib txawv. Piv txwv li, cov kua qaub oxidizing xws li nitric acid tuaj yeem ua rau cov hlau tsis xeb tsis zoo tab sis sai sai rhuav tshem cov pa roj carbon txheem. Ntxiv mus, cov pa phem me me, uas feem ntau tsis quav ntsej hauv cov lus qhia ntawm cov kua dej ntau, tuaj yeem ua haujlwm ua cov tshuaj catalysts rau cov txheej txheem xeb hauv zos xws li xeb pitting lossis crevice.
Qhov kev pheej hmoo ntawm kev xau uas cuam tshuam nrog kev xaiv cov khoom siv tsis raug txuas ntxiv mus rau qhov tsis ua haujlwm yooj yim. Hauv kev ua tshuaj lom neeg thiab kev ua kom huv petrochemical, cov tshuaj lom neeg volatile organic (VOCs) thiab cov pa phem yuav tsum raug tswj hwm nruj me ntsis. Cov cai ntawm Lub Chaw Tiv Thaiv Ib Puag Ncig (EPA) feem ntau yuam kom cov pa phem ntawm lub twj tso kua mis tseem nyob hauv qab 500 feem ib lab (ppm) qhov txwv. Kev tawg ntawm lub ntsej muag foob lossis kev puas tsuaj ntawm elastomer tuaj yeem ua rau muaj kev ua txhaum cai tam sim ntawd, yuav tsum tau kaw thaum muaj xwm txheej ceev thiab ua rau muaj kev tshaj tawm ib puag ncig yuav tsum tau ua.
Cov nqi tsis ua haujlwm txuas nrog kev sib raug zoo ntawm cov khoom siv tsis zoo
Cov teeb meem nyiaj txiag ntawm cov khoom siv tsis sib xws ntau dua li tus nqi yuav khoom thawj zaug ntawm lub foob pob nws tus kheej. Thaum lub foob pob ua tsis tau zoo ua ntej lub sijhawm vim muaj tshuaj lom neeg tawm tsam, cov nqi hloov pauv ncaj qha yuav ntxiv los ntawm cov neeg ua haujlwm uas xav tau rau kev rho tawm lub twj tso kua mis, kev tshem tawm cov pa phem, thiab kev rov nruab dua. Qhov tseem ceeb tshaj, cov nqi tsis ncaj qha uas cuam tshuam nrog lub sijhawm tsis ua haujlwm tsis tau npaj tseg tuaj yeem ua rau muaj kev ntxhov siab heev. Hauv cov chaw ua haujlwm txuas ntxiv uas muaj zog ntau, qhov kev ua tsis tiav ntawm lub twj tso kua mis tsis tau xav txog tuaj yeem ua rau cov kab ntau lawm nres, ua rau muaj cov nqi tsis ua haujlwm txij li $ 10,000 txog ntau dua $ 50,000 ib teev nyob ntawm kev lag luam thiab tus nqi khoom.
Tsis tas li ntawd xwb, qhov xau ntawm cov tshuaj xeb tuaj yeem ua rau cov khoom siv nyob ib puag ncig puas tsuaj. Lub foob uas puas lawm ua rau cov tshuaj lom neeg tawm tsam lub twj tso kua mis, cov kabmob, thiab cov tsev cav. Qhov pib ua qhov foob tsis ua haujlwm hauv zos tuaj yeem ua rau lub twj tso kua mis puas tsuaj loj heev uas yuav tsum tau kho dua tshiab lossis hloov lub ncej. Kev nqis peev rau cov khoom siv tiv taus xeb kom zoo ua ntej - txawm tias nws ua rau tus nqi khoom pib nce ntxiv 200% txog 300% - ua rau muaj qhov rov qab los ntawm kev nqis peev (ROI) ntau dua los ntawm kev ncua MTBF los ntawm ob peb lub hlis mus rau ntau xyoo.
Cov Khoom Siv Xaiv Rau Cov Khoom Siv Kho Kom Zoo Nkauj Uas Tiv Thaiv Kev Kub Ntxhov
Kev tsim lub foob pob hluav taws xob uas tiv taus xeb yuav tsum tau xaiv cov khoom siv tshwj xeeb rau peb thaj chaw sib txawv: lub ntsej muag foob thawj zaug, cov khoom siv hlau (cov springs, drive pins, thiab glands), thiab cov khoom sib khi thib ob (O-rings thiab gaskets). Txhua thaj chaw ntsib kev ntxhov siab ua haujlwm sib txawv, txhais tau tias cov khoom siv uas ua haujlwm zoo heev ua lub nplhaib O-ring zoo li qub yuav tsis haum rau lub ntsej muag foob uas ua haujlwm tau zoo, tsim cua sov.
