Central coolant filtration systems for machine shops.
A central coolant filtration and recycling system processes coolant for multiple machines at one station. C.R.O.S.S. removes tramp oil and particulate, corrects coolant concentration, and maintains clean coolant for immediate use 24/7/365.
Filtration removes solids.
Recycling prepares coolant for reuse.
What central coolant recycling does
A central coolant recycling system processes fluid for multiple machines from one station. In the normal C.R.O.S.S. workflow, dirty coolant is removed from individual reservoirs with a Green Machine sump cleaner or another portable device and delivered to the system. Tramp oil and particulate are removed, coolant concentration is corrected, and clean coolant is stored for immediate use.
C.R.O.S.S. keeps clean coolant available 24/7/365, so operators do not wait for a newly delivered batch to finish processing. Clean coolant can be collected at the system or distributed across the facility through the optional Coolant Return System.
Filtration removes suspended solids. Recycling also separates tramp oil and prepares coolant for reuse. Automatic replenishment mixes concentrate and water at the required concentration, keeping additional coolant ready for use as fluid is lost through evaporation, carryout, or normal operation.
Coolant recycling extends beyond particulate filtration
Particulate filtration is one part of coolant management. Tramp oil, concentration drift, and bacterial growth also shorten coolant life and require additional control.
Keeps coolant clean
Bag filters, paper beds, magnetic separators, and cartridges remove particulate from the fluid. C.R.O.S.S. incorporates particulate filtration as part of the recycling process.
- Removes suspended solids
- Particulate-only filtration does not separate tramp oil
- Particulate-only filtration does not correct concentration
- Addresses the solid-contaminant load
Prepares coolant for reuse
Adds tramp-oil separation and concentration control to particulate filtration, allowing the coolant to remain within its working range longer.
- Removes solids and separates tramp oil
- Mixes concentrate and water at the required concentration
- Removes tramp oil that can support bacterial growth
- Extends coolant life and reduces premature change-outs
Four operating effects of coolant contamination
A complete coolant-management program addresses particulate, tramp oil, concentration control, and the cost of repeated disposal and sump maintenance.
Particulate loadingFILTRATION
Chips, fines, grinding swarf, and cast-iron sludge can affect tooling, pumps, nozzles, and surface finish. Paper-bed, magnetic, and bag filtration remove these solids.
Oil contaminationCOALESCING SEPARATION
Way lubricant, hydraulic oil, and spindle oil can float, disperse, or become loosely emulsified in coolant. These contaminants support bacterial growth and premature coolant degradation. C.R.O.S.S. removes 99.75% of tramp oil and particulate by volume.
Concentration controlAUTOMATIC REPLENISHMENT
Evaporation, carryout, and inconsistent top-off practices can move coolant outside its specified concentration range. Automatic replenishment mixes concentrate and water at the required concentration so additional coolant is ready for use.
Operating workloadFLUID MANAGEMENT
Premature change-outs increase fluid purchases, disposal volume, sump-cleaning labor, and production interruptions. Persistent bacterial growth can also drive odor complaints and repeated biocide additions.
Central recycling addresses these conditions through particulate filtration, tramp-oil separation, concentration control, and clean-coolant storage. The result is longer coolant life, lower disposal volume, and less manual fluid-management work across the shop.
The coolant recycling process
C.R.O.S.S. combines coolant collection, particulate filtration, tramp-oil separation, optional bacteria control, concentration correction, and clean-coolant storage at one central station.
Coolant collection
Central processingDirty coolant to the station
A Green Machine sump cleaner or another portable device normally removes dirty coolant from individual reservoirs and delivers it to C.R.O.S.S. A fully piped dirty-return arrangement can also be evaluated where appropriate.
Solids removed
Filtration removes particulate before the coolant moves through the remaining recycling functions. The filtration configuration is selected for the fluid, solids load, required flow, and cleanliness target.
Coalescing separation
Coalescing media and gravity separate free and mechanically dispersed tramp oil. Combined with particulate filtration, C.R.O.S.S. removes 99.75% of tramp oil and particulate by volume.
Optional ozone
Optional ozone automates bacteria control so the shop does not have to keep adding biocide. It also helps neutralize persistent coolant odors.
Remaining fines removed
A final filtration stage removes remaining particulate at the level specified for the C.R.O.S.S. application.
Clean coolant ready for use
Automatic replenishment mixes concentrate and water at the required concentration. C.R.O.S.S. maintains clean coolant for immediate use 24/7/365 at 99% or greater uptime. The optional CRS can distribute clean coolant through facility piping.
Collection and clean-coolant distribution
C.R.O.S.S. is the central recycling station. Dirty coolant collection and clean-coolant distribution are configured around the facility layout, machine count, and operating workflow.
- Optional clean distribution
Coolant Return System
The optional CRS pumps clean coolant through facility piping to distribution points across the shop, providing clean-coolant access beyond the central station.
Review system roles below - Normal dirty-coolant workflow
Portable collection
A Green Machine sump cleaner or another portable device removes dirty coolant from individual reservoirs and delivers it to C.R.O.S.S. Clean coolant is available immediately from the system without waiting for that batch to finish processing.
Portable collection workflow → - Combined arrangement
Portable collection with CRS
Dirty coolant is collected with portable equipment while the optional CRS distributes clean coolant through facility piping. This arrangement combines flexible collection with convenient clean-coolant access.
