Thaum teeb tsa lossis tswj cov cuab yeej siv roj, lubDaim duab peb sab Check Valveplays lub luag haujlwm tseem ceeb hauv kev ntsuas qhov tseeb thiab kev ncaj ncees ntawm cov kav dej. Cov khoom tshwj xeeb no feem ntau yog ntsia nruab nrab ntawm cov yeeb nkab corrugated nyob rau hauv qab ntawm cov roj dispenser thiab lub ntsiab flange. Nws lub luag haujlwm tseem ceeb yog muab kev sib cais txhim khu kev qha thiab txhim kho kev sib khi ntawm cov roj xa khoom thiab chav dispenser nws tus kheej. Los ntawm kev tiv thaiv huab cua los ntawm kev nkag mus rau hauv lub cev thiab tswj kom ruaj khov ntawm cov roj, nws tshem tawm cov teeb meem tshwm sim ntawm "stant suav", qhov twg lub 'meter' pib khiav sai li sai tau thaum lub nozzle yog lifted, txawm tias ua ntej roj tawm. Thaum lub sij hawm kev teeb tsa, nws yog ib qho tseem ceeb uas yuav tsum tau xyuas tias qhov 68 hli qhov deb ntawm qhov sib haum nrog lub flange kom tsis txhob muaj qhov cuam tshuam uas tuaj yeem ua rau muaj kev phom sij los yog nyiaj txiag poob.
Kev xaiv tooj liab ua cov khoom tseem ceeb rau aDaim duab peb sab Check Valveyog raws li nws cov kev tiv thaiv corrosion zoo heev thiab cov qauv ua haujlwm ruaj khov hauv cov roj- hnyav ib puag ncig. Tsis ntev los no, kev lag luam tau saib xyuas qhov kev hloov pauv ntawm cov nqi lag luam tooj liab, uas cuam tshuam ncaj qha rau cov nqi tsim khoom ntawm cov khoom siv roj av zoo. Tsis zoo li cov khoom siv hluav taws xob pheej yig dua, tooj liab- forged li qub muab kev ua haujlwm ntev tshaj - lub sij hawm sib khi, tshwj xeeb tshaj yog thaum raug kub sab nraum qhov sib txawv. Rau cov neeg saib xyuas cov chaw, ib kauj ruam yooj yim tab sis ua haujlwm tau zoo yog txhawm rau tshuaj xyuas cov li qub rau cov khib nyiab lossis cov cim ntawm kev hnav thaum lub sij hawm niaj hnub twj tso kua mis calibrations. Hloov lub valve degraded tam sim ntawd tuaj yeem tiv thaiv cov teeb meem ntawm huab cua thiab xyuas kom meej tias txhua liter ntawm roj raug suav nrog kom raug, uas thaum kawg tiv thaiv lub koob npe nrov ntawm qhov chaw nres tsheb thiab kev nyiam ntawm cov neeg siv khoom.
