Yuav ua li cas xaiv lub valve hluav taws xob actuator valve cov khoom tshiab tsim cov tswv yim thev naus laus zis

Yuav ua li cas xaiv lub valve hluav taws xob actuator valve tshiab cov khoom tsim cov tswv yim ua ntej, xaiv lub tshuab hluav taws xob raws li lub valve hom 1. Angular stroke hluav taws xob actuator (Lub kaum ntse ntse 360 ​​degrees) yog tsim rau npauj npaim valve, pob valve, ntsaws valve, thiab lwm yam. Kev sib hloov ntawm cov zis ncej ntawm lub tshuab hluav taws xob yog tsawg tshaj li ib lub lim tiam, uas yog, tsawg dua 360 degrees, feem ntau 90 degrees kom paub txog kev tswj lub valve qhib thiab kaw txheej txheem. Hom hluav taws xob actuator no tuaj yeem muab faib ua hom kev sib txuas ncaj qha thiab lub hauv paus crank hom raws li qhov sib txawv installation interface hom. A) Kev sib txuas ncaj qha: nws hais txog daim ntawv ntawm kev sib txuas ncaj qha ntawm cov khoom tso tawm ntawm lub tshuab hluav taws xob thiab lub valve qia. B) Base crank hom: hais txog daim ntawv ntawm cov zis ncej txuas nrog lub valve qia los ntawm crank. 2. Multi-tig hluav taws xob actuator (tso lub kaum sab xis 360 degrees) yog tsim rau lub rooj vag valve, lub ntiaj teb valve, thiab lwm yam. Qhov kev sib hloov ntawm cov zis ncej ntawm cov hluav taws xob actuator yog ntau tshaj ib lub lim tiam, uas yog, ntau dua 360 degrees. Feem ntau, ntau tshaj ib qho kev tig yog xav tau kom paub txog kev tswj lub valve qhib thiab kaw txheej txheem. 3. Ncaj nraim (txoj kev ncaj nraim) yog tsim rau ib lub rooj zaum regulating valve, ob chav rooj regulating valve, thiab lwm yam. 2. Txiav txim siab hom kev tswj ntawm cov hluav taws xob actuator raws li cov txheej txheem ntau lawm tswj cov cai 1. Hloov hom (open-loop control) Hloov hom hluav taws xob actuators feem ntau paub qhov qhib lossis kaw tswj ntawm lub valve. Lub valve yog nyob rau hauv txoj hauj lwm qhib tag nrho los yog nyob rau hauv qhov chaw kaw tag nrho. Hom valve no tsis tas yuav tswj tau qhov nruab nrab ntws. Nws yog tshwj xeeb tshaj yog tsim nyog hais tias kev hloov hluav taws xob actuators tuaj yeem muab faib ua cov qauv sib cais thiab kev sib xyaw ua ke vim muaj cov qauv sib txawv. Qhov no yuav tsum tau piav qhia thaum xaiv hom, txwv tsis pub nws feem ntau tshwm sim hauv kev teeb tsa thiab kev tswj hwm qhov system *** thiab lwm yam tsis sib xws. A) Split structure (feem ntau hu ua hom hom): lub chaw tswj tau sib cais los ntawm cov hluav taws xob actuator. Lub tshuab hluav taws xob tsis tuaj yeem tswj lub valve ib leeg. Ib chav tswj sab nraud yuav tsum tau ua kom paub txog kev tswj hwm. Qhov tsis zoo ntawm cov qauv no tsis yooj yim rau kev txhim kho tag nrho cov kab ke, nce cov kab hluav taws xob thiab kev teeb tsa tus nqi, thiab ua rau tsis ua haujlwm, thaum qhov kev ua txhaum tshwm sim tsis yooj yim rau kev kuaj xyuas thiab kev saib xyuas, kev siv nyiaj tsis zoo yog qhov tsis zoo. B) Integrated qauv (feem ntau hu ua ib hom): chav tswj thiab hluav taws xob actuator tau ntim rau hauv ib qho, uas tuaj yeem ua haujlwm hauv qhov chaw tsis muaj kev tswj hwm sab nraud, thiab tuaj yeem ua haujlwm nyob deb tsuas yog los ntawm cov ntaub ntawv tswj xyuas. Qhov zoo ntawm cov qauv no yog ib qho yooj yim rau nruab tag nrho cov kab ke, txo cov kab hluav taws xob thiab