Methapo ea ho phalla le li-valve ke tse ling tsa lisebelisoa tse sebelisoang haholo. Hangata flowmeter le valve li kenngoa ka letoto holim'a phala e le 'ngoe,' me sebaka se pakeng tsa tse peli se ka fapana, empa potso eo hangata baqapi ba lokelang ho sebetsana le eona ke hore na flowmeter e ka pele kapa ka morao ea valve.
Ka kakaretso, re khothaletsa hore meter ea phallo e kenngoe ka pel'a valve ea taolo. Lebaka ke hore ha valve ea taolo e laola phallo, ho ke ke ha qojoa hore ka linako tse ling tekanyo ea ho bula e nyenyane kapa e koetsoe kaofela, e leng ho tla baka habonolo khatello e mpe phaepheng ea tekanyo ea flowmeter. Haeba khatello e mpe ea pipeline e fihla sebakeng se itseng, ho bonolo ho etsa hore lesela la pipeline le theohe. Ka hona, ka kakaretso re etsa tlhahlobo e ntle ho latela litlhoko tsa lipeipi le litlhoko tsa setšeng nakong ea ho kenya bakeng sa ho kenya le ho sebelisoa hamolemo.
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