... and filter maintenance reminder.DETAILS:Ruixin CRD-A-II series oil mist filter is dedicated filter unit ... For example , main filters filter dimension of CRD-A-II series is 24m2,which contains 2 filter stages.The ... function to oil mist. The second stage is a protective filter stage, HEPA filter, the oil mist ... . After these two stages of filtration, CRD-A-II series of oil mist filter gas emissions can ...