Cov ntaub ntawv foob xws li silicon carbide
Lub ntsej muag foob tseem ceeb yog cov khoom tseem ceeb tshaj plaws, vim lawv tswj cov kua dej me me thaum tig ib leeg.Silicon carbide (SiC)yog suav hais tias yog cov khoom siv foob zoo tshaj plaws rau kev siv tshuaj lom neeg hnyav. Tshwj xeeb, direct-sintered (alpha) silicon carbide muaj kev tiv thaiv tshuaj lom neeg ze rau thoob plaws hauv pH ntau ntawm 0 txog 14 thiab tuaj yeem tiv taus qhov kub ua haujlwm txog li 300 ° C (572 ° F). Tsis zoo li reaction-bonded silicon carbide, uas muaj silicon dawb uas tuaj yeem leached tawm los ntawm cov caustics muaj zog lossis hydrofluoric acid, alpha-sintered SiC tseem ruaj khov hauv yuav luag txhua qhov xov xwm nruj.
Lwm cov khoom siv ntsej muag muaj xws li tungsten carbide (WC) thiab ntau qib carbon. Tungsten carbide yog cov khoom siv ruaj khov thiab tiv taus kev cuam tshuam, ua rau nws tsim nyog rau cov slurries abrasive, tab sis nws cov tshuaj tiv thaiv yog nyob ntawm nws cov binder. Nickel-bound tungsten carbide feem ntau nyiam dua li cobalt-bound variants hauv corrosive ib puag ncig, txawm hais tias nws tseem tsis tau SiC hauv cov kua qaub muaj zog. Antimony-impregnated lossis resin-impregnated carbon ntsej muag feem ntau siv ua lub nplhaib mating tawm tsam SiC vim lawv cov khoom zoo heev rau tus kheej-lubricating, muab cov kua dej txheej txheem tsis muaj cov neeg sawv cev oxidizing muaj zog uas tawm tsam cov qauv carbon.
Cov hlau thiab cov khoom sib xyaw uas tiv taus xeb
Cov khoom siv hlau ntawm lub foob, suav nrog lub phaj gland, lub tes tsho, thiab cov springs, yuav tsum tiv taus ob qho tib si corrosion thiab kev tawm tsam hauv zos xws li pitting thiab kev ntxhov siab corrosion cracking (SCC). Thaum 316 stainless hlau yog tus qauv kev lag luam rau kev pabcuam dav dav, nws yooj yim rau chloride-induced pitting. Rau cov chaw ua haujlwm hnyav, cov engineers yuav tsum teev cov alloys qib siab dua raws li lawv cov Pitting Resistance Equivalent Number (PREN). PREN saum toj no 40 feem ntau yog qhov yuav tsum tau rau chloride lossis acidic kev pabcuam hnyav.
Hastelloy C-276 (PREN > 45) yog ib qho ntawm cov hlau nickel-molybdenum-chromium uas siv tau ntau yam, muab kev tiv thaiv zoo rau cov roj chlorine ntub, hypochlorites, thiab ntau yam organic thiab inorganic acids. Titanium Qib 2 feem ntau raug xaiv rau cov xov xwm oxidizing thiab cov dej hiav txwv vim nws cov yeeb yaj kiab oxide ruaj khov, tiv thaiv, txawm hais tias nws yooj yim rau chlorine qhuav. Alloy 20 yog lwm qhov kev xaiv uas siv ntau, tsim tshwj xeeb los tiv thaiv kev tawm tsam sulfuric acid ntawm qhov kub thiab txias siab.
Elastomers thiab cov khoom sib khi theem ob
Cov khoom sib khi thib ob, feem ntau yog O-rings, muab qhov sib khi zoo li qub ntawm lub rooj sib dhos sib khi thiab lub twj tso kua mis. Kev xaiv elastomer feem ntau yog qhov txwv tsis pub ua rau lub foob ua haujlwm tshuaj lom neeg thiab thermal. Fluoroelastomers (FKM), feem ntau hu ua Viton, yog tus qauv rau ntau cov kua qaub me me thiab cov kua roj av tab sis lwj sai hauv ketones, amines, thiab alkalis muaj zog.
