provide a strainer on the line on the inlet side to prevent dirt and sludge from entering the separator. the service life of the coalescer has been designed to be one and a half to three years on the basic of one-hour operation per day. however, ingress of large amounts of dirt and sludge will tremendously shorten its service life. especially, the sludge from the oil purifier is high in viscosity, resulting in clogging of the coalescer. in order to avoid this, the sludge should not be dumped into the bilge tank but should be separately collectec and disposed of.
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