Compared with the DO type floating seals, the DF type design requires less installation space, and the shape of the corresponding groove is easier to process. However, the corresponding groove of this series of seals has higher processing accuracy requirements.
Since the compression deformation of DF type rubber ring and DO type rubber ring is different, it must be installed strictly according to the specified compression size and clearance. If the gap is too small, it may cause cold welding of the sealing surface, and if the gap is too large, it may cause oil leakage. At the same time, the deviation of the processing size will also affect the elastic reserve of the rubber ring and shorten the service life.