Kusankha mipando yoyenera kungakhale chisankho chovuta pankhani ya mavavu a mpira chifukwa mudzakhala ndi zosankha zingapo. Kusankha zinthu zomwe muyenera kuziganizira zikuphatikizapo zipangizo zomwe zimagwiritsidwa ntchito pomanga, kukula koyenera, ndi mtundu wa mapangidwe apangidwe kuphatikizapo V-port, bleed, double bock, 1, 2, kapena 3 zidutswa, ndi zina zotero. Kuganiziranso kofunika kwambiri ndi mtundu wa mpando.
Kukhala ndi chidziwitso chokwanira cha zochitika za ndondomekoyi kuyenera kukhala poyambira posankha ma valve okhala. Kodi vuto lanu limafuna kutsekeka kwa thovu? Kodi madziwa akuwononga? Kodi ili ndi tinthu zotupa? Kodi idzakhala pansi pa kuthamanga kwambiri kapena kutentha? Mukamvetsetsa mozama pazifukwa izi, kusankha kudzawonekera.
.Metal Seated Ball Valves
Ubwino wofunikira wa ma valve okhala ndi zitsulo poyerekeza ndi ma valve okhala ndi zofewa ndikuti amatha kupirira kutentha kwambiri komanso zovuta zautumiki. Mipando yachitsulo imatha kupirira kung'anima kwambiri, kugwedezeka kwa hydraulic, abrasive process fluid, ndi kutentha kwambiri mpaka kupitirira 1,000 ° F. Imakhalanso yabwino kwambiri pakukokoloka kwapamwamba kapena ntchito zowononga. Chinthu chinanso chofunika ndi chakuti mipando yachitsulo imatha kuumitsidwa ndi zokutira zapadera.
.Mavavu Ofewa Okhala Mpira
Mipando yofewa nthawi zambiri imakhala ndi zigawo za thermoplastic monga PTFE. Mavavuwa ndi oyenerera kugwiritsa ntchito komwe kumagwirizana ndi mankhwala ndikofunikira, komanso munthawi yomwe kukhala ndi chisindikizo cholimba kwambiri ndikofunikira. Zipando zofewa, komabe, sizoyenera kukonza zamadzimadzi zonyansa kapena zonyansa. Ma valve awa amadziwika kuti amasweka pansi pazifukwa ngati izi, zomwe zimapangitsa kuti valavu ikhale yotayirira. Zovuta zomwe zimayambitsidwa ndi ma valve okhala ndi zofewa zimayenderana ndi zomwe sizikugwirizana ndi mapulogalamu omwe amatsutsa malire awo a ntchito. Mipira yokhala ndi zitsulo zokhala ndi zitsulo kumbali ina imatha kupirira kutentha kwambiri komanso ntchito zambiri. Kukhazikika bwino m'munda, zitsulo zokhala ndi mavavu a mpira zimapereka ntchito yosasokonezedwa ndi miyezo yotseka kwambiri. Ma valve amagwiranso ntchito kwa nthawi yayitali kuposa ma valve okhala pansi. Mavavu olimba awa amatha kugwira ntchito zambiri zowononga.
Kuyika
Kuyika kwa mavavu okhala ndizitsulo kumatha kutsata miyezo yotseka yomwe ikuphatikiza ANSI/FCI 70-2-1976 ndipo idapangidwira kuti itayike. Magulu omwe amatchulidwa pafupipafupi amaphatikizapo Gulu V ndi VI. Kalasi ya VI nthawi zambiri imatanthauziridwa molakwika ngati "kutchinga kuwira." M'malo mwake, kutayikira kwina kumaloledwa, kuyezedwa ndi kuchuluka kwa thovu la mpweya lomwe limatuluka pamphindi imodzi pakuyesedwa. Kutseka kwa "bubble tight" kumagwirizana molondola ndi ma valve okhala ndi mphamvu.
Nthawi yotumiza: Sep-08-2022