Mechanical foob raws li ib puag ncig tsis zoo ib yam, sealing nto ntawm cov khoom tsis zoo ib yam, O-ring sealing nto cov ntaub ntawv ntawm lub tshuab foob rau lub luag hauj lwm zoo ntawm cov tshuab foob tau pab O nplhaib cov khoom siv dab tsi?
1, nitrile roj hmab NBR pab kho tshuab foob O hom nplhaib: ib qho hluavtaws roj hmab copolymerization ntawm butadiene thiab acrylonitrile yog npaj, nrog cov roj zoo heev, tsis kam tiv taus, kev laus tsis kam thiab huab cua nruj, tab sis ozone kuj, hluav taws xob rwb thaiv tsev thiab txias tsis kam. (cov roj ntxhia, tsiaj txhu thiab zaub roj, aliphatic hydrocarbons muaj kev tiv thaiv corrosion zoo heev, dav siv hauv cov roj av thiab lwm yam khoom siv roj, lub zog thiab tsis muaj oxidizing dilute acid thiab alkali corrosion, tsis muaj oxidation resistant acid nitric acid, chromic acid, {}, ester , ketone, aromatic ether, halogenated hydrocarbon corrosion, yog li tsis tshua siv rau cov tshuab foob foob pab "O" cov khoom siv nplhaib)
Siv tau qhov kub thiab txias: ~ 120 C -40 C. Powdered nitrile roj hmab (PNBR): cov khoom tshiab raws li kev siv sib txawv.
2, peb yuan ntawm ethylene propylene roj hmab mechanical seal: ethylene, propylene thiab non conjugated diene copolymer (peb lub tshuab foob "O" nplhaib yuav luag tsis muaj cov khoom no)
3, fluorine roj hmab (FPM2602, F26) ntawm lub tshuab foob: kub tsis kam, roj tsis kam, muaj zog acid, muaj zog alkali thiab muaj zog corrosive nruab nrab (feem ntau siv cov ntaub ntawv ntawm cov tshuab foob hom "O" nplhaib)
Qhov ntsuas kub: ~ 175 C -7 C
4, butyl roj hmab HR: mechanical seal "O" hom nplhaib tsuas yog tsis muaj cov khoom siv raw no
Mechanical seal nplhaib khoom siv feem ntau siv "O" hom: fluorine roj hmab (FKM), perfluorinated roj hmab (FFKM), nitrile roj hmab (NBR), ob chav coated PTFE ob coated PTFE fluorine roj hmab, ethylene propylene roj hmab, saj zawg zog graphite
Lus Cim: PTFE: PTFE, kub tsis kam, roj tsis kam, corrosion kuj zoo dua
Qhov ntsuas kub: ~ 250 C -150 C