Pem Hauv Ntej Seal Gate Valve

Khoom piav qhia:

Microfiber braided hlua

Nqe: Tus nqi hloov pauv vim yog cov lus qhia tshwj xeeb, tus nqi khoom siv thiab tus nqi pauv. Thov muab koj cov ntaub ntawv tiv tauj rau kuv, Kuv yuav hloov kho tus nqi tshiab tshaj rau koj

Taw qhia rau Bellow Sealed li qub

Bellows seal valves yog siv rau hauv cov ntawv thov uas qhov kev nruj nruj yog qhov tseem ceeb txhawm rau tiv thaiv kom tsis txhob muaj cov dej ntws tawm mus rau hauv qhov chaw, qhov twg cov kua dej tshwj xeeb yog qhov txaus ntshai (tshuaj lom, txhoj puab heev, xov tooj cua). SUNAWE VALVES tshwj xeeb hauv cov rooj vag li qub nrog cov ntsaws ntsaws ntsaws ruaj ruaj, tshwj xeeb hauv kev tsim khoom ntawm:

Valves of large diameter (eg. 48"gate) normally for low pressure applications (typically class 300 ANSI)

Valves of medium-small diameter (eg from 1/2" to 12") normally for high pressure applications (class 600, 900, 1500, 2500 ANSI)

Nyob rau hauv ob qho tib si kev tsim kho ntawm lub tshuab nqus tsev thiab nws cov khoom sib dhos rau lwm cov khoom ntawm lub valve yog qhov tseem ceeb, tshwj xeeb tshaj yog rau kev ua haujlwm ntawm lub tshuab nqus tsev twj tso kua mis uas raug rau cov dej ua haujlwm siab ntawm sab nraud.

Cov ntaub ntawv siv yog txhua qib ib txwm xav tau los ntawm ntau yam kev pabcuam: cam khwb cia lossis forged carbon steel, qis alloy steel, austenitic steel (AISI 316L, AISI 321) lossis npib tsib xee alloys (INCONEL 600, INCONEL 718). Bellows yog hydroformed rau cov duab. Cov ntaub ntawv hauv qab feem ntau yog AISI 316L, INCONEL 625, INCONEL 718). SUNAWE VALVES bellows foob li qub yog ib txwm muab nrog cov txheej txheem ntim khoom (stem packing) rau kev nyab xeeb thib ob foob.

SUNAWE VALVES bellows foob li qub kuj tau sim hauv -lub tsev rau kev khiav tawm. Tus qauv xeem yog ISO 15848 uas yuav tsum tau lub valve kom siab nrog helium roj. Lub rooj vag valve yog pressurized ntawm txog 150 Bar. Piv txwv li, lub valve yog qhib -kaw cycled ntawm chav tsev kub 250 zaug tag nrho thiab 250 zaug tag nrho ntawm 400 degree . Helium leakages raug kuaj pom nrog ib qho tsim nyog helium gas leak detector hu ua sniffer.

Cov dej xau raug tshuaj xyuas ntawm lub cev -tobonnet sib koom ntawm cov kav xwm txheej xwm txheej ceev. Kev kuaj cov txheej txheem ntim khoom yog ua los ntawm kev tsim lub tshuab nqus tsev nyob ib puag ncig. Tus nqi ntws tawm tsawg dua 10 ntawm qhov rho tawm rau qhov ntsuas ntsuas rau kev ntim khoom thiab 50 feem ntawm ib lab rau lub cev rau kev sib koom ua ke. Qhov kev ntsuam xyuas tsim nyog hauv qab foob lub rooj vag li qub nrog kev tsim kho zoo sib xws rau txhua chav kawm siab hauv qab qhov kev sim thiab qia qhov ntev uas tsis tsawg tshaj li ib nrab lossis siab dua ob ntawm lub valve kuaj.

Leakage at various points in pipelines found in chemical plants creates emissions. All such leakage points can be detected using various methods and instruments and should be noted by the plant engineer. Critical leakage points include flanged gasket joints and the Valve / pump gland packing, etc. Today the chemical process industry is gearing itself towards safer technology for better environmental protection and it has become every process engineer's responsibility to design plants that limit damage to the environment through the prevention of leakage of any toxic chemicals.

Cov dej ntws los ntawm lub caj pas Valve lossis lub thawv ntim khoom yog ib txwm muaj kev txhawj xeeb rau kev saib xyuas lossis cov kws ua haujlwm cog. Qhov kev xau no txhais tau tias:

a) Kev poob ntawm cov khoom b) muaj kuab paug rau cov huab cua c) txaus ntshai rau cov neeg ua haujlwm cog.

