Supply pump selection
Air diaphragm or electric progressive-cavity pump, selected for the order.
T.O.S.S. Tramp Oil Removal System
Remove free-floating, dispersed, and loosely emulsified tramp oil from metalworking coolant with T.O.S.S. This autonomous coolant oil separator treats machine sumps, parts washers, large reservoirs, and coolant pits, returning clarified fluid by gravity without interrupting the machine.
- <0.5%
- tramp oil held in the treated fluid
- 99%
- of oil droplets 20 microns and larger separated, first pass
- 1–2%
- water in recovered oil · potential reclamation
- 2–50 gpm
- portable T1 through 50 GPM
What it is
Coalescing separation beyond the surface
T.O.S.S. combines a floating skimmer, bag filter, and polypropylene coalescing pack in one tramp oil removal system. The skimmer draws oil-rich fluid from the surface and below it. Filtration captures suspended solids, while the coalescing media brings mechanically dispersed and loosely emulsified oil droplets together so they rise and separate along with free-floating oil. Clarified coolant returns by gravity, with the tank, media, skimmer, pump, and discharge integrated on one skid.
- Autonomous operationThe system processes the oil-and-coolant mixture automatically with no machine interruption or continuous operator oversight, whether the machine is running or idle.
- Longer coolant service lifeContinuous separation removes free oils and solids that support bacteria and fungus, helping prevent odors and premature coolant failure.
- Lower-water-content recovered oilSeparated oil leaves at 1 to 2% water content, compared with 30% or more typical of skimmed oil. It may be suitable for reclamation or reuse, subject to composition, waste classification, and recipient requirements.
Equipment components
Inside a standard T.O.S.S.
Bag-filter inlet
Directs incoming fluid through the bag filter to remove suspended solids before coalescing.
Coalescing section
Combines small oil droplets so they rise to the surface for removal.
Electric supply pump
Draws fluid through the floating skimmer and feeds the bag-filter section.
Ballast floating skimmer
Collects fluid and floating oil from the reservoir surface as the fluid level changes.
Tank and support frame
Houses the filtration and coalescing sections and supports the separator assembly.
Electric supply pump and ballast floating skimmer. Configuration varies by model and application.
How it works
How the coolant coalescer works
The skimmer removes the oily surface layer, the bag filter captures solids, and the coalescing media separates tramp oil before clarified coolant returns by gravity.
01Collect oil-rich fluid
The floating skimmer follows the fluid level and draws oil-rich fluid from the surface and below it.
02Filter the solids
The supply pump sends the collected fluid through a bag filter (100µ supplied, 1 to 200µ available) to remove suspended solids.
03Coalesce the oil
Droplets attract to the polypropylene plates, combine, and rise into an oil layer that overflows to the trough and gravity-drains to your drum.
04Return clarified coolant by gravity
An adjustable weir maintains the oil layer while clarified coolant returns to the reservoir by gravity. Separated oil drains independently without an oil pump.
Component illustrations show representative configurations. Filter arrangements and fittings vary by model.
The model line
Tramp oil separators for machine sumps and larger reservoirs
A standard T.O.S.S. provides dedicated tramp oil removal from cutting fluid in CNC machine sumps, or from wash water in parts washers. Larger models serve reservoirs and coolant pits. Use the portable T1 when multiple independent reservoirs can share one separator on a planned schedule. Continuous oil loading, reservoir volume, fluid chemistry, and required treatment rate determine the configuration.
Floor-standing · MT2 through 50T.O.S.S. standard series
Air or electric · 25 to 400 gal capacityIndustrial tramp oil separators sized by loop rate, with a carbon-steel divided tank and air or electric supply pump. Options include a V-bottom, bag-filter solids collection, pre-filter, casters, and extra leg length. Standard and custom sizes are available.
- Flow
- 2 to 50 GPM across the range
- Capacity
- 25 to 400 gallons operating, by model
- Pump
- Air diaphragm or electric progressive cavity, per order
Larger reservoir applicationsT.O.S.S. 150
Skid-mounted · Flanged tank connectionsKeep coolant in service in larger reservoirs and coolant pits with a dedicated T.O.S.S. 150 separator. Pump and skimmer selection are matched to your application.
Request a quote →
Portable modelT.O.S.S. T1
21 × 14 × 25 in · 2 GPM · wheels between sumpsTo treat one reservoir at a time and move between locations, the T.O.S.S. T1 provides the same coalescing separation in a portable, skid-mounted configuration available in six builds.
Explore the portable T.O.S.S. T1 separator →
Configuration choices
Air-operated or electric tramp oil separators
Standard T.O.S.S. models are available with an electric or air-operated supply pump. Casters are an option for equipment that needs to be repositioned.
Optional casters
A caster configuration is available within the standard series. The portable T1 remains a separate model.
View caster and brake detail
Standard series specifications
Compare 2 to 50 GPM T.O.S.S. models
Rated flow is the loop rate; final dimensions and connections are confirmed against shop drawings at quote.
