Feem ntau siv flange gaskets tau muab faib ua cov khoom siv tsis yog xim hlau, cov khoom siv hlau semi-hlau thiab hlau gaskets raws li lawv cov khoom siv.
(1) Non-metallic gasket
Cov roj hmab uas tsis yog xim hlau, tseem hu ua cov roj hmab muag, feem ntau suav nrog cov roj hmab asbestos gaskets, PTFE-coated gaskets. Gasket hom feem ntau yog gasket tiaj tus, kev siv lub siab tsis siab, yuav tsum tsis txhob siab tshaj 5. 0MPa, kev siv kub nyob ntawm cov khoom siv gasket.
(2) Semi-metallic gasket
Semi-metallic gasket los ntawm cov hlau thiab non-metallic ob cov ntaub ntawv ua ke rau hauv ib qho kev sib xyaw ua ke, suav nrog winding gaskets thiab hlau-coated gaskets. Cov gasket no muaj kev sib khi zoo thiab kev ua haujlwm siab. Winding gasket tuaj yeem siv rau qhov siab tshaj 25.{{4}MPa thiab 600 degree hnyav.
(3) Hlau gasket
Hlau gaskets yog ua los ntawm cov hlau (los yog alloy) cov ntaub ntawv los ntawm kev siv tshuab. Gasket hom muaj ca gasket, oval-shaped gasket thiab octagonal gasket. Hlau gasket khoom raws li corrosive xwm ntawm nruab nrab thiab kub xaiv, tshwj xeeb yog mos hlau, hlau alloy, tooj liab, txhuas thiab lwm yam. Feem ntau siv rau hauv cov xwm txheej kub ntxhov, kev siv qhov kub thiab txias yog raws li kev xaiv ntawm cov khoom siv.
Ob txoj cai xaiv gasket
(1) Gasket xaiv yuav tsum yog raws li kev sib khi ntawm lub gasket, kev khiav hauj lwm siab, kev khiav hauj lwm kub, kev khiav hauj lwm nruab nrab yam ntxwv thiab sealing yuav tsum tau thiab lwm yam.
(2) Gasket cov ntaub ntawv kev ua tau zoo
Gasket cov ntaub ntawv kev ua tau zoo yuav tsum ua tau raws li cov cai hauv qab no.
① muaj lub cev zoo thiab txhua yam khoom;
② tsis muaj kab mob los ntawm qhov nruab nrab sealing, tsis txhob corrode lub sealing nto, corrosion kuj ntawm lub nruab nrab ua hauj lwm;
③ muaj compression zoo, resilience;
④ muaj kev ntxhov siab me me;
⑤ tsawg to.
(2) Siv tau yooj yim graphite composite gasket
① Lub siab tshaj plaws ua hauj lwm siab ntawm saj zawg zog graphite composite gasket yog 10.0MPa. Qhov siab tshaj plaws ua haujlwm kub nyob ntawm cov khoom siv hlau phaj. Raws li cov khoom siv phaj tseem ceeb, tuaj yeem xaiv ntawm -196 degree ~ 650 degree . Saj zawg zog graphite composite gasket yog tsim rau dej, roj, kuab tshuaj, acids, alkalis, hydrogen, roj thiab roj, high-temperature flue gas, chav thiab lwm yam muaj zog corrosive, permeable media.
② gaskets yuav tsum ua raws li cov qauv kev lag luam chemical tam sim no "steel yeeb nkab flange nrog hloov tau graphite composite gasket" HG 20608 (European system), HG 20629 (Asmeskas system), thiab lwm yam los yog nws cov qauv sib npaug.
(3) Hlau nplhaib gasket
① Hlau nplhaib gaskets haum rau qhov kub thiab txias siab, thiab qhov kub siab tshaj plaws yog qhia hauv Table 10-7-13 raws li cov khoom siv sib txawv;
② gasket yuav tsum ua raws li cov qauv kev lag luam petrochemical tam sim no "pipe flange nrog hlau nplhaib gasket" SH 3403, chemical kev lag luam tus qauv "steel yeeb nkab flange nrog hlau nplhaib gasket" HG 20612 (European system), HG 20633 (American system) thiab cov txheej txheem kev lag luam "pipe flange nrog hlau nplhaib gasket," JB / T 89, thiab lwm yam, los yog nws cov qauv sib npaug;
③ Tus nqi hardness ntawm cov khoom siv hlau nplhaib gasket yuav tsum qis dua ntawm cov khoom flange los ntawm 30-40HB.
(4) Hlau clad gasket
① Hlau clad gasket muaj kev sib khi zoo thiab tsim nyog rau kev tshaj tawm kub dua. Hlau clad gaskets tuaj yeem ua rau gaskets nrog cov duab nyuaj. Dav siv yog tiaj hlau clad gasket;
Qhov siab tshaj plaws kev khiav hauj lwm kub ntawm lub gasket yog qhia nyob rau hauv Table 10-7-14;
③ Gaskets yuav tsum ua raws li cov qauv kev lag luam chemical tam sim no "steel yeeb nkab flanges nrog hlau clad gaskets" HG 20609 (European system), thiab HG 20630 (American system) lossis nws cov qauv sib npaug.
