초록 ▼

Versatile filtering apparatus is provided, particularly for processing liquid or coolant used with metal-working machines. The apparatus is adaptable for processing coolant in a wide variety of coolant systems to meet a variety of requirements of metal-working machines in a plant. The apparatus incl

Versatile filtering apparatus is provided, particularly for processing liquid or coolant used with metal-working machines. The apparatus is adaptable for processing coolant in a wide variety of coolant systems to meet a variety of requirements of metal-working machines in a plant. The apparatus includes a dirty liquid tank in side-by-side relationship with a clean liquid tank, a coalescing unit, a filtering unit, an automatic supply or fill valve for supplying liquid to the apparatus from the coolant system, and an automatic discharge valve for supplying processed liquid from the apparatus back to the coolant system. The coalescing unit separates free oils from the liquid and the filtering unit separates solid particles from the liquid. The processed liquid is then discharged back to the coolant system along with fresh coolant. The overall processing time, along with the time for operating the coalescing unit and the filtering unit, can be changed to adapt the filtering apparatus to meet the particular requirements of particular coolant systems.

대표청구항 ▼

In combination, a coolant system comprising a coolant reservoir, a metal-working machine, means for supplying coolant from said reservoir to said machine, and means for supplying coolant from said machine to said reservoir, filtering apparatus for processing the coolant, said apparatus comprising a

In combination, a coolant system comprising a coolant reservoir, a metal-working machine, means for supplying coolant from said reservoir to said machine, and means for supplying coolant from said machine to said reservoir, filtering apparatus for processing the coolant, said apparatus comprising a clean coolant tank, a dirty coolant tank, a coalescing unit for separating free oil from the coolant, means for supplying coolant from said dirty coolant tank to said coalescing unit, means for supplying coolant from said coalescing unit to said dirty coolant tank, a filtering unit for separating particles from the coolant, means for supplying coolant from said dirty coolant tank to said filtering unit, means for supplying filtered coolant from said filtering unit to said dirty coolant tank and, alternately, to said clean coolant tank, an automatic fill valve for enabling the supply of coolant from said coolant system to said dirty coolant tank and for stopping the supply of coolant thereto when the liquid therein reaches a predetermined level, an automatic discharge valve for enabling the supply of clean coolant from a lower portion of said clean liquid tank directly to said coolant system when the clean coolant rises to a predetermined upper level in said clean coolant tank, and for stopping the supply of coolant to said coolant system after the coolant in said clean coolant tank drops to a predetermined lower level, and time delay means for causing said automatic fill valve to enable the supply of coolant again to said dirty coolant tank a predetermined period of time after said discharge valve stops the supply of coolant to said coolant system.