kev teeb tsa, yooj yim rau kev kuaj xyuas thiab teeb meem. Tab sis cov khoom lag luam kev sib xyaw ua ke kuj muaj ntau yam tsis zoo, yog li cov khoom siv hluav taws xob ntse yog tsim. 2. Regulating type (kaw-loop control) Lub regulating hluav taws xob actuator tsis muaj kev ua haujlwm ntawm kev hloov hom kev sib xyaw ua ke, tab sis kuj tuaj yeem tswj lub valve thiab kho qhov nruab nrab ntws. A) Hom tswj teeb liab (tam sim no thiab voltage). Kev tswj cov teeb liab ntawm tus tswj hluav taws xob actuator feem ntau suav nrog cov teeb liab tam sim no (4 ~ 20mA, 0 ~ 10mA) lossis voltage teeb liab (0 ~ 5V, 1 ~ 5V). Hom thiab qhov tsis zoo ntawm lub teeb liab tswj yuav tsum tau teev thaum xaiv hom. B) Daim ntawv ua haujlwm (hluav taws xob qhib hom thiab hom hluav taws xob kaw), hom kev ua haujlwm ntawm kev tswj hluav taws xob hluav taws xob feem ntau yog siv hluav taws xob qhib (siv 4 ~ 20mA tswj raws li piv txwv, hluav taws xob qhib hom hais txog 4mA teeb liab sib haum rau lub valve. kaw, 20mA sib haum rau lub valve qhib), thiab lwm yam yog hluav taws xob kaw hom (coj 4-20MA tswj raws li piv txwv, hluav taws xob qhib hom hais txog 4mA teeb liab sib xws rau lub valve qhib, 20mA sib haum rau lub valve kaw). C) Poob kev tiv thaiv teeb liab. Poob ntawm kev tiv thaiv teeb liab hais txog tias thaum tswj cov teeb liab ploj vim kab tsis raug, lub hluav taws xob actuator yuav qhib thiab kaw qhov tswj valve rau cov nqi tiv thaiv. Tus nqi tiv thaiv feem ntau yog qhib tag nrho, kaw tag nrho thiab nyob rau hauv qhov chaw. Peb, raws li kev siv ib puag ncig thiab tawg-pov thawj qib kev faib tawm ntawm cov khoom siv hluav taws xob Raws li kev siv ib puag ncig thiab qib kev tawg-pov thawj, lub valve hluav taws xob tuaj yeem muab faib ua hom zoo tib yam, hom sab nraum zoov, hom flameproof, sab nraum zoov flameproof hom. , thiab lwm yam. 4. Txiav txim siab qhov tso zis torque ntawm hluav taws xob actuator raws li lub torque yuav tsum tau los ntawm lub valve Valve qhib thiab kaw qhov yuav tsum tau torque txiav txim siab qhov tso zis torque ntawm hluav taws xob actuator xaiv yuav ua li cas, feem ntau yog muab tso rau pem hauv ntej los ntawm tus neeg siv lossis los ntawm kev sib txuam valve. chaw tsim tshuaj paus, raws li lub chaw tsim tshuaj paus actuator tsuas yog lub luag hauj lwm rau lub tso zis torque ntawm actuators, ib txwm valve qhib thiab kaw qhov yuav tsum tau torque yog txiav txim los ntawm lub valve txoj kab uas hla thiab ua hauj lwm siab, tab sis vim hais tias ntawm lub valve chaw tsim tshuaj paus ua precision, txheej txheem sib dhos, Yog li ntawd, lub torque yuav tsum tau los ntawm li qub ntawm tib specification uas tsim los ntawm txawv manufacturers kuj txawv, txawm lub torque ntawm li qub ntawm tib specification uas ua los ntawm tib lub valve chaw tsim tshuaj paus kuj txawv. Thaum xaiv hom, qhov kev xaiv torque ntawm tus actuator me dhau, nws yuav tsis tuaj yeem qhib thiab kaw lub valve ib txwm, yog li lub tshuab hluav taws xob yuav tsum xaiv qhov tsim nyog torque ntau. Tsib, lub hauv paus rau kev xaiv kom raug ntawm cov khoom siv hluav taws xob valve: Kev khiav hauj lwm TORQUE: LUB ROOJ HAUJ LWM YOG LUB PARAMETER UAS YUAV TSUM TAU TXAIS LUB VALVE ELECTRIC ntaus ntawv. Cov zis torque ntawm lub tshuab hluav