Valve sealing material chikamu chakakosha chevhavha chisimbiso. Chii chinonzi valve sealing materials? Isu tinoziva kuti valve yekuisa chisimbiso mhete zvinhu zvakakamurwa kuita mapoka maviri: simbi uye isiri-simbi. Izvi zvinotevera sumo pfupi kumamiriro ekushandiswa kwezvinhu zvakasiyana-siyana zvekuisa chisimbiso, pamwe chete nemhando dzevhavha dzinowanzoshandiswa.
1. Synthetic rabha
Iyo yakazara zvimiro zvesynthetic rubber senge mafuta kuramba, tembiricha kuramba uye corrosion resistance zviri nani pane izvo zvechisikigo rabha. Kazhinji, tembiricha yekushandiswa kwerabha yakagadzirwa ndeye t≤150 ℃, uye tembiricha yerabha yechisikigo ndeye t≤60℃.Rubber inoshandiswa kuvhara mavharuvhu eglobe,rubber akagara gedhi vharafu, diaphragm mavharuvhu,rubber akagara butterfly vharafu, rubber akagara swing cheki vharafu (cheki mavharuvhu), pinch mavharuvhu uye mamwe mavharuvhu ane zita rekumanikidza PN≤1MPa.
2. Naironi
Nylon ine hunhu hwediki friction coefficient uye yakanaka corrosion kuramba. Nylon inonyanya kushandiswa kubhora mavharuvhu uye globe mavharuvhu ane tembiricha t≤90 ℃ uye nominal pressure PN≤32MPa.
3. PTFE
PTFE inonyanya kushandiswa kune globe mavharuvhu,gedhi mavharuvhu, bhora mavharuvhu, etc. pamwe tembiricha t≤232℃ uye nominal kumanikidzwa PN≤6.4MPa.
4. Kanda simbi
Cast iron inoshandiswagedhi vharafu, globe valve, plug valve, nezvimwewo zvekushisa t≤100℃, nominal pressure PN≤1.6MPa, gasi nemafuta.
5. Babbitt alloy
Babbitt alloy inoshandiswa kune ammonia globe valve ine tembiricha t-70 ~ 150 ℃ uye zita rekumanikidza PN≤2.5MPa.
6. Copper alloy
Zvishandiso zvakajairika zvemhangura alloys ndeye 6-6-3 tin bronze uye 58-2-2 manganese ndarira. Copper alloy ine zvakanaka kupfeka kuramba uye inokodzera mvura uye chipfunga chine tembiricha t≤200 ℃ uye yezita kudzvanywa PN≤1.6MPa. Inoshandiswa kazhinji mukatigedhi mavharuvhu, mavharuvhu epasi,cheki mavharuvhu, mavharuvhu eplug, nezvimwe.
7. Chrome simbi isina tsvina
Iwo anowanzo shandiswa mamakisi echromium simbi isina simbi ndeye 2Cr13 uye 3Cr13, iyo yakadzima uye yakapfava, uye ine yakanaka corrosion resistance. Inowanzo shandiswa mumavharuvhu emidhiya senge mvura, chiutsi uye peturu ine tembiricha t≤450 ℃ uye yezita kudzvanywa PN≤32MPa.
8. Chromium-nickel-titanium simbi isina tsvina
Iyo inowanzoshandiswa giredhi yechromium-nickel-titanium simbi isina tsvina ndeye 1Cr18Ni9ti, iyo ine yakanaka yekusagadzikana, inodzivirira kuvhuvhuta uye kupisa kupisa. Inokodzera chiutsi, nitric asidhi uye mamwe midhiya ane tembiricha t≤600 ℃ uye yezita kudzvanywa PN≤6.4MPa, inoshandiswa kune globe valve, bhora vharafu, nezvimwe.
9. Nitrided simbi
Iyo inowanzo shandiswa giredhi renitrided simbi ndeye 38CrMoAlA, ine yakanaka corrosion resistance uye scratch resistance mushure mekurapa carburizing. Inowanzo shandiswa mumagetsi chiteshi gedhi vharafu ine tembiricha t≤540 ℃ uye yezita kudzvanywa PN≤10MPa.
10. Boronizing
Boronizing inobata zvakananga nzvimbo yekuisa chisimbiso kubva kuzvinhu zvemuviri wevharuvhu kana disc body, uye yobva yaita boronizing pamusoro pekurapa, iyo yekuisa chisimbiso ine yakanaka kupfeka kuramba. Inoshandiswa mumagetsi station blowdown valve.
Nguva yekutumira: Jun-10-2022