- Solids filtration
- 100-micron bag filterSupplied; 1–200 micron ratings available
- Oil separation
- Oleophilic polypropylene coalescing media
| Model | Flow GPM | Flow GPH | Operating cap. | Clean discharge | Tramp oil discharge | Tank construction |
|---|---|---|---|---|---|---|
| 2 | 120 | 25 gal | 1-1/2" NPT | 1-1/2" | Carbon steel | |
| 3 | 180 | 30 gal | 1-1/2" NPT | 1-1/2" | Carbon steel | |
| 5 | 300 | 37 gal | 1-1/2" NPT | 1-1/2" | Carbon steel | |
| 10 | 600 | 75 gal | 2" NPT | 1-1/2" | Carbon steel | |
| 15 | 900 | 110 gal | 2" NPT | 1-1/2" | Carbon steel | |
| 25 | 1,500 | 290 gal | 3" NPT | 2" NPT | Carbon steel | |
| 50 | 3,000 | 400 gal | at quote | at quote | Carbon steel |
- 180°F
- Max operating temp · 50–180°F ambient range
- 132 ft²/ft³
- Coalescing surface per cubic foot of media, the area behind 99% first-pass separation of oil droplets 20 microns and larger
Options include a pre-filter assembly, V-bottom, casters, extra leg length, electric pump, vertical or ballast skimmer, an ozone generator, and stainless steel construction upon request. Ozone replaces routine biocide dosing with automated bacteria control and odor neutralization. Routine ownership care centers on condition-based filter service and planned cleaning of the accessible separator components. Request the full data sheet →
Skimmer selection
Choose a coolant oil skimmer for the reservoir
Choose between ballast and vertical floating skimmers to match sump depth, surface access, and changes in fluid level.
- For deep open pits
Ballast floating skimmer
For deep open sumps with large level swings or turbulence, such as central filtration systems and coolant pits. Water-ballasted on site so the suction pipes sit right at the surface.
5 · 15 · 30 GPM RATINGS - For shallow, tight sumps
Vertical floating skimmer
A stationary float that clamps to the side of the reservoir, skims the surface, and rides the level up and down. Built for shallow, hard-to-reach sumps; the reservoir must not drop below the float's lowest point.
MAX TRAVEL 4 IN
Rated performance
Separation performance and operating results
- <0.5%
- Tramp oil held in the treated fluid, by volume.
- 99%
- Of oil droplets 20 microns and larger separated on the first pass.
- up to 90%
- Reduction in waste volume sent to the hauler.
- up to 80%
- Reduction in new fluid purchases.
Coolant conservation and operating savings
- up to 90%
- Reduction in waste
volume hauled - <0.5%
- Tramp oil residual,
by volume
Holding tramp oil below half of one percent helps extend coolant service life. Recovered oil with 1% to 2% water content may be suitable for reclamation or reuse, subject to composition, waste classification, and recipient requirements.
To confirm the fit for your own fluid, talk to an EdjeTech engineer.
Common questions
Tramp oil separator selection and ownership
- 01
What is the difference between a tramp oil skimmer and a coalescing separator?
A surface skimmer collects floating oil; a tramp oil coalescer also brings small, separable oil droplets together for removal. T.O.S.S. combines both functions, drawing oil-rich fluid from the surface and below it, filtering suspended solids, and separating free-floating, mechanically dispersed, and loosely emulsified tramp oil. Its media separates 99% of oil droplets 20 microns and larger on the first pass before clarified fluid returns to the reservoir.
- 02
Is a tramp oil filter the same as a coolant oil separator?
A bag filter captures suspended solids; it does not perform the same job as a coalescing oil separator. Equipment described as a tramp oil filter may combine both stages. T.O.S.S. passes incoming fluid through bag filtration before coalescing separates the oil. Top suction identifies the pickup location, not the separation method, so collecting or filtering only the surface layer may leave dispersed and loosely emulsified oil in the coolant.
How coolant filtration and tramp oil removal differ → - 03
Can T.O.S.S. separate oil from coolant and parts-washer fluid?
T.O.S.S. is a coalescing oil-water separator for water-based metalworking coolants, synthetics, and alkaline wash water carrying free, dispersed, or loosely emulsified oil. Chemically emulsified oil cannot be removed through coalescing. When separation behavior is unclear, request a fluid-compatibility review.
Talk to an engineer → - 04
What routine maintenance is required?
T.O.S.S. operates autonomously without interrupting the machine. Routine ownership care is limited to condition-based bag-filter service and planned cleaning of accessible separator components. EdjeTech supplies replacement media, parts, and technical support by model.
- 05
Can fluid compatibility be confirmed before selection?
Yes. An EdjeTech engineer reviews the fluid chemistry, separation behavior, contamination, and operating conditions.
Talk to an engineer → - 06
What support is available after purchase?
EdjeTech supplies replacement skimmers, coalescing media, bag filters, drawings, operating guidance, and troubleshooting support for installed systems.
Review support resources → - 07
Can we feed it with a pump we already own?
Only a progressive-cavity or air-diaphragm pump. Never a centrifugal pump: a centrifugal impeller shears tramp oil into fine droplets and disperses it back through the coolant, undoing the separation.
Already run a T.O.S.S.?
Skimmer floats, coalescer packs, bag filters
Replacement skimmers, coalescing media, and bag filters are available by model, together with manuals and technical support for installed systems.
Equipment advice and pricing
Request a quoteKeep tramp oil out of your working coolant
Remove recurring tramp oil from your reservoirs so usable coolant can stay at work in your machines.
- Equipment quotation
Request a quote
Remove tramp oil and extend coolant life in your reservoirs.
Request a quote → - Request
Spec sheet
The complete datasheet, with dimensions and connections.
Get the spec sheet → - Equipment guidance
Talk to an engineer
Recover unwanted oil that surface skimming leaves in your coolant.
Talk to an engineer → - Estimate savings and payback
Savings calculator
Estimate fluid savings, disposal reduction, and application-specific simple payback using current operating costs and quoted investment.
Estimate savings →