taws xob yuav tsum yog 1.2 ~ 1.5 npaug ntawm lub valve ua haujlwm torque. Kev khiav hauj lwm thrust: muaj ob yam ntawm lub ntsiab cav qauv ntawm valve hluav taws xob ntaus ntawv: ib tug tsis configured nrog thrust disc, ncaj qha tso zis torque; Lwm qhov yog los teeb tsa lub thrust disc, thiab cov zis torque hloov mus rau qhov tso zis tawm los ntawm lub valve qia txiv ntoo ntawm lub thrust disc. Tus naj npawb ntawm kev sib hloov ntawm cov zis ncej ntawm lub valve hluav taws xob ntaus ntawv: tus naj npawb ntawm kev sib hloov ntawm cov zis ncej ntawm lub valve muaj feem xyuam rau lub nominal txoj kab uas hla ntawm lub valve, qia suab thiab tus xov tooj ntawm lub taub hau, uas yuav tsum tau. xam raws li M = H / ZS (M yog tag nrho cov kev hloov pauv uas cov cuab yeej hluav taws xob yuav tsum tau ntsib, H yog qhov qhib qhov siab ntawm lub valve, S yog cov ntsia hlau pitch ntawm qia tsav, thiab Z yog cov xov tooj lub taub hau ntawm lub valve qia). Qeb DIAMETER: RAU MULTI-TWS QHOV TSEEB VALVES, AC ELECTRIC VALVE tsis tuaj yeem sib sau yog tias cov kab loj loj uas tau tso cai los ntawm cov khoom siv hluav taws xob tsis dhau los ntawm cov qia ntawm cov khoom siv valve. Yog li ntawd, sab hauv txoj kab uas hla ntawm lub hollow tso zis ncej ntawm lub tshuab hluav taws xob yuav tsum ntau dua li sab nraud txoj kab uas hla ntawm lub qia ntawm qhib-qhib valve. Rau ib feem ntawm lub teb valve thiab multi-rotary valve nyob rau hauv lub maub qws valve, txawm hais tias tsis xav txog txoj kab uas hla ntawm lub valve qia los ntawm qhov teeb meem, tab sis nyob rau hauv kev sib piv yuav tsum tau tag nrho xav txog lub cheeb ntawm lub valve qia thiab qhov luaj li cas ntawm lub valve. keyway, kom lub rooj sib txoos tuaj yeem ua haujlwm ib txwm. Cov zis ceev: Yog tias qhov qhib thiab kaw ceev ntawm lub valve nrawm dhau, nws yooj yim los tsim cov dej rauj tshwm sim. Yog li ntawd, qhov tsim nyog qhib thiab kaw ceev yuav tsum raug xaiv raws li qhov sib txawv ntawm kev siv. Valve cov khoom siv tshiab tsim cov tswv yim Valve yog siv nyob rau hauv tag nrho cov teb ntawm lub teb chaws kev khwv nyiaj txiag thiab tib neeg txoj kev noj qab haus huv, vim hais tias kom haum raws li cov kev cai ntawm txawv kev ua hauj lwm tej yam kev mob, yog li nws muaj ntau ntau yam. Peb lub teb chaws valve manufacturing kev lag luam yog loj heev, valve manufacturers muaj ntau txhiab tus, thoob plaws lub teb chaws. Peb lub teb chaws tau dhau los ua ib lub ntiaj teb valve tso tawm thiab kev lag luam xav tau lub teb chaws uas loj. Tab sis feem ntau ntawm Tuam Tshoj lub valve kev lag luam rau cov lag luam me thiab nruab nrab, qhov zoo thiab qhov tsis zoo yog intermingled, txhua xyoo tso zis tus nqi tshaj ib puas lab yuan peb, txawm piv rau lwm yam domestic machinery kev lag luam, ob qho tib si nyob rau hauv cov khoom thiab technology theem thiab muaj ib tug qhov sib txawv loj, tiag tiag muaj cov khoom lag luam kev tshawb fawb thiab kev tsim kho lub peev xwm ntawm chav tsev yog tsawg heev, yog li ntawd nyob rau hauv lub loj petrochemical, nuclear fais fab nroj tsuag, roj thiab roj nyob deb deb pipeline thiab lwm yam loj tej yaam num, txhawb li qub yog mas imported tam sim no. Tam sim no, valve tuam txhab muab qhov tseem ceeb rau kev tsim cov khoom