Gaskets raug faib ua peb pawg loj raws li lawv cov khoom siv: non-metallic, semi-metallic, thiab metallic gaskets.
Tsis yog-metallic Gaskets
Tsis yog -cov khoom siv hlau yog cov yam ntxwv ntawm lawv cov kev ntxhib los mos, kev tiv thaiv corrosion, thiab tus nqi qis; Txawm li cas los xij, lawv muaj qhov tsis zoo rau qhov kub thiab txias. Lawv feem ntau yog siv rau flange sealing nyob rau hauv nruab nrab - mus rau - cov hlab ntsha uas tsis tshua muaj siab lossis cov kav dej ua haujlwm ntawm qhov nruab nrab ntawm qhov kub thiab txias. Piv txwv ntawm cov khoom tsis yog-cov khoom siv hlau muaj xws li roj hmab gaskets, asbestos gaskets, asbestos- roj hmab gaskets, saj zawg zog graphite gaskets, thiab PTFE (polytetrafluoroethylene) gaskets.
Semi-metallic Gaskets (tseem hu ua Hlau-Composite Gaskets)
Txawm hais tias tsis yog- cov khoom siv hlau muaj qhov zoo xws li kev yooj yim zoo, compressibility, thiab tsim nyog rau cov khoom siv qis qis, lawv qhov teeb meem tseem ceeb yog lawv lub zog tsis tshua muaj zog thiab tsis muaj zog, ua rau lawv tsis haum rau siab - siab thiab siab - cov ntawv siv kub. Yog li ntawd, semi-cov roj hmab gaskets tau tsim los ua ke kom muaj zog ntawm ob hom khoom siv- tshwj xeeb, cov qauv tsim muaj zog, kev ua haujlwm siab dua, thiab siab - qhov kub thiab txias ua rau cov yam ntxwv ntawm cov khoom siv hlau- ua rau cov qauv sib xyaw ua ke uas ua rau cov yam ntxwv zoo tshaj plaws ntawm ob qho tib si.
Hlau Gaskets
Raws li kev ua haujlwm hnyav-xws li qhov kub thiab txias, kub siab, thiab nquag thauj khoom caij tsheb kauj vab- ntau yam khoom siv hlau tseem yog qhov kev xaiv zoo tshaj plaws rau sealing gaskets. Cov khoom siv feem ntau suav nrog tooj liab, txhuas, qis- carbon steel, stainless hlau, thiab chromium-nickel alloy steel. Txhawm rau txo cov bolt loads thiab xyuas kom muaj cov qauv tsim qauv, cov pav ca hlau yog feem ntau tsim nrog qhov dav nqaim thaum twg los tau; Tsis tas li ntawd, ntau hom nplhaib gaskets uas muaj kab -cov yam ntxwv sib txuas yog feem ntau yog cov qauv tsim.
Pav ca Hlau Gaskets
Thaum siv nyob rau hauv ib tug ca configuration, cov gaskets yog dav categorized ua ob hom: wide gaskets thiab nqaim gaskets. Cov gaskets dav yuav tsum muaj ntau yam ua ntej-tightening rog, uas tuaj yeem yooj yim induce deformation nyob rau hauv lub bolts thiab flanges; yog li ntawd, lawv tsis tshua siv rau ntawm du -flanges flanges nyob rau hauv cov ntawv thov uas qhov kev khiav hauj lwm siab tshaj 1.96 MPa. Cov gaskets nqaim yooj yim dua ua ntej- nruj thiab tsim nyog siv rau hauv cov kav dej ua haujlwm hauv qhov siab ntawm 6.27 txog 9.8 MPa.
Corrugated Hlau Gaskets
Corrugated metallic gaskets feem ntau yog tsim los ntawm cov ntawv hlau nrog lub thickness ntawm 0.25 mus rau 0.8 hli. Tag nrho cov thickness ntawm lub tiav lawm gasket feem ntau sib haum mus rau 40% mus rau 50% ntawm nws yoj suab (wavelength). Cov gaskets no tau zoo- haum rau siv rau ntawm qhov chaw sib khi du thiab hauv cov kav dej ua haujlwm ntawm qhov siab txog li 3.34 MPa.
Serrated Hlau Gaskets
Serrated metallic gaskets feem ntau yog siv hauv cov kav dej ua haujlwm nyob rau hauv qhov siab ntawm 6.77 txog 9.8 MPa. Cov hniav pitch yog kwv yees li 1.5 hli, thiab ob qho tib si cov hniav thiab cov hauv paus hniav yog 90 degrees. Nws sealing kev ua tau zoo yog superior rau ntawm cov pav ca gaskets, thiab nws yuav tsum tau tsawg clamping quab yuam.
