Pump/Filter Unit Filters Chips And Sludge From Sumps

A pump/filter unit from Keller Products filters sludge and chips for cutting oil or water-base coolant in machine tool sumps without the need to pump out the sumps or shovel solids. With a recirculation rate of 20 gallons per minute, the portable PFA-1002 completely cleans settled sludge ans suspended chips from a typical sump in minutes, and then is easily moved to another sump and set up to run by connecting a 1/4" compressed air line (no electricals), the company says.

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A pump/filter unit from Keller Products filters sludge and chips for cutting oil or water-base coolant in machine tool sumps without the need to pump out the sumps or shovel solids. With a recirculation rate of 20 gallons per minute, the portable PFA-1002 completely cleans settled sludge ans suspended chips from a typical sump in minutes, and then is easily moved to another sump and set up to run by connecting a 1/4" compressed air line (no electricals), the company says.

The pump/filter unit contains a rugged, high flow rate diaphragm pump and a high-capacity bag filter, mounted in a frame on a compact cart. The self-priming pump pulls the cutting oil or coolant from the sump through a large-diameter vacuum hose into the bag filter, which removes chips and sludge as fine as 5 microns and continuously pumps the filtered liquid back to the sump at high flow velocity.

The force of the filtered liquid discharge scours the bottom of the sump and keeps chips and sludge suspended in the liquid for pickup by the inlet vacuum hose. Average cleaning time for sumps 40 to 150 gallons is about 20 minutes. Because the oil or coolant is not drained from the sump during the cleaning operation, the machine tool need not be taken offline for solids removal.