tshiab. Nws yuav tsum tau muab sau tseg tias lub valve kev lag luam nyob rau hauv peb lub teb chaws tsim mus rau , txawm hais tias qhov sib txawv nrog cov thoob ntiaj teb advanced theem tseem muaj, tab sis nws tau dhau mus dhau theem ntawm kev luam thiab nqus. Txhawm rau nrhiav txoj hauv kev ntawm kev txhim kho ntxiv, peb yuav tsum txheeb xyuas thiab xav txog qhov sib txawv ntawm kev siv tshuab valve thiab kev txhim kho cov khoom lag luam los ntawm qib sib sib zog nqus, thiab siv zog los tsim cov khoom tshiab nrog kev ywj pheej ntawm cov cuab yeej cuab tam. Ua ntej, tib neeg-oriented, tsim kom muaj lub tswv yim ntawm humanized khoom tsim Feem ntau peb feem ntau yog xam nyob rau hauv cov khoom tsim yog nws cov khoom, qauv, mechanical zog, kev ua tau zoo, kev pab cuam lub neej thiab lwm yam, nyob rau hauv kev ntsuam xyuas ntawm qhov zoo ntawm lub valve, dav dav kuj yog siv cov ntsuas no. Nrog txoj kev loj hlob ntawm Lub Sijhawm thiab kev vam meej ntawm tib neeg, lub tswv yim ntawm tib neeg-taw qhia tau nkag mus rau txhua qhov chaw ntawm kev sib raug zoo lub neej. Peb tuaj yeem hnov ​​​​qhov kev hloov pauv no los ntawm vaj tse, tsheb, khoos phis tawj, xov tooj ntawm tes, khaub ncaws thiab ntau qhov chaw pej xeem. Lawv los ntawm kev nyab xeeb, kev nplij siab, kev txuag hluav taws xob, kev tiv thaiv ib puag ncig, tshiab, zoo nkauj thiab ntau lwm yam hauv txhua yam kom xav txog cov neeg siv khoom xav, xav txog kev saib xyuas rau tib neeg. Obviously, humanized tsim yuav tsum tsis txhob nyob rau hauv qeb ntawm cov neeg siv khoom, li qub, raws li ib yam ntawm cov loj kom muaj nuj nqis dav, siv nyob rau hauv kev lag luam, kev ua liaj ua teb, * * * * * thiab yog ze ze rau tib neeg lub neej txhua hnub ua hauj lwm ntawm txhua yam khoom, thiab. tsis tuaj yeem txwv tsis pub dhau lub tswv yim tsim qauv thiab tsim qauv, thiab yuav tsum tshawb xyuas cov tswv yim tshiab thiab txhaj cov tswv yim tshiab. Thaum peb txheeb xyuas cov khoom lag luam txawv teb chaws, ntxiv rau cov kev ntsuas kev ua tau zoo, peb yuav pom nws cov duab zoo nkauj, cov qauv muag, cov kab noj hniav huv, cov ntsiab lus zoo. Piv txwv li, txhawm rau tiv thaiv kev kis kab mob thib ob, txawm tias lub qhov dej ntws tsis siv cov asbestos-muaj sealing packing thiab gaskets. Tsis tas li ntawd, txhawm rau kom tsis txhob muaj tus neeg teb xov tooj txhais tes raug khawb, qhov txuas txuas kawg ntawm flange tau ua tiav rau hauv qhov chaw nkhaus thiab lwm yam. Qhov sib txawv ntawm cov ntsiab lus tshwj xeeb no yuav tsum ua rau peb xav tob ntxiv: vim li cas nws thiaj xav ua li ntawd? Yuav ua li cas nws txawm xav tias ua li ntawd? Cov ntsiab lus yuav tsum boil mus rau humanized tsim lub tswv yim, nce los ntawm theem ntawm kev nkag siab, yuav ua rau peb cov khoom tsim yog tsis nyob rau hauv thawj theem, qhov yooj yim tab sis los ntawm kev xav ntawm txiv neej-tshuab engineering, los ntawm kev nyab xeeb dua, txhim khu kev qha, kev txuag hluav taws xob, kev tiv thaiv ib puag ncig, kev tsim khoom huv si, kev ua haujlwm yooj yim thiab yooj yim, yooj yim disassembling txij nkawm kom delve rau ntau yam, xws li kev xav, Endows lub valve no cov khoom ib txwm muaj nrog lub tswv yim tshiab thiab cov duab, tsim cov yam ntxwv ntawm tus kheej. 