GRAVITY FILTERS
Model HGF
Model DBGF
Model LGF
Model LF (Li'l Fil)

AIR VACUUM FILTERS
Model SCF
Model HVSCF
Model FLA

LIQUID VACUUM 
FILTERS
Model LVF

PRESSURE FILTERS
Model APF

SLUDGE FILTERS
Model SF

ABSORPTION FILTERS
Model ABS

MAGNETIC 
SEPARATORS
Model MSI
Model MSI Video

CENTRIFUGES
Model ACF
Model ASF
Model MCF

EVAPORATORS
Model TEB

VACUUM 
DISTILLATION UNIT
Model VDU
Model VDU Video

OIL-WATER 
SEPARATION
Model OWS
Model DTOS

AUXILIARY
EQUIPMENT
Model SMR
Model SDU

ALUMINUM ROLLING AND DRAWING
Cold Rolling Coolants
Aluminum Wire Drawing

METAL GRINDING
Roll Grinding Coolants
Centerless Grinding
Parts Grinding Coolants

INDUSTRIAL 
WASTEWATER
Spent Coolants
Process Wastewaters

MACHINING
Machining Coolants
Honing Coolants
Gun Drilling Coolants

METAL FINISHING
Alkaline Cleaners
Acid Pickling Solutions
Electroplating Rinsewater

PAINT SLUDGE
Paint Sludge Dewatering

PHOSPHATING
Sodium Phosphate Solns
Iron Phosphate Solutions

STEEL ROLLING
Cold Rolling Coolants
Stainless Steel Rolling Oils

WIRE DRAWING
(NON-FERROUS)
Continuous Cast
Wire Drawing Emulsions
Annealer Quenchants
Spent Emulsion Disposal

WIRE DRAWING
(FERROUS)
Wire Drawing Emulsions
SST Drawing Oils
Annealer Quenchants
Dry Soap Rinsewaters

In many applications, tramp oils find their way into coolants, quenchants, surface waters, and other aqueous solutions. This can have detrimental results such as reduced cooling in machining and drawing processes, poor product quality such as dimensional instability and contamination of manufactured parts as well as the process fluids.

Typically tramp oils have a lower specific gravity than water and tend to be immiscible in water. This causes the tramp oil to float on the surface of the aqueous solution or coolant.

Filtertech’s Oil Skimmer provides an effective means for removing tramp oil from the liquid surface. The unique design Model DTOS “Oil Eater” Oil Skimmer allows the ability to have a single tube skimmer or dual tube skimmer. When operated as a dual tube skimmer, the skimming tubes can be arranged to operate on the same side for single tank cleaning or the tubes can be positioned on opposite sides of the skimmer to allow simultaneous cleaning of both compartments.

Mode of Operation

The “Oil Eater” Model DTOS Oil Skimmer can be mounted over the top of a tank or over the tank side. An optional control panel can be remotely mounted from the skimmer.

Due to the lower specific gravity of the tramp oil, contaminants will float to the surface of the liquid. The Model DTOS uses a specially- designed capstan drive that moves an elastomer skimming tube into the tank where the tube floats on the surface of the liquid. As the tube moves along the surface, the tramp oils adhere to the tube surface. The tube then exits the tank, and the tramp oil is removed from the tube by specially-designed hemispherical wiping glands that provide a complete 360° removal from the tube. The tube then passes over the drive capstan and is returned to the tank for more oil removal.

FIGURE 1
MODEL DTOS DUAL TUBE OIL SKIMMER

The oil that is removed from the tube then drains by gravity either to a collection receptacle or to an optional decantation tank. There the tramp oil is concentrated further, and the excess water or emulsion is returned to the main tank.

The Model DTOS is available in both single and dual tube versions. Additionally, the dual tube design can be configured with both tubes skimming on the same side of the skimmer or on opposite sides to allow skimming of two separate compartments simultaneously. The Model DTOS with single tube configuration has the flexibility of being easily retrofitted to a dual tube configuration. A dual tube configuration can also be easily converted between the single compartment to two compartment operation.

As an option, the Model DTOS can be equipped with a variable speed drive or timer to provide improved control over the rate of tramp oil removal.

For more information request Product Bulletin FT235 or download PDF file.

Note: PDF files require Adobe Acrobat Reader for viewing. If you do not have Acrobat Reader, click here or the link below.