Application: It is specially used for highly precise machine process and designs which keeping oil in good condition all the time. Features: It is used for highly precise machine process and designs, such as processing center, nc machine, jig borer and so on which are in need of highly clean hydraulic oil in their operation process while filters of the equipments themselves could not remove mechanical impurities of large quantity from oil and keep a little water. Precise oil purifier model jl-i owns three filters, a heater and an absorbent which could remove impurities as well as tiny water.