Npauj npaim valve ua haujlwm li cas?

Npauj npaim valveyog ib hom valve uas siv lub disc qhib thiab kaw ib feem los sib pauv li 90 ° los qhib, kaw lossis kho qhov ntws ntawm qhov nruab nrab. Butterfly valve tsis yog tsuas yog muaj cov qauv yooj yim, me me, lub teeb yuag, siv cov khoom siv tsawg, qhov loj me me, lub zog tsav me me, kev ua haujlwm yooj yim thiab ceev, tab sis kuj muaj kev tswj hwm ntws zoo thiab kaw cov yam ntxwv kaw, thiab yog ib qho ntawm cov valve loj hlob sai tshaj plaws hauv kaum xyoo dhau los. Butterfly valves tau siv dav. Qhov ntau thiab tsawg ntawm nws siv txuas ntxiv nthuav dav, thiab txhim kho mus rau qhov kub thiab txias, siab siab, txoj kab uas hla loj, nruj siab, lub neej ntev, cov yam ntxwv tswj hwm zoo heev, thiab ntau yam haujlwm ntawm ib lub valve. Nws qhov kev ntseeg tau thiab lwm yam ntsuas kev ua tau zoo tau mus txog qib siab.

Nrog rau kev siv cov roj hmab hluavtaws uas tiv taus tshuaj lom neeg los uanpauj npaim li qub, kev ua tau zoo ntawmnpauj npaim li qubtau zoo dua. Vim tias cov roj hmab hluavtaws muaj cov yam ntxwv ntawm kev tiv thaiv corrosion, tiv thaiv kev yaig, kev ruaj khov ntawm qhov ntev, kev ywj pheej zoo, yooj yim tsim, tus nqi qis, thiab lwm yam, cov roj hmab hluavtaws nrog cov khoom sib txawv tuaj yeem xaiv raws li kev siv sib txawv kom tau raws li cov xwm txheej ua haujlwm ntawmnpauj npaim li qub.

Vim tias polytetrafluoroethylene (PTFE) muaj zog tiv taus corrosion, kev ua haujlwm ruaj khov, tsis yooj yim rau kev laus, coefficient qis ntawm kev sib txhuam, yooj yim rau kev tsim, kev ruaj khov ntawm qhov ntev, thiab tuaj yeem txhim kho nws cov khoom siv dav dav los ntawm kev sau thiab ntxiv cov ntaub ntawv tsim nyog, cov khoom siv foob pob hluav taws valve nrog lub zog zoo dua thiab coefficient qis dua tuaj yeem tau txais, thiab cov kev txwv ntawm cov roj hmab hluavtaws raug kov yeej, yog li cov khoom siv polymer polymeric sawv cev los ntawm PTFE thiab nws cov khoom hloov kho tau siv dav hauv lub valve npauj npaim, yog li qhov kev ua tau zoo ntawm lub valve npauj npaim tau txhim kho ntxiv.Npauj npaim li qubnrog rau ntau yam kub thiab siab, kev ua haujlwm sealing txhim khu kev qha thiab lub neej ntev dua tau tsim tawm.

Yuav kom ua tau raws li qhov xav tau ntawm kev siv hauv kev lag luam xws li kub thiab qis, muaj zog yaig, thiab lub neej ntev, cov hlau foob npauj npaim valve tau tsim kho zoo heev. Nrog rau kev siv cov khoom siv tiv taus kub thiab qis, tiv taus kub thiab qis, muaj zog tiv taus corrosion, muaj zog yaig, thiab cov khoom siv alloy muaj zog hauv npauj npaim valve, cov hlau kaw npauj npaim valve tau siv dav hauv kev lag luam xws li kub thiab qis, muaj zog yaig, thiab lub neej ntev, thiab npauj npaim valve nrog lub cheeb loj (9 ~ 750mm), siab siab (42.0MPa) thiab ntau qhov kub thiab txias (-196 ~ 606 ° C) tau tshwm sim, yog li cov thev naus laus zis ntawm npauj npaim valve tau mus txog qib tshiab.

Thaum lub qhov valve qhib tag, nws muaj qhov tsis kam me me rau kev ntws. Thaum qhov qhib nyob nruab nrab ntawm 15 ° ~ 70 °, nws tuaj yeem siv rau kev tswj kev ntws rhiab heev, yog li kev siv lub qhov valve npauj npaim yog qhov tshwm sim ntau heev hauv kev kho qhov loj.

Vim yog lub phaj ntawm lub valve uas so tau yooj yim, feem ntau cov valve uas muaj cov khoom seem yuav siv tau rau cov khoom uas muaj cov khoom seem. Nyob ntawm seb lub foob puas muaj zog, nws kuj siv tau rau cov khoom uas muaj hmoov thiab cov khoom me me.

Cov qhov dej npauj npaim yog qhov tsim nyog rau kev tswj cov dej ntws. Vim tias qhov poob siab ntawm lub qhov dej npauj npaim hauv cov yeeb nkab loj heev, kwv yees li peb npaug ntawm lub qhov rooj vag, thaum xaiv lub qhov dej npauj npaim, yuav tsum xav txog qhov cuam tshuam ntawm qhov poob siab ntawm lub kaw lus kav dej, thiab lub zog ntawm lub phaj npauj npaim los dais qhov siab ntawm cov kav dej thaum nws kaw kuj yuav tsum xav txog. Tsis tas li ntawd, qhov txwv ntawm qhov kub ua haujlwm uas cov khoom siv rooj zaum elastomeric tuaj yeem raug rau ntawm qhov kub siab kuj yuav tsum tau coj mus rau hauv tus account.

Lub valve npauj npaim muaj qhov ntev me me thiab qhov siab tag nrho, qhib thiab kaw sai, thiab tswj cov kua dej zoo. Lub hauv paus ntsiab lus ntawm cov valve npauj npaim yog qhov tsim nyog tshaj plaws rau kev ua cov valve loj. Thaum xav tau siv lub valve npauj npaim los tswj qhov ntws, nws yog ib qho tseem ceeb uas yuav tsum xaiv qhov loj me thiab hom valve npauj npaim kom nws ua haujlwm tau zoo thiab ua haujlwm tau zoo.

Feem ntau, nyob rau hauv qhov throttling, kev tswj hwm thiab av nkos nruab nrab, qhov ntev ntawm cov qauv luv luv, qhov qhib thiab kaw ceev ceev, thiab qhov txiav siab qis (qhov sib txawv me me) yog qhov xav tau, thiab lub valve npauj npaim raug pom zoo. Cov valve npauj npaim tuaj yeem siv thaum muaj ob txoj haujlwm hloov kho, txoj kab uas hla tsawg dua, suab nrov qis, cavitation thiab vaporization, me ntsis ntawm kev xau mus rau hauv huab cua, thiab cov khoom siv abrasive. Nyob rau hauv cov xwm txheej ua haujlwm tshwj xeeb, kev hloov kho throttling, lossis kev sib khi nruj, hnav hnyav, kub qis (cryogenic) thiab lwm yam xwm txheej ua haujlwm.