Coolant Purification and KSS Filtration Systems
FRIESS coolant purification and KSS filtration systems remove tramp oil, free oil, metal fines and fine particles from cutting fluids, coolants and emulsions. Oil skimmers, magnetