Zogulitsa
Valavu ya pulagi yamanja
✧ Kufotokozera
Valavu yolumikizira yamtundu wa sleeve ndi kapangidwe kake ka valavu yolumikizira pomwe pulagi yozungulira kapena yopapatiza mkati mwa valavu imagwiritsidwa ntchito kuwongolera kuyenda kwa madzi. Pulavu ili ndi gawo lodulidwa lomwe limagwirizana ndi njira yolumikizira madzi ikatseguka, zomwe zimapangitsa kuti madzi adutse, ndipo imatha kuzunguliridwa kuti ilepheretse kuyenda kwa madzi ikatsekedwa. Mtundu uwu wa valavu umadziwika ndi kuthekera kwake kotseka mwamphamvu, kutsika pang'ono kwa kupanikizika, komanso kugwiritsidwa ntchito mosiyanasiyana pamitundu yosiyanasiyana, kuphatikiza machitidwe ndi mafakitale omwe amasamalira zakumwa ndi mpweya. Mavalavu olumikizira amtundu wa sleeve amagwiritsidwa ntchito kwambiri m'mafakitale monga mafuta ndi gasi, petrochemical, mankhwala, ndi mafakitale ena opangira chifukwa chodalirika komanso kuthekera kwawo kugwira mitundu yosiyanasiyana yamadzimadzi. Mavalavu awa amathanso kukhala ndi zinthu monga pulagi yopaka mafuta, kusinthasintha kwa kupanikizika, ndi zipangizo zosiyanasiyana zomangira kuti zigwirizane ndi zofunikira za njira ndi momwe amagwirira ntchito. Ngati mukufuna zambiri za mavalavu olumikizira amtundu wa sleeve kapena muli ndi mafunso ena okhudza momwe amagwiritsidwira ntchito kapena kukonza, musazengereze kufunsa.
✧ Makhalidwe a valavu ya pulagi yamtundu wa Sleeve
1. Kapangidwe ka chinthucho ndi kokongola kwambiri, kodalirika, kogwira ntchito bwino, kogwirizana ndi kukongola kwa njira.
2. Kudzera mu chikwama chofewa ndi chitoliro chachitsulo, kulumikizana kosokoneza kuti zitsimikizire kutsekedwa, kusinthika kwamphamvu.
3. valavu ikhoza kuyikidwa mokwanira, osati kulamulidwa ndi njira yoyikira; valavuyo ndi yaying'ono kukula kwake ndipo ilibe zofunikira zapadera pa malo oyikira.
4. Valavu ingagwiritsidwe ntchito poyenda mbali ziwiri, yosavuta kupanga mu mawonekedwe a multi-pass, yosavuta kuwongolera kuyenda kwa mapaipi.
5. Pali mlomo wapadera wachitsulo wa 360° pakati pa chikwama ndi thupi la valavu, womwe ungateteze ndikukonza chikwamacho bwino, kuti chisazungulire ndi pulagi, ndipo ukhoza kutseka chikwamacho ndi thupi la valavu kuti chikhale chodalirika komanso chokhazikika.
6. pulagi ikazungulira, imakanda pamwamba pa chitseko, zomwe zimapangitsa kuti imadziyeretse yokha, yoyenera kugwiritsa ntchito zolumikizira zokhuthala komanso zosavuta.
7. valavu ilibe mpata wamkati woti isunge cholumikiziracho.
8. Vavu ndi yosavuta kupanga kuti ikhale yolimba ngati moto.
✧ Magawo a valavu yolumikizira ya mtundu wa Sleeve
| Chogulitsa | Valavu ya pulagi yamtundu wamanja |
| M'mimba mwake mwa dzina | NPS 2”, 3”, 4”, 6”, 8”, 10”, 12”, 14”, 16”, 18”, 20”, 24”, 28”, 32”, 36”, 40”, 48” |
| M'mimba mwake mwa dzina | Kalasi 150, 300, 600, 900, 1500, 2500. |
| Kulumikiza Komaliza | Flanged (RF, RTJ) |
| Ntchito | Gudumu Logwirira, Chogwirira cha Pneumatic, Chogwirira cha Magetsi, Tsinde Lopanda Chilema |
| Zipangizo | Kuponya: A216 WCB, A351 CF3, CF8, CF3M, CF8M, A352 LCB, LCC, LC2, A995 4A. 5A, Inconel, Hastelloy, Monel |
| Kapangidwe | Bore Yokwanira kapena Yochepetsedwa, RF, RTJ |
| Kapangidwe ndi Wopanga | API 6D, API 599 |
| Maso ndi Maso | API 6D, ASME B16.10 |
| Kulumikiza Komaliza | RF, RTJ (ASME B16.5, ASME B16.47) |
| Kuyesa ndi Kuyang'anira | API 6D, API 598 |
| Zina | NACE MR-0175, NACE MR-0103, ISO 15848 |
| Ikupezekanso pa | PT, UT, RT,MT. |
| Kapangidwe koteteza moto | API 6FA, API 607 |
✧ Utumiki Wogulitsa Pambuyo Pogulitsa
Ntchito yogulitsa valavu yoyandama pambuyo pogulitsa ndi yofunika kwambiri, chifukwa ntchito yogulitsa pambuyo pogulitsa yokha ndi yomwe ingatsimikizire kuti ikugwira ntchito kwa nthawi yayitali komanso mokhazikika. Izi ndi zomwe zili mu ntchito yogulitsa pambuyo pogulitsa pambuyo pogulitsa:
1. Kukhazikitsa ndi kuyambitsa: Ogwira ntchito yogulitsa pambuyo pa malonda adzapita kumaloko kukayika ndikukonza valavu yoyandama kuti atsimikizire kuti ikugwira ntchito bwino komanso mokhazikika.
2. Kukonza: Sungani valavu yoyandama nthawi zonse kuti muwonetsetse kuti ikugwira ntchito bwino komanso kuchepetsa kulephera.
3. Kuthetsa Mavuto: Ngati valavu yoyandama yalephera, ogwira ntchito yogulitsa pambuyo pogulitsa adzachita kukonza mavuto pamalopo nthawi yochepa kwambiri kuti atsimikizire kuti ikugwira ntchito bwino.
4. Kusintha ndi kukweza zinthu: Poyankha zida zatsopano ndi ukadaulo watsopano womwe ukutuluka pamsika, ogwira ntchito yogulitsa pambuyo pa malonda adzapereka malangizo mwachangu kwa makasitomala kuti asinthe ndikusintha zinthu kuti awapatse zinthu zabwino kwambiri.
5. Maphunziro a chidziwitso: Ogwira ntchito yogulitsa pambuyo pogulitsa adzapereka maphunziro a chidziwitso cha ma valavu kwa ogwiritsa ntchito kuti akonze kayendetsedwe ka kayendetsedwe ka ntchito ndi kukonza kwa ogwiritsa ntchito pogwiritsa ntchito ma valavu a mpira woyandama. Mwachidule, ntchito yogulitsa pambuyo pogulitsa ya valavu ya mpira woyandama iyenera kutsimikizika mbali zonse. Mwanjira imeneyi yokha ndi yomwe ingapatse ogwiritsa ntchito chidziwitso chabwino komanso chitetezo chogula.