For example, take the case of a steam leakage through the Valve gland. At 150 PSI, a clearance of just 0.001" through the gland will mean a leak at the rate of 25 lb/hour. This equates to a loss of USD 1.2 per eight hour shift, or USD 1,100 per year. Similarly, a tiny drop of 0.4 mm diameter per second results in a waste of about 200 litres per year of costly oil or solvent. This leakage can be reduced considerably by using the bellow seal Valve. This article will now consider the construction and operation of the bellow seal.

Hauv qab kev tsim kho

Lub hauv qab cartridge yog welded rau ob lub Valve Bonnet thiab Valve qia. Cov kab hauv qab no muaj ntau qhov kev sib txuas thiab cov kev sib txuas no ua compressed lossis nthuav dav nyob ntawm qhov txav ntawm Valve qia. (Kev tshawb fawb hais tias lub hauv qab tau compressed thaum lub Valve nyob rau hauv txoj hauj lwm qhib thiab nthuav dav thaum lub Valve nyob rau hauv qhov chaw kaw). Nws yog ib qho tseem ceeb rau nruab lub Valve lub cev kom zoo. Lub hauv qab tuaj yeem raug kaw rau Valves hauv ob txoj kev sib txawv. Ua ntej, lub hauv qab tuaj yeem welded rau Valve qia nyob rau sab saum toj thiab Valve lub cev hauv qab. Nyob rau hauv cov ntaub ntawv no cov txheej txheem kua yog muaj nyob rau hauv lub hauv qab los yog nyob rau hauv thib ob txoj kev lub hauv qab yog welded mus rau lub Valve qia nyob rau hauv qab thiab lub cev nyob rau sab saum toj. Nyob rau hauv rooj plaub no cov txheej txheem cov kua dej muaj nyob rau hauv cheeb tsam annular ntawm Valve Bonnet thiab hauv qab (los ntawm sab nraud).

Lub hauv qab yog ib qho tseem ceeb tivthaiv thiab tsim lub plawv ntawm lub hauv qab foob li qub. Txhawm rau kom tsis txhob muaj kev sib tw ntawm lub hauv qab lub Valve yuav tsum muaj lub qia nrog txoj kab txav xwb. Qhov no tuaj yeem ua tiav los ntawm kev siv lub tes tsho - txiv ntseej ntawm lub Yoke ntawm Valve Bonnet. Lub handwheel yog haum rau lub tes tsho- txiv ntseej uas ua tau zoo hloov cov lus tsa suab ntawm lub tes tuav mus rau hauv cov lus tsa suab hauv lub Valve qia.

Hauv qab hom

Muaj ob hom kev hauv qab: Forged Bellow thiab Welded Bellow. Tsim - hom bellows yog tsim los ntawm dov ib daim ntawv tiaj tus (nyias phab ntsa ntawv ci) rau hauv ib lub raj uas yog ces longitudinally fusion welded. Cov raj no tom qab mechanically los yog hydrostatically tsim rau hauv lub hauv qab nrog sib npaug thiab dav spaced folds. Cov nplooj welded hauv qab no yog tsim los ntawm vuam tshuab ntxhua khaub ncaws- zoo li cov hlau nyias ua ke ntawm ob sab hauv thiab sab nraud ntawm lub tshuab ntxhua khaub ncaws - zoo li daim hlau. Ib lub welded nplooj hauv qab muaj ntau folds ib chav tsev ntev li piv rau forged bellows. Yog li, rau tib lub stroke ntev, forged bellows yog ob mus rau peb zaug ntev dua lawv cov nplooj welded counterparts.

Tshaj tawm, mechanically forged bellows poob ntawm qhov chaw tsis sib xws, thaum cov nplooj welded feem ntau ua tsis tiav ntawm lossis ze ntawm lub vuam. Txhawm rau kom nkag siab tag nrho ntawm cov hauv qab kawg thiab qhov kawg coller welding nws yog ib advisable mus fabricate siv micro plasma vuam.

Hauv qab tsim

Qhov ntau-ply hauv qab tsim yog nyiam rau tuav cov kua dej siab dua (feem ntau yog ob lossis peb lub plies ntawm phab ntsa hlau). Ob lub ply hauv qab tuaj yeem ua rau nws qhov ntsuas siab los ntawm 80 feem pua ​​​​rau 100 feem pua ​​​​piv rau ib qho ply hauv qab ntawm tib lub thickness. Xwb, yog siv ib qho ply hauv qab ntawm ib lub thickness sib npaug rau qhov ntsuas siab ntawm ob lub ply hauv qab yog siv, qhov ntev ntawm cov hlab ntsha raug txo. Yog li, ntau -ply hauv qab tsim muaj qhov zoo sib xws ntawm ib qho ply hauv qab. Nws yog qhov tseeb tias cov hauv qab no raug rau cov hlau qaug zog thiab qhov qaug zog no tuaj yeem ua rau cov vuam tsis ua haujlwm. Lub neej qaug zog hauv qab no cuam tshuam los ntawm cov khoom siv ntawm kev tsim kho, kev tsim cov txheej txheem, kev mob stroke ntev thiab stroke zaus, ntxiv rau qhov tsis xws li cov dej kub thiab siab.

