Adopting the advanced coalescence-separation technique, Fengyu has successfully exploited HPC series of coalescence-separation oil purifier for the dehydrating of hydraulic oil, lubricant oil and turbine oil etc. It combines high efficiency filtration and dehydration function in one, and efficiently removes free and dissolved water, dirt, air and gases from oil. The filtration fineness complies with HAS2-6 standard, with automatic continual operation under no human supervision. It has many advantages over other vacuum, centrifugal or pressure oil purifiers.