Combined workflow →
What determines the configuration
Fluid volume, coolant condition, facility layout, utilities, and transfer method determine the appropriate model and system configuration.
Confirm how dirty coolant will reach C.R.O.S.S. and whether clean coolant will be collected at the system or distributed through the optional CRS. Facility layout and machine locations guide that decision.
C.R.O.S.S. 250 and 450 models use single-phase power, while the 850 and larger models use three-phase power. Available voltage and phase are confirmed during system configuration.
Floor-space and tank requirements depend on flow rate, coolant volume, and the rate at which dirty coolant is delivered to the system. The C.R.O.S.S. line extends from the 250 through the 2200.
An engineer reviews the fluid type, chemistry, contaminants, and process requirements to confirm compatibility for the proposed application. Request an application review →
A water supply supports automatic mixing of concentrate and water at the required concentration. Electrical and facility connection requirements are confirmed for the selected model. Request an application review →
C.R.O.S.S. model line
| Model | Flow rate | Dirty tank | Clean tank |
|---|---|---|---|
| 250 | 2 GPM | 130 gal | 120 gal |
| 450 | 5 GPM | 250 gal | 200 gal |
| 850 | 10 GPM | 450 gal | 400 gal |
| 1200 | 15 GPM | 600 gal | 600 gal |
| 1600 | 15 GPM | 800 gal | 800 gal |
| 2200 | 25 GPM | 1,100 gal | 1,100 gal |
When a central coolant filtration system fits the operation
A central system serves multiple machine reservoirs from one recycling station. Coolant volume, contaminant load, transfer workflow, available space, and current fluid-management costs determine the appropriate configuration.
- Central coolant recycling
Multiple reservoirs, one clean-coolant source
C.R.O.S.S. accepts dirty coolant collected from individual reservoirs, processes it at one central station, and maintains clean coolant for immediate use 24/7/365.
View C.R.O.S.S. → - Reservoir-level equipment
Individual sumps and reservoirs
T.O.S.S. serves individual CNC sumps, larger reservoirs, pits, and parts washers when tramp-oil separation is needed at the reservoir rather than through a central recycling workflow.
Compare system scope →
What a central recycling system delivers
Actual results depend on the coolant, contaminant load, operating schedule, and current fluid-management practices.
Selection and ownership considerations
How does shop size affect system selection?
Machine count, coolant volume, contamination load, and current fluid-management costs determine whether C.R.O.S.S. is the right fit. Smaller operations may be better served by individual-reservoir equipment such as T.O.S.S. or the Green Machine. Request an application review →
We already have filtration. What does recycling add?
Filtration removes solids. C.R.O.S.S. also separates tramp oil, supports concentration control, and stores clean coolant for reuse across the shop. View C.R.O.S.S. →
Will it work with our fluid?
Compatibility depends on the fluid chemistry, contamination, and process. Provide the coolant and process information for application-specific review. Request an application review →
How is the financial case evaluated?
Compare current fluid purchases, disposal costs, and relevant labor with the projected reductions and quoted system investment. Estimate the savings →
Common central coolant-recycling questions
What is the difference between coolant filtration and coolant recycling?
Filtration removes suspended solids. Recycling combines particulate filtration with tramp-oil separation and concentration control so coolant can remain in service longer.
If I install C.R.O.S.S., do I still need machine-side chip handling?
C.R.O.S.S. provides the central recycling function for coolant delivered from the shop. Machines may still require appropriate chip handling or process filtration at the source, depending on the machining operation and particulate load.
What does C.R.O.S.S. change for the shop?
Dirty coolant from individual reservoirs is processed at one central station. Clean coolant remains available for immediate use 24/7/365, and the optional CRS can distribute it through facility piping.
Does C.R.O.S.S. require a fully piped loop?
No. Dirty coolant is normally collected with a Green Machine sump cleaner or another portable device. Facility piping is used when the optional CRS distributes clean coolant, and a piped dirty-return arrangement can be evaluated where appropriate.
How is clean-coolant availability protected?
C.R.O.S.S. is designed to maintain clean coolant at 99% or greater system uptime. Its clean-coolant storage means operators do not wait for a newly delivered batch of dirty coolant to finish processing.
How much can central recycling extend fluid life?
Removing tramp oil and particulate while maintaining the required concentration can extend coolant life and reduce premature change-outs. The result depends on the fluid, contamination load, operating duty, and current management practices. Severely degraded coolant cannot always be recovered.
How can clean coolant reach different areas of the facility?
The optional Coolant Return System pumps clean coolant through facility piping for distribution across the shop. Without the CRS, clean coolant remains available at the C.R.O.S.S. station.
fluid purchases
removed, by volume
C.R.O.S.S. performance
C.R.O.S.S. removes 99.75% of tramp oil and particulate by volume. It can reduce new-fluid purchases by up to 85% and disposal costs by up to 90%.
Actual reductions depend on the coolant, contamination load, operating schedule, and current fluid-management practices. An application review confirms system fit and establishes the basis for a quotation.
Continue your evaluation
Identify the appropriate recycling configuration.
Estimate the savings, review the C.R.O.S.S. system, or discuss the application with an EdjeTech engineer.