Cov ntaub ntawv hauv qab no

Qhov nrov tshaj plaws stainless hlau hauv qab cov khoom yog AISI 316Ti uas muaj titanium kom tiv taus qhov kub thiab txias. Xwb, Inconel 600 los yog Inconel 625 txhim kho qaug zog thiab corrosion kuj zoo li piv nrog stainless hlau bellows. Ib yam li ntawd, Hastalloy C-276 muaj kev tiv thaiv corrosion ntau dua thiab qaug zog ntau dua li Inconel 625. Kev qaug zog tuaj yeem txhim kho los ntawm kev siv lub tshuab ua kom sib npaug thiab txo qhov ntev ntawm cov hlab ntsha; qhov no tuaj yeem ua rau kom muaj kev pabcuam hauv qab no.

Valve xaiv

Cov hom Valve feem ntau yuav tsum tau haum nrog cov ntsaws ruaj ruaj hauv qab yog lub rooj vag thiab lub ntiaj teb tsim (saib daim duab 1).Cov no yog qhov tsim nyog rau kev siv nrog cov hauv qab vim lawv cov kev tsim kho sab hauv thiab axial txav ntawm Valve qia.

Raws li cov ntaub ntawv muaj, nws zoo nkaus li tias tam sim no hauv qab foob Valves loj ntawm 3 hli NB txog 650 hli NB. Kev ntsuas siab muaj nyob rau hauv los ntawm ANSI 150 txog 2500. Cov khoom siv rau cov Valves muaj xws li carbon steel, stainless hlau thiab txawv alloys.

Daim ntawv thov

Thaum tshav kub kub hloov xov xwm: roj kub yog feem ntau siv nyob rau hauv kev lag luam xws li hluavtaws fibers / POY (Ib nrab Oriented Yarn). Txawm li cas los xij, ib txwm muaj kev pheej hmoo ntawm hluav taws kub vim cov roj kub nchuav ntawm cov tshuaj lom neeg heev. Ntawm no, hauv qab foob Valves tuaj yeem nres qhov xau.

Lub tshuab nqus tsev / lub tshuab nqus tsev siab siab: qee qhov kev siv yuav tsum tau lub tshuab nqus tsev twj tso kua mis txuas ntxiv kom tshem tawm cov huab cua los ntawm cov kav dej. Txhua lub Valves uas tau teeb tsa rau ntawm lub raj xa dej tuaj yeem tso cai rau huab cua sab nraud nkag mus rau hauv cov raj xa dej mus rau lub thawv ntim khoom. Li no lub hauv qab foob Valve yog tib txoj kev los tiv thaiv huab cua los ntawm lub thawv ntim khoom.

Cov kua dej txaus ntshai heev: rau kev tshaj tawm xws li tshuaj chlorine (saib daim duab 2), hydrogen, ammonia thiab phosgene, lub hauv qab foob Valve yog ib qho zoo tshaj plaws tsim raws li xau los ntawm lub caj pas yog tshem tawm tag nrho.

Nuclear cog, cog dej hnyav: nyob rau hauv cov xwm txheej uas yuav tsum tau tiv thaiv hluav taws xob txhua lub sijhawm, lub hauv qab foob Valve yog qhov kev xaiv kawg.

Cov kua dej kim heev: hauv qee qhov kev siv cov dej xau yuav tsum zam kom yooj yim vim tias cov kua dej ntau heev. Ntawm no, kev ntsuam xyuas nyiaj txiag feem ntau nyiam siv cov foob pob valve.

Environmental Standards: Nyob ib ncig ntawm lub ntiaj teb no, cov qauv hais txog emissions thiab ib puag ncig yog tau nruj dua nyob rau hauv ib hnub. Yog li ntawd nws tuaj yeem nyuaj rau cov tuam txhab kom nthuav dav hauv thaj chaw uas twb muaj lawm. Nrog kev siv lub hauv qab foob li qub, kev nthuav dav yam tsis muaj kev puas tsuaj ib puag ncig ntxiv.

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Cim npe nrov: suab foob ​​ rooj vag valve