ISO 8434-1 2018 O-rings siv nrog DIN lub raj txuas nrog cov ntawv no yuav tsum tau ua ntawm acrylonitrile-butadiene roj hmab (NBR) nrog qhov nyuaj ntawm (90 ± 5) IRHD, ntsuas raws li ISO 48, thiab yuav tsum ua raws li cov ntsiab lus tau muab teev rau hauv Cov Txheej Txheem 7 thiab yuav tsum tau ua tiav lossis tshaj O-lub nplhaib kom txais tau cov kev cai ntawm ISO 3601-3, qib N. Cov xwm txheej uas muaj qhov siab thiab kub ntawm cov ntaub ntawv no thiab / los yog hydraulic kua siv hauv system txawv ntawm cov uas tau muab teev rau hauv Clause 5 thiab Table 1, qhov chaw txuas khoom sib txuas lus yuav tsum tau sab laj los xyuas kom meej tias cov khoom O-ring tsim nyog tau xaiv.
