FC-300B is a 1500L cutting oil filtration equipment which can be coordinated with the grinder equipments prduced by various manufacturers to filter accurately large quantities of tungsten steel produced from grinding. On the one hand, the cutting fluid can be kept clean and constant temperature at all times; on the other hand, the grinding speed can be improved, and the loss rate of grinding wheel can be reduced. This full-range device coordinated with Grundfos pumps are the guarantee of long life and high quality.