Silicon nitride ceramic is a new material technology application of mechanical seals rau cov twj tso kua mis. Ntau lub tuam txhab siv hluav taws xob hauv tsev tam sim no siv graphite, alumina ceramics, cemented carbide, stainless hlau thiab polytetrafluoroethylene. Cov hnav tsis kam, corrosion resistance thiab vibration resistance ntawm cov ntaub ntawv no tsis zoo li silicon nitride ceramics, yog li nws yog ib qho zoo tagnrho txhua yam khoom siv foob nplhaib. Piv txwv li, rau hydrochloric acid twj thiab ferric chloride twj nyob rau hauv cov tshuaj nroj tsuag, yog siv silicon nitride ceramics los hloov cov kua qaub-resistant ceramics thiab graphite raws li mechanical seals rings, lub sij hawm kev pab cuam yuav nce ntau zaus. Lub tshuab nqus tsev twj tso kua mis submersible twj tso kua mis rau cov kav dej nyob deb nroog thiab cov kav dej yog los tiv thaiv dej los ntawm kev nkag mus thiab hlawv tawm lub cev muaj zog. Ntxiv mus, qhov chaw ua hauj lwm ntawm lub twj tso kua mis no yog tag nrho ntawm cov sediment, yog li kev hnav tsis kam ntawm lub nplhaib sealing yuav tsum ua kom zoo. Tsis tas li ntawd, cov twj tso dej hauv hiav txwv feem ntau nres hauv cov chaw nres nkoj nrog cov xuab zeb hnyav, uas tseem yuav tsum tau muaj corrosion thiab hnav tsis kam ntawm lub tshuab sealing nplhaib ntawm lub twj tso kua mis. Yog tias silicon nitride ceramic siv es tsis txhob graphite li sealing nplhaib, lub neej ua haujlwm tuaj yeem txhim kho tau zoo.
The use of silicon nitride ceramics as valves and ball valves has also revealed its edge in the chemical industry Most valves used in chemical plants work in highly corrosive media, and sometimes need to withstand high temperature and high pressure In the past, the service life of ball valves made of cast iron or alloy was short. If silicon nitride ceramic ball valves were used, the situation would change, and their service life could be increased by more than 100 times.
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