Vavu ya mpira ndi gawo lofunikira pamapaipi aliwonse, omwe amapereka njira yosavuta komanso yothandiza yowongolera kutuluka kwa zakumwa ndi mpweya.Pakati pa mitundu yosiyanasiyana ya ma valves a mpira omwe alipo, ma valve awiri a mpira ndi otchuka chifukwa cha kusinthasintha kwawo komanso kudalirika.M'nkhaniyi, tiwona momwe ma valve a mpira amagwiritsidwira ntchito, nthawi yogwiritsira ntchito valavu yamagulu awiri, komanso ubwino wosankha njira yabwino kwambiri kuchokera kwa ogulitsa odziwika bwino a mpira.
Kodi valavu ya mpira ndi chiyani?
Cholinga chachikulu cha ma valve a mpira ndikuwongolera kutuluka kwa madzi mu mapaipi.Imakhala ndi diski yozungulira (kapena mpira) yokhala ndi dzenje pakati, yomwe imatha kutembenuzidwa kuti ilole kapena kuletsa kuyenda kwa media.Pamene avalavu ya mpiraali pamalo otseguka, dzenje limagwirizana ndi chitoliro, kulola kuti media idutse.Ikakhala pamalo otsekedwa, dzenjelo ndi perpendicular kwa chitoliro, kutsekereza otaya.
Ma valve a mpira amagwiritsidwa ntchito m'mafakitale osiyanasiyana, kuphatikizapo mafuta ndi gasi, petrochemicals, madzi ndi madzi owonongeka, kupanga magetsi, ndi zina.Amayamikiridwa chifukwa cha kuthekera kwawo kutseka mwachangu komanso modalirika, komanso kuthekera kwawo kulimbana ndi zovuta komanso kutentha kwambiri.
Ndiyenera kugwiritsa ntchito liti valavu yamagulu awiri?
A valavu yamitundu iwirindi mtundu wapadera wa valavu ya mpira yomwe imakhala ndi magawo awiri osiyana, thupi ndi kapu yomaliza.Mapangidwe awa ndi osavuta kusamalira ndi kukonzanso popeza valavu imatha kupasuka popanda kuichotsa ku chitoliro.Ndi abwino kwa mapulogalamu omwe amafunikira kukonza nthawi zonse kapena kuyang'anitsitsa, ndi machitidwe omwe angafunikire kusinthidwa kapena kusinthidwa mtsogolo.
Valavu yokhala ndi magawo awiri opangidwa ndi CEPAI imagwiritsidwa ntchito kwambiri kudula kapena kulumikiza sing'anga mupaipi.Itha kugwiritsidwa ntchito m'madzi, nthunzi, mafuta, gasi wamadzimadzi, gasi, gasi, malasha, nitric acid, urea ndi media zina.Izi zimapangitsa kukhala chisankho chosunthika pazinthu zosiyanasiyana zamafakitale zomwe zingafunike kuwongolera mitundu yosiyanasiyana ya media.Kuonjezera apo, mapangidwe a trunnion amatsimikizira kukhazikika kwakukulu ndi kuthandizira kwa mpira, kulola kupanikizika kwakukulu ndi kukula kwake.
Kusankha woperekera valavu yoyenera ndikofunikira kuti mutsimikizire mtundu wa valve ndi magwiridwe antchito.Otsatsa odziwika ngati CEPAI amapereka zosankha zingapo kuti zigwirizane ndi zofunikira zosiyanasiyana ndipo zinthu zawo zimapangidwa motsatira miyezo yapadziko lonse lapansi kuti zitsimikizire kudalirika komanso kulimba.
Pomaliza, mavavu a mpira amagwira ntchito yofunika kwambiri pakuwongolera kayendedwe ka madzi m'mapaipi, ndipo mavavu amitundu iwiri ndi njira yosunthika komanso yothandiza pamagwiritsidwe ambiri.Ndichisankho chodziwika m'mafakitale ambiri chifukwa chosavuta kukonza ndikukonza komanso kukwanitsa kuthana ndi ma voltages osiyanasiyana apakati komanso apamwamba.Posankha valavu ya mpira wamagulu awiri, ndikofunika kulingalira zofunikira zenizeni za dongosololi ndikusankha wothandizira wodalirika kuti atsimikizire ubwino ndi ntchito ya valve.
Nthawi yotumiza: Jan-18-2024