Rau kev tiv taus xeb heev, perfluoroelastomers (FFKM), xws li Kalrez lossis Chemraz, yog qhov yuav tsum tau muaj. Cov tshuaj FFKM muaj kev tiv taus tshuaj zoo ib yam li PTFE tab sis tswj hwm lub cim xeeb elastic uas tsim nyog rau kev sib khi dynamic. Lawv tuaj yeem tiv taus cov kuab tshuaj hnyav, cov kua qaub muaj zog, thiab cov hauv paus ntawm qhov kub ua haujlwm tas mus li txog 327 ° C (620 ° F). Thaum kev txwv nyiaj txiag tiv thaiv kev siv FFKM tag nrho, PTFE-encapsulated FKM lossis silicone O-rings muab lwm txoj hauv kev pheej yig, muab cov tshuaj inertness ntawm PTFE lub tsho nrog lub zog kho tshuab ntawm lub hauv paus elastomer.
| Hom Elastomer | Max Temp Txuas Ntxiv Mus | Cov Ntaub Ntawv Tiv Thaiv Tshuaj | Tus Nqi Sib Piv |
|---|---|---|---|
| Fluoroelastomer (FKM) | 204°C (400°F) | Zoo rau cov roj, cov kua qaub me me; Tsis zoo rau cov ketones | 1x (Txoj kab pib) |
| EPDM | 150°C (300°F) | Zoo rau cov caustics, dej kub; Tsis zoo rau cov roj | 0.8x |
| PTFE-Encapsulated | 204°C (400°F) | Kev tiv thaiv zoo heev rau txhua yam; Yooj yim rau dej txias | 3x txog 5x |
| FFKM (Perfluoroelastomer) | 327°C (620°F) | Kev tiv thaiv ze rau thoob ntiaj teb; Qhov huv siab tshaj plaws | 15x txog 30x |
Yuav Ua Li Cas Soj Ntsuam Cov Khoom Siv Seal rau Cov Kev Pabcuam
Kev soj ntsuam cov ntaub ntawv foob yuav tsum tau txav mus dhau cov ntawv qhia txog kev sib raug zoo ntawm cov tshuaj lom neeg thiab kev soj ntsuam cov xwm txheej ntawm qhov chaw ua haujlwm. Cov khoom siv uas tsis muaj zog ntawm chav tsev kub yuav raug kev puas tsuaj sai thaum raug cua sov sib txhuam ntawm lub ntsej muag foob lossis thaum cov kua dej hloov pauv thaum lub sijhawm ua haujlwm tsis zoo. Cov kws ua haujlwm yuav tsum soj ntsuam tag nrho cov thermodynamic thiab tshuaj lom neeg ntawm daim ntawv thov.
Cov kev hloov pauv ua haujlwm xws li kev sib xyaw ua ke, chlorides, thiab kub
Kub, kev sib xyaw ua ke, thiab qhov muaj cov ions tshwj xeeb hloov pauv qhov kev xeb sai heev. Piv txwv li, 316 stainless hlau yog qhov zoo tshaj plaws rau cov dej kub ib puag ncig, tab sis yog tias cov chloride concentration ntau tshaj 1000 ppm thiab qhov kub nce siab tshaj 60 ° C (140 ° F), cov khoom siv yuav yooj yim rau kev ntxhov siab corrosion cracking (SCC) thiab pitting sai. Yog li ntawd, cov ntawv thov uas muaj cov dej ntsev kub lossis dej hiav txwv feem ntau xav tau super duplex stainless hlau lossis titanium.
Qhov concentration ntawm cov kua qaub kuj tseem ceeb heev. Cov kua qaub sulfuric qhia txog cov qauv xeb tsis yog kab: cov kua qaub sulfuric dilute yog corrosive heev rau ntau cov hlau, xav tau Hastelloy lossis Alloy 20, thaum cov kua qaub sulfuric concentrated (> 90%) qee zaum tuaj yeem tswj tau los ntawm cov hlau carbon txheem ntawm qhov kub thiab txias vim yog kev tsim cov zaj duab xis sulfate passivating. Txawm li cas los xij, yog tias cov kua qaub concentrated nqus cov dej noo los ntawm huab cua, qhov kev dilution hauv zos yuav pib ua rau muaj kev tawm tsam hnyav rau ntawm cov khoom siv foob.
Kev pauv khoom siv thiab cov yam sib piv
Kev xaiv cov khoom siv zoo tshaj plaws feem ntau yuav tsum tau sib npaug cov khoom siv kho tshuab thiab tshuaj lom neeg sib tw. Txawm hais tias alpha-sintered silicon carbide muab kev tiv thaiv corrosion tsis muaj qhov sib piv, nws yog brittle heev. Yog tias lub twj tso kua mis ntsib cavitation loj heev lossis lub qhov deflection, SiC ntsej muag tuaj yeem tawg ua puas tsuaj loj heev. Hauv cov ntawv thov uas qhov kev poob siab ntawm lub tshuab yog qhov teeb meem tseem ceeb nrog rau kev xeb, cov engineers yuav cuam tshuam los ntawm kev siv lub ntsej muag tungsten carbide uas muaj zog dua, txawm tias tsis tshua muaj tshuaj lom neeg inert.
