Lub neej kev pab cuam ntawm cov roj hmab foob feem ntau yog nyob ntawm 3 mus rau 10 xyoo, nyob ntawm seb cov khoom siv, qhov chaw ua haujlwm, thiab kev siv.
Cov yam tseem ceeb uas cuam tshuam rau lub neej muaj xws li:
1. Kev xaiv cov khoom siv (xws li, qhov sib txawv ntawm qhov kub thiab txias / tshuaj tiv thaiv ntawm cov roj hmab sib txawv xws li NBR, EPDM, thiab FKM);
2. Kev khiav hauj lwm kub (lifespan tej zaum yuav raug txo los ntawm 50% rau txhua txhua 10℃tshaj cov khoom kub txwv);
3. Siab load (nruam siab ceev ceev compression teeb);
4. Media compatibility (roj, acids, alkalis, thiab lwm yam tshuaj corrosion);
5. Dynamic/static siv (dynamic seals hnav sai dua). Piv txwv li, automotive roj ntsaws ruaj ruaj kav ntev li ntawm 5-8 xyoo nyob rau hauv 80℃cav roj ib puag ncig, thaum fluororubber seals rau tshuaj twj tso kua mis tsuas kav 2-3 xyoo nyob rau hauv ib tug muaj zog acid ib puag ncig. Nws raug nquahu kom hloov cov ntsaws ruaj ruaj thaum ntxov los ntawm kev kuaj xyuas cov cim ntawm kev hnav thiab tawv tawv ntawm daim di ncauj.
