Monga valve yogwiritsidwa ntchito kwambiri, ndivalavu ya mpirandiyenso mtundu wa valve kwambiri.Mitundu yosiyanasiyana imakumana ndi zomwe wogwiritsa ntchito akugwiritsa ntchito munthawi zosiyanasiyana zapakatikati, malo osiyanasiyana a kutentha ndi zofunikira zosiyanasiyana pamachitidwe enieni.Zotsatirazi zikuwonetsa mawonekedwe a ma valve angapo odziwika bwino monga ma valve oyandama, ma valve okhazikika, ma eccentric theka la mpira, ma valve opangidwa ndi V ndi ma valve opangidwa ndi fluorine.
Malinga ndi kapangidwe ndi ntchito, akhoza kugawidwa mu:
1. Pali mitundu ingapo ya mavavu a mpira.Ndi chiyanimavavu a mpira oyandama: Ma valve oyandama a mpira amagwiritsidwa ntchito ngati zisindikizo ndipo mpira ukuyandama.Imagwiritsa ntchito kukakamiza kwa sing'anga kukankhira mpira kuti usunthe mtunda ndikufinya mpando wa valve zotanuka kuti ukwaniritse kusindikiza.Valavu yoyandama yamtunduwu imakhala ndi kukana kwakukulu kotsegulira ndipo ndiyoyenera mapaipi ndi zida zokhala ndi DN "200 komanso kupanikizika kwa PN "100.Ngati m'mimba mwake wa mpirawo ndi waukulu kwambiri, umapindika thupi la valve ndikulephera kupanikizika ndi sing'anga;ngati kupanikizika kuli kwakukulu kwambiri, valavu ya mpira idzaphwanyidwa ndi elastically ndipo mpando wa valve elastic udzakhala wopunduka kosatha, zomwe zingawononge chisindikizo ndi kukhudza valavu ya mpira.moyo.
2. Valavu yokhazikika ya mpira imakonzedwanso ndi tsinde lapamwamba ndi lapansi.Mpando wa valve uli ndi kasupe wa masamba kapena kasupe wa cylindrical spiral.Zikakhala ndi zida, kasupe wa mpando wa valve umaponderezedwa kuti apange mphamvu yowonjezereka kuti akwaniritse chisindikizo choyamba cha valve, ndipo kupanikizika kumakankhidwa panthawi yogwiritsira ntchito.Mpando wa valve umasunthira ku mpira kuti ukwaniritse chisindikizo.Chifukwa mpira susuntha, umatchedwa valavu yokhazikika.Kukonzekera kotereku ndikodalirika kuposa ma valve oyandama a mpira chifukwa cha kudalirika kwake kosindikiza.Ikhoza kugwiritsidwa ntchito mumtundu wambiri, osati kokha kwazing'ono zochepetsera zochepa, komanso zothamanga kwambiri.Koma mapangidwe ake ndi ovuta kwambiri
, Mtengo wamtengo wapatali, posankha, muyenera kusankha malinga ndi zosowa zenizeni.
3. Eccentric hemispherical valve.Vavu yamtundu wotereyi imakhala ndi mawonekedwe owoneka bwino.Kapangidwe kake ndi kofanana ndi kavalo wagulugufe wamitundu yambiri wosanjikiza katatu.Mpando wa valve ndi mpira sizivala ndipo zimakhala ndi ntchito yosindikiza yolimba.Mpira ndi 1/4 yokha ya valve wamba ya mpira.Ili ndi malo opindika, kulemera kwake komanso mtengo wotsika.Izi zimakhala ndi zometa ndipo zitha kugwiritsidwa ntchito papaipi yapakatikati yokhala ndi ulusi wautali popanda kupanikizana.
4. Flange ya valavu ya mpira wotsekemera ndi imodzi kapena ziwiri zazikulu kuposa valavu ya mpira wa flange.Imatengera thupi la valve yofunikira komanso kapangidwe ka mpira wokwera.Chovala chachitsulo chimawotchedwa pakati pa ma flanges okulitsa kunja kwa thupi la valve.Komanso amatchedwa jekete mpira valve.Mawonekedwe a jekete amayikidwa mbali zonse za thupi la valve, zomwe zimatha kutenthedwa ndi nthunzi kapena mpweya wina wotenthedwa kuti uteteze sing'anga kuti isasunthike kapena crystallization kutentha.Ma valve otenthetsera mpira amagwiritsidwa ntchito makamaka m'mapaipi ndi zida zomwe zimakhala zosavuta kuwunikira komanso zimafuna kutchinjiriza kwamafuta mumafuta, mankhwala, zitsulo, ndi machitidwe azamankhwala.
5. Valovu ya mpira wofanana ndi V ndi valavu yoyendetsera mpira.Bowo loyenda la mpirawo ndi losiyana kwambiri ndi bowo lowongoka la valavu ya mpira wamba.Mpirawo uli ndi mawonekedwe a V ndipo nthawi zambiri umatenga mawonekedwe osakhazikika okhala ndi mapesi awiri apamwamba ndi apansi.
6. Fluorine-mizere mpira valavu amagwiritsidwa ntchito kwambiri kutentha otsika ndi amphamvu zikuwononga sing'anga zida mapaipi.Vavu yamtundu wotereyi imakhala ndi mapulasitiki osagwirizana ndi dzimbiri monga PFA kapena FEP m'malo onse a njira yolumikizira yomwe imalumikizana ndi sing'anga.Itha kulowa m'malo mwachitsulo chosapanga dzimbiri chamtengo wapatali ndi Hastelloy ngati sichidutsa kutentha kwautumiki wa rabara ya fluorine mupaipi yotsika kwambiri., Monel alloy, No. 20 alloy, kuthetsa vuto la kunyamula zinthu zowonongeka kwambiri mu petrochemical ndi chemical pipelines