Taboo 21

Malo oyika alibe malo ogwirira ntchito

Miyezo: Ngakhale kukhazikitsa kuli kovuta poyamba, ndikofunikira kuganizira ntchito yayitali ya wogwiritsa ntchito poyikavalavuza ntchito. Kuti mupange kutsegula ndi kutsekavalavumosavuta, m'pofunika kuyika gudumu la valve kuti likhale lofanana ndi chifuwa (nthawi zambiri mamita 1.2 kuchokera pansi pa chipinda chopangira opaleshoni). Pofuna kupewa kugwira ntchito movutikira, gudumu lamanja la valavu yolowera liyenera kuyang'ana mmwamba osati otsetsereka. Mavavu a makina apakhoma ndi zigawo zina ziyenera kupereka malo okwanira kuti woyendetsa ayime. Ndizowopsa kwambiri kugwira ntchito kumwamba, makamaka mukamagwiritsa ntchito acid-base, media wowopsa, ndi zina zambiri.

Taboo 22

Mavavu opangidwa ndi zida zowonongeka

Miyezo: Mukayika ndi kumanga, samalani ndipo pewani kugunda mavavu a brittle-material. Yang'anani valavu, zizindikiro, ndi zitsanzo musanayike, ndipo yang'anani kuwonongeka kulikonse, makamaka pa tsinde la valve. Tsinde la valavu nthawi zambiri limakhala lopindika panthawi yotumiza, choncho tembenuzirani kangapo kuti muwone ngati ili. Yesaninso valavu ya zinyalala zilizonse. Pofuna kupewa kuwononga gudumu lamanja kapena tsinde la valavu pokweza valavu, chingwe chiyenera kumangirizidwa ku flange kusiyana ndi chimodzi mwa zigawozi. Kulumikiza mapaipi a valve kumayenera kutsukidwa. Kuti muchotse tchipisi ta iron oxide, mchenga wamatope, zitsulo zowotcherera, ndi zina, gwiritsani ntchito mpweya woponderezedwa. Tinthu tating'onoting'ono tating'ono, monga kuwotcherera slag, kumatha kutsekereza ma valve ang'onoang'ono ndikupangitsa kuti zisagwire ntchito komanso kukanda mosavuta kusindikiza pamwamba pa valavu. Pofuna kupewa kuchulukira mu valavu ndi kusokoneza kayendedwe ka sing'anga, chosindikizira chosindikizira (chingwe cha hemp kuphatikiza mafuta otsogolera kapena tepi ya PTFE yaiwisi) chiyenera kukulunga pa ulusi wa chitoliro musanamange valavu. Onetsetsani kuti mumangiriza ma bolts mofanana ndi symmetrically pamene mukuyika ma valve a flanged.Kupewa valavu kuti isapangitse kuthamanga kwambiri kapena kusweka, chitoliro cha chitoliro ndi valve flange ziyenera kukhala zofanana ndikukhala ndi chilolezo choyenera. Zida za Brittle ndi ma valve amphamvu otsika zimafunikira chisamaliro chapadera. Mavavu otsekera chitoliro ayenera kukhala owotcherera poyambira, kenako ndikutsegula kwathunthu kwa magawo otseka, ndipo pomaliza, kuwotcherera kwakufa.

Tabu 23

Valavu ilibe kuteteza kutentha ndi njira zotetezera kuzizira

Miyezo: Ma valve ena amafunikiranso kuti azikhala ndi chitetezo chakunja kuti ateteze kutentha ndi kuzizira. Nthawi zina payipi ya nthunzi yotentha imawonjezedwa pagawo lotsekera. Mtundu wa valve womwe uyenera kukhala wotentha kapena wozizira umadalira zofuna za kupanga. Mwachidziwitso, kuteteza kutentha kapena kutsata kutentha kumafunika ngati sing'anga mkati mwa valavu ikazizira kwambiri, zomwe zingachepetse kupanga bwino kapena kuyambitsa valavu kuzizira. Momwemonso, pamene valavu ikuwonekera, yomwe ili yoipa kuti ipangidwe kapena imayambitsa chisanu ndi zochitika zina zosafunika, valve iyenera kukhala yozizira. Zida zoziziritsa kuzizira zimaphatikizapo nkhata, perlite, thovu, pulasitiki, nthaka ya diatomaceous, asibesitosi, ubweya wa slag, ubweya wagalasi, perlite, nthaka ya diatomaceous, etc.

Taboo 24

Steam trap sinayikidwe modutsa

Miyezo: Mavavu ena ali ndi zida ndi zodutsamo kuphatikiza ndi zida zodzitetezera. Pofuna kukonza msampha mosavuta, njira yodutsa yaikidwa. Pali ma valve ambiri oikidwa ndi bypass. Mkhalidwe, kufunikira, ndi zofunikira zopangira vavu zimatsimikizira ngati njira yodutsa iyenera kukhazikitsidwa.

Taboo 25

Kulongedza sikusinthidwa pafupipafupi

Miyezo: Zotengera zina za mavavu omwe ali mgululi ziyenera kusinthidwa chifukwa ndizosagwira ntchito kapena zosagwirizana ndi sing'anga yomwe ikugwiritsidwa ntchito. Bokosi lodzaza nthawi zonse limadzazidwa ndi kulongedza nthawi zonse ndipo valavu imawonekera kwa zikwi zambiri zamitundu yosiyanasiyana, komabe pamene valavu ikugwira ntchito, kulongedza kuyenera kusinthidwa kwa TV. Kanikizani zoyikapo pozungulira mozungulira. Msoko uliwonse wa bwalo uyenera kukhala madigiri 45, ndipo mizere ya mabwalo iyenera kukhala madigiri 180 motalikirana. Gawo la m'munsi la chithokomiro liyenera kuponderezedwa mpaka kuya koyenera kwa chipinda cholongedza, chomwe nthawi zambiri chimakhala 10-20% ya kuya kwathunthu kwa chipindacho. Kutalika kwa kulongedza kwake kuyenera kuganiziridwanso.Makona a msoko wa mavavu okhala ndi mfundo zolimba ndi madigiri 30. Zozungulira zozungulira zimasiyana ndi madigiri 120 kuchokera kwa wina ndi mzake. Zingwe zitatu za rabara za O-rings (rabara yachilengedwe yolimbana ndi alkali yofooka yochepera 60 digiri Celsius, mphira wa nitrile wosamva mafuta osakwana madigiri 80 Celsius, ndi mphira wa fluorine wosamva kuwononga zinthu zosiyanasiyana zowononga zosakwana 150 digiri Celsius) atha kugwiritsidwanso ntchito, kutengera momwe zinthu ziliri. , kuwonjezera pa zodzaza zomwe tatchulazi. mphete za nayiloni (zosamva ammonia ndi alkali pansi pa 120 digiri Celsius), mphete za polytetrafluoroethylene (zosamva zowononga zamphamvu zosakwana 200 digiri Celsius), ndi zodzaza zooneka ngati zina. Manga wosanjikiza wa tepi yaiwisi ya polytetrafluoroethylene kunja kwa zopaka zaasibesito ndi kuchepetsa kuwonongeka kwa tsinde la valve kuchokera ku electrochemical action. Kuti chigawocho chikhale chofanana ndi kuti chisafe kwambiri, sungani tsinde la valve pamene mukukakamiza kulongedza. Osapendekeka pamene mukumangitsa gland ndi kuyesetsa kosalekeza.