Kutseka ma valavu ndi gawo lofunika kwambiri la valavu yonse, cholinga chake chachikulu ndikuletsa kutuluka kwa madzi,valavuMpando wotsekera umatchedwanso mphete yotsekera, ndi bungwe lomwe limalumikizana mwachindunji ndi cholumikizira chomwe chili mupaipi ndipo limaletsa cholumikiziracho kuti chisayende. Pamene valavu ikugwiritsidwa ntchito, pamakhala zinthu zosiyanasiyana zomwe zili mupaipi, monga madzi, gasi, mafuta, zinthu zowononga, ndi zina zotero, ndipo zotsekera za mavalavu osiyanasiyana zimagwiritsidwa ntchito m'malo osiyanasiyana ndipo zimatha kusintha kuti zigwirizane ndi zinthu zosiyanasiyana.
TWSValveZimakukumbutsani kuti zipangizo zomangira ma valve zitha kugawidwa m'magulu awiri, omwe ndi zipangizo zachitsulo ndi zinthu zosakhala zachitsulo. Zomangira zosakhala zachitsulo nthawi zambiri zimagwiritsidwa ntchito m'mapaipi pa kutentha kwabwinobwino ndi kupanikizika, pomwe zomangira zachitsulo zimakhala ndi ntchito zambiri ndipo zingagwiritsidwe ntchito pa kutentha kwakukulu.
Rabala yopangidwa ndi zinthu zopangidwa ...≤150°C, rabara yachilengedwe ndi t≤60°C, ndi rabala zimagwiritsidwa ntchito potseka ma valve a globe, ma valve a chipata, ma valve a diaphragm, ma valve a gulugufe, ma valve owunikira, ma valve opinikiza ndi ma valve ena okhala ndi PN yokakamiza pang'ono.≤1MPa.
2. Nayiloni
Nayiloni ili ndi mawonekedwe a coefficient yaying'ono yolimbana ndi dzimbiri komanso kukana dzimbiri bwino. Nayiloni imagwiritsidwa ntchito kwambiri pa ma valve a mpira ndi ma valve a globe okhala ndi kutentha kwa t≤90°C ndi kupanikizika kwa dzina PN≤32MPa.
PTFE imagwiritsidwa ntchito kwambiri pa ma valve a globe, ma valve a chipata, ma valve a mpira, ndi zina zotero. ndi kutentha kwa t≤232°C ndi kupanikizika kwapadera kwa PN≤6.4MPa.
4. Chitsulo chopangidwa ndi pulasitiki
Chitsulo chopangidwa ndi chitsulo chimagwiritsidwa ntchito pa ma valve a chipata, ma valve a globe, ma valve a pulagi, ndi zina zotero. pa kutentha kwa t≤100°C, kupanikizika kwa dzina PN≤1.6MPa, gasi ndi mafuta.
5. Babbitt alloy
Babbitt alloy imagwiritsidwa ntchito pa valavu ya ammonia globe yokhala ndi kutentha kwa t-70 ~ 150℃ndi kupanikizika kwa dzina PN≤2.5MPa.
6. Aloyi wa mkuwa
Zipangizo zomwe zimagwiritsidwa ntchito kwambiri popanga zitsulo zamkuwa ndi 6-6-3 tin bronze ndi 58-2-2 manganese brass. Mkuwa wa alloy umakhala wolimba kwambiri ndipo ndi woyenera kugwiritsidwa ntchito m'madzi ndi nthunzi ndi kutentha kwa t≤200℃ndi kupanikizika kwa dzina PN≤1.6MPa. Nthawi zambiri imagwiritsidwa ntchito mu ma valve a chipata, ma valve ozungulira, ma valve owunikira, ma valve olumikizira, ndi zina zotero.
7. Chitsulo chosapanga dzimbiri cha Chrome
Mitundu ya chitsulo chosapanga dzimbiri cha chromium yomwe imagwiritsidwa ntchito kwambiri ndi 2Cr13 ndi 3Cr13, yomwe yazimitsidwa ndi kutenthedwa, ndipo imakhala ndi kukana dzimbiri kwabwino. Nthawi zambiri imagwiritsidwa ntchito pa ma valve a madzi, nthunzi ndi mafuta okhala ndi kutentha kwa t≤450℃ndi kupanikizika kwa dzina PN≤32MPa.
8. Chitsulo chosapanga dzimbiri cha Chrome-nickel-titanium
Chitsulo chosapanga dzimbiri cha chromium-nickel-titanium chomwe chimagwiritsidwa ntchito kwambiri ndi 1Cr18Ni9ti, chomwe chili ndi kukana dzimbiri, kukana kukokoloka kwa nthaka komanso kukana kutentha. Ndi choyenera kugwiritsa ntchito nthunzi ndi zinthu zina zomwe zimakhala ndi kutentha kwa t.≤600°C ndi kupanikizika kwapadera kwa PN≤6.4MPa, ndipo imagwiritsidwa ntchito pa ma valve a globe, ma valve a mpira, ndi zina zotero.
9. Chitsulo chothira madzi
Chitsulo choyezera nitriding chomwe chimagwiritsidwa ntchito kwambiri ndi 38CrMoAlA, chomwe chimakhala ndi kukana dzimbiri komanso kukana kukanda pambuyo pokonza carburizing. Nthawi zambiri chimagwiritsidwa ntchito m'ma valve a chipata cha magetsi okhala ndi kutentha kwa t≤540℃ndi kupanikizika kwa dzina PN≤10MPa.
10. Kusakaniza Boroni
Kubowola kumakonza mwachindunji pamwamba pa kutseka kuchokera ku zinthu za thupi la valavu kapena thupi la diski, kenako kumakonza pamwamba pa boronizing. Pansi pa kutseka pali kukana bwino kwa kuwonongeka. Pa valavu yogwetsa magetsi.
Pamene valavu ikugwiritsidwa ntchito, zinthu zomwe ziyenera kuganiziridwa ndi izi:
1. Kutseka kwa valavu kuyenera kuyesedwa kuti zitsimikizire kuti ikugwira ntchito bwino.
2. Yang'anani ngati pamwamba pa valavu patha, ndipo konzani kapena kusintha malinga ndi momwe zinthu zilili.
Nthawi yotumizira: Januwale-04-2023