2. Ua tib zoo saib xyuas cov khoom siv science, thiab siv cov ntaub ntawv tshiab, cov thev naus laus zis tshiab thiab cov txheej txheem tshiab rau cov khoom siv valve kom raws sijhawm Nrog kev nce qib ntawm cov cuab yeej siv, kev tsim khoom hauv qhov kub thiab txias, qhov kub thiab txias, siab nqus, corrosive. , radioactive, lom, flammable thiab explosive nce contour tsis ntawm cov complex ua hauj lwm tej yam kev mob, yog li lub valve siv cov kev ua ntawm kev ruaj ntseg, kev cia siab rau thiab kev pab cuam lub neej, thiab lwm yam, muab tso rau pem hauv ntej lub siab dua thiab ntau stringent yuav tsum, yog li txoj kev loj hlob yoog mus rau cov kev ua haujlwm ntawm siab parameter ntawm txhua yam li qub, Lawm, nws tau dhau los ua ib qho kev txhawj xeeb ntawm kev lag luam valve, engineering tsim department thiab cov neeg siv, thiab lub ntsiab technical obstacles los daws qhov teeb meem yog feem ntau cov khoom. Cov ntaub ntawv tshawb fawb tau suav tias yog ib qho kev qhuab qhia zoo hauv lub xyoo pua tshiab. Nyob rau hauv xyoo tas los no, ntau cov ntaub ntawv ua tau zoo tshiab tau tshwm sim, xws li ntau yam nanomaterials, superconducting cov ntaub ntawv, cov khoom siv, organic synthetic thiab polymer cov ntaub ntawv, inorganic nonmetallic cov ntaub ntawv thiab ntau yam ntaub ntawv sib xyaw. Nyob rau tib lub sij hawm ntau casting, vuam, tshuaj tsuag vuam, txau, sib xyaw, sintering thiab lwm yam kev sib sau thiab nto kho cov cuab yeej tshiab thiab cov cuab yeej siv tshuab tshiab. Ua tib zoo mloog cov ntaub ntawv, tiam sis thiab kev ua tiav ntawm cov khoom siv engineering tshawb fawb thiab kev tsim kho, thiab siv lawv rau cov khoom siv valve hauv lub sijhawm yog ib txoj hauv kev tseem ceeb hauv kev tsim cov kev ua haujlwm siab thiab siab tsis zoo li qub. Tshwj xeeb, nws tsim nyog hais tias cov khoom siv ceramics yog thawj cov khoom siv tsis yog xim hlau, siv rau hauv qhov kub thiab txias, tiv thaiv corrosion thiab yaig tsis kam valve qhov chaw, feem ntau ua tiav cov txiaj ntsig zoo. 3. Kev sib koom ua ke ntawm cov ntaub ntawv thev naus laus zis thiab kev txawj ntse thev naus laus zis rau hauv li qub thiab paub txog kev sib koom ua ke yog txoj hauv kev tshiab ntawm kev tsim kho thev naus laus zis Hauv lub sijhawm qub, kev loj hlob sai ntawm cov ntaub ntawv thev naus laus zis, cov ntaub ntawv thiab kev txawj ntse tau hloov pauv lub ntsej muag ntawm kev lag luam thiab kev ua liaj ua teb thiab tib neeg lub neej kev sib raug zoo. . Valve raws li lub davhlau ya nyob twg actuators los tswj cov kua dej nyob rau hauv cov yeeb nkab, yog hais tias muaj peev xwm niaj hnub xam tshuab, sensor technology, network thiab tej thaj chaw deb tswj technology thiab ntse technology rau hauv lub valve cov khoom, lub valve yuav endowed nrog tshiab tswvyim, yog kiag li txawv los ntawm lub cov khoom qub yog tsim los ntawm cov qauv tshiab thiab kev ua haujlwm ntawm cov khoom siv valve hloov kho. Nyob rau hauv xyoo tas los no, lub regulator, kev ruaj ntseg valve, siab txo valve, ntxiab thiab lwm yam khoom tau pib qhia cov cim. Xws li lub caij nplooj ntoos hlav kev nyab xeeb valve yog * * * * * siv lub valve nyem, tab sis raws li cov khoom siv ntawm cov khoom loj thiab siab, qhov no hom nyem valve ntawm cov qauv loj thiab kev ntseeg siab yog qhov nyuaj kom ua tau