DSP Coalescence-separation diesel fuel oil filter flushing machine is designed to remove free water and dissolved water from lube oils or diesel fuel, coalescing filter will make the free and dissolved water from small molecule to big drop, then separation filter remove the water drop by gravity, falling into the water tank. DSP diesel fuel oil filter flushing machine removes the particles by stages of filters and cleanness up to NAS grade 6. It is applicable for on line running with light oil filled, turbine oil filled and lubricating oil filled systems, especially good for water- leakage systems.