Kev ua kom sov yog lwm qhov tseem ceeb piv rau. Cov ntsej muag foob tsim cov cua sov sib txhuam loj heev, uas yuav tsum tau muab tso rau hauv cov kua dej kom tiv thaiv cov kua dej kom tsis txhob ci ntsa iab mus ua pa. SiC muaj kev ua kom sov zoo heev, rub cua sov tawm ntawm qhov sib txuas ntawm lub foob sai dua li alumina ceramic lossis carbon. Lub peev xwm no txo qhov kev pheej hmoo ntawm kev poob siab thermal thiab ntev lub neej ntawm cov elastomers theem ob.
| Cov Khoom Siv Ntawm Lub Ntsej Muag | Vickers Hardness (kg/mm²) | Kev Ua Kub (W/m·K) | Kev Tiv Thaiv Kev Xeb | Kev Pheej Hmoo ntawm Kev Nyuaj Siab / Kev Pob Txha |
|---|---|---|---|---|
| Cov pa roj carbon graphite | 150 – 250 | 10 – 15 | Nruab Nrab mus rau Zoo | Qis |
| Tungsten Carbide (Ni binder) | 1400 – 1600 | 80 – 90 | Zoo | Nruab nrab |
| Alpha-Sintered SiC | 2500 – 2800 | 120 – 130 | Zoo heev (Universal) | Siab |
| Alumina Ceramic (99.5%) | 1800 – 2000 | 25 – 35 | Zoo heev | Siab heev |
Thaum ib qho kev txhim kho khoom siv tsis txaus
Hauv qee qhov kev siv hnyav, kev txhim kho cov khoom siv hlau thiab cov ntaub ntawv ntsej muag ntawm ib qho kev foob tsis txaus los lav qhov kev ntseeg tau. Thaum cov kua dej muaj kev phom sij heev, lom, lossis yooj yim polymerizing thaum sib cuag nrog cov pa oxygen hauv huab cua, daim ntawv thov yuav tsum muajob chav mechanical seal kev npajOb lub foob siv ob pawg ntawm lub ntsej muag foob thiab qhia txog cov kua dej thaiv lossis cov roj buffer ntawm lawv.
Raws li American Petroleum Institute (API) cov qauv kav dej, xws li API Plan 53A lossis 54, cov kua dej thaiv uas muaj siab tau ncig ntawm cov foob sab hauv thiab sab nraud. Cov kua dej no raug tswj hwm ntawm qhov siab kwv yees li 10% txog 15% (feem ntau yog 1.5 txog 2.0 bar) siab dua li qhov siab ntawm lub thawv ntim twj. Vim tias cov kua dej thaiv muaj siab dua, txhua qhov xau hla cov foob sab hauv yuav ntws mus rau hauv cov txheej txheem, kom ntseeg tau tias cov kua dej ua haujlwm corrosive yeej tsis kov cov khoom foob sab nraud lossis khiav mus rau hauv huab cua. Txoj kev no tso cai rau cov khoom siv foob sab nraud los ua los ntawm cov khoom siv tus qauv, pheej yig dua.
Cov Yam Ntxim Saib Txog Kev Yuav Khoom Thiab Kev Ua Raws Cai Hauv Kev Xaiv Khoom Siv
Kev yuav cov khoom siv kho tshuab uas tiv taus xeb yuav tsum tau nrhiav kev sib txuas lus nyuaj, tswj lub sijhawm ua cov khoom siv txawv teb chaws ntev, thiab xyuas kom meej tias ua raws li cov qauv kev ua raws li kev lag luam. Kev ua tsis tiav los sau thiab txheeb xyuas cov khoom siv sib xyaw ua ke tuaj yeem ua rau muaj kev ua tsis tiav loj heev thiab muaj kev lav phib xaub loj heev, tshwj xeeb tshaj yog nyob rau hauv cov lag luam uas raug tswj hwm hnyav xws liroj thiab roj av, tshuaj, thiab kev ua tshuaj lom neeg.
Cov Qauv, cov ntaub ntawv pov thawj, thiab kev taug qab tau
Cov ntawv thov uas muaj kev pheej hmoo siab yuav tsum muaj cov ntaub ntawv pov thawj nruj kom paub tseeb tias cov ntaub ntawv teev tseg tau siv rau hauv kev tsim lub foob. Hauv kev lag luam petrochemical, cov foob pob hluav taws xob yuav tsum ua raws li API 682 4th Edition cov qauv, uas hais txog cov khoom siv tshwj xeeb rau ntau yam kev pabcuam. Rau cov ntawv thov uas muaj hydrogen sulfide (H2S), cov khoom siv hlau yuav tsum ua raws li NACE MR0175 / ISO 15156 kom tiv thaiv kev tawg ntawm sulfide.
Yuav kom paub tseeb tias taug qab tau, cov kws ua haujlwm yuav khoom feem ntau xav tau Cov Ntawv Qhia Txog Kev Ntsuas Khoom Siv (MTRs) rau txhua qhov chaw hlau uas ntub dej. Ntxiv mus, cov chaw ua haujlwm yuav ua qhov kev ntsuas Khoom Siv Zoo (PMI) thaum tau txais lub foob. PMI siv cov khoom siv X-ray fluorescence (XRF) los xyuas kom meej tias cov khoom sib xyaw ua ke ntawm cov hlau sib xyaw tsis puas tsuaj, kom ntseeg tau tias tus neeg muag khoom tsis tau hloov 304 stainless hlau rau Hastelloy C-276 uas tau thov.
Kev muaj peev xwm ntawm tus neeg muab khoom thiab kev pheej hmoo ntawm kev nrhiav khoom
Kev nrhiav cov khoom sib xyaw ua ke thiab cov elastomers ua tau zoo muaj kev pheej hmoo.
Yuav Ua Li Cas Xaiv Cov Khoom Siv Zoo Tshaj Plaws
Cov Ntsiab Lus Tseem Ceeb
- Cov lus xaus tseem ceeb tshaj plaws thiab cov laj thawj rau kev foob kho tshuab tiv taus corrosion
- Cov lus qhia tshwj xeeb, kev ua raws li txoj cai, thiab kev kuaj xyuas kev pheej hmoo uas tsim nyog lees paub ua ntej koj cog lus
- Cov kauj ruam tom ntej thiab cov lus ceeb toom uas cov nyeem ntawv tuaj yeem siv tau tam sim ntawd
Cov Lus Nug Feem Ntau
Cov khoom siv foob twg feem ntau zoo tshaj plaws rau lub foob pob hluav taws xob uas tiv taus xeb?
Alpha-sintered silicon carbide feem ntau yog qhov kev xaiv zoo tshaj plaws vim tias nws tswj tau ntau cov kua qaub, alkalis, thiab qhov kub siab zoo dua li cov pa roj carbon txheem.
Thaum twg yuav tsum tsis txhob siv cov tungsten carbide lossis carbon faces?
Tsis txhob siv cov pa roj carbon uas muaj zog heev hauv cov kua uas muaj zog oxidizing lossis cov kua uas muaj zog heev. Siv kev ceev faj nrog tungsten carbide qhov twg muaj peev xwm ua rau muaj kev tawm tsam los ntawm tshuaj lom neeg; xyuas kom meej tias cov kua sib xws ua ntej xaiv.
Puas yog txhua lub ntsej muag foob silicon carbide sib npaug tiv taus corrosion?
Tsis yog. Feem ntau, Alpha-sintered SiC muaj kev tiv taus tshuaj zoo dua li reaction-bonded SiC, tshwj xeeb tshaj yog nyob rau hauv cov tshuaj caustic muaj zog thiab qee cov kev pabcuam tshuaj lom neeg hnyav.
Cov khoom siv foob twg yuav tsum tiv taus xeb ntxiv rau ntawm cov ntsej muag?
Tshawb xyuas cov khoom hlau thiab cov elastomers thiab. Cov Springs, glands, thiab O-rings yuav tsum phim cov kua dej, qhov kub, thiab siab lossis lub foob tuaj yeem ua tsis tau txawm tias muaj cov ntsej muag zoo.
Puas yog Victor Seals pab tau phim cov foob tiv taus xeb rau OEM twj tso kua mis qauv?
Yog. Victor Seals muab cov khoom siv kho tshuab uas siv tau rau OEM thiab hloov tau rau ntau lub twj tso kua mis lag luam, pab cov pab pawg kho kom xaiv cov khoom siv uas tsim nyog rau cov dej num xeb.
Lub sijhawm tshaj tawm: Lub Rau Hli-13-2026