raws li qhov yuav tsum tau ua ntawm ntau lawm, Yog hais tias lub pob nyem valve siab sensor tau nruab rau hauv kev tswj valve ceev qhib thiab kaw, lub valve yuav yog hom hom tshiab. Thiab xws li cov cuab yeej cuab tam tam sim no ntawm ntau, nws txoj haujlwm ua haujlwm yog siv chav dej thiab condensed dej kub, qhov ntom ntom, ntws tus nqi sib txawv, los ntawm cov txheej txheem nyuaj kom paub txog lub valve qhib thiab kaw, ua kom tiav cov dej ntws tawm. Ib hom kev ntxiab tshiab yuav tsum tuaj yeem txheeb xyuas cov khoom siv roj-kua thiab cov li qub tsim rau hauv ib qho, tswj kev qhib thiab kaw ntawm lub valve, raws li lub tswv yim no ntawm kev tsim cov cuab yeej tshiab, tau tshaj tawm txawv teb chaws. Plaub, nthuav dav lub zeem muag, tsim kom muaj lub tswv yim ntawm qhov project loj, paub txog cov txheej txheem ntawm cov khoom siv loj ua tiav, txhim kho cov cuab yeej siv siab thiab siab ntxiv tus nqi ntawm cov khoom valve zoo tshaj plaws raws li cov khoom txhawb nqa hauv cov khoom siv hauv kev lag luam, lub valve plays lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev nyab xeeb thiab kev ua haujlwm ntawm tus txheej txheem. Txoj kev loj hlob ntawm cov khoom tshiab valve tsis tuaj yeem sib cais los ntawm cov khoom siv sib txuas thiab cov txheej txheem ntau lawm. Nyob rau hauv txoj kev loj hlob sai ntawm kev tshawb fawb thiab thev naus laus zis, kev tsim cov khoom lag luam tshiab, thev naus laus zis tshiab, cov txheej txheem tshiab, cov cuab yeej tshiab txuas ntxiv mus, kom lub valve sib xws hauv kev ua haujlwm, qauv, cov khoom siv kuj tso tawm cov kev xav tau tshiab raws li. Nws yog lub ntsiab lus tseem ceeb rau kev tsim cov khoom tshiab los tsim txhua yam kev hloov kho li qub rau cov kev lag luam tshwj xeeb thiab cov txheej txheem thev naus laus zis, thiab nws tseem yog qhov xav tau ceev ceev rau thaj chaw ntawm cov cuab yeej siv loj thiab cov cuab yeej siv, xws li nuclear fais fab li qub, roj thiab gas long-destance pipeline li qub, thee chemical slurry li qub, thiab lwm yam. Txog rau qhov kawg no, kom muaj lub tswv yim ntawm ib qhov project loj, nrog rau ob peb tus qauv tsim, ntawm lub valve valve tsis zoo, kom muaj lub tswv yim ntawm tag nrho qhov project. thiab ua tiav cov khoom siv, nkag siab txog nws cov txheej txheem tsim khoom, ib puag ncig tsim khoom, kev ua haujlwm thiab cov kev qhia tshwj xeeb, ntawm lub hauv paus, Tsuas yog hauv txoj kev no peb tuaj yeem xeeb tub, tsim thiab tsim cov khoom tsim kom tau raws li qhov xav tau ntawm qhov project, ib yam li cov neeg sau ntawv. muaj peev xwm tsim tej hauj lwm zoo tsuas yog thaum lawv nkag mus tob rau hauv lub neej. Lub valve pawg yog ntau yam, ntau txhiab qhov sib txawv, kev lag luam xav tau hloov pauv tas li, lub valve chaw tsim khoom tsim cov nplai thiab cov txheej txheem tsis sib xws, tab sis cov khoom siv valve hauv kev txhim kho dav dav thiab kev txhim kho ntawm txoj kev muaj ntau yam sib xws. . Yog tias lub tuam txhab valve tuaj yeem ua ke lawv tus kheej cov xwm txheej, thiab txiav txim siab txoj kev txhim kho lub hom phiaj ntawm lawv cov khoom tshiab raws li kev tshawb fawb thiab kev ua haujlwm, lawv yuav siv sij hawm tsawg dua, txhawb kev lag luam valve hauv peb lub teb chaws kom txhim kho tsis tu ncua thiab noj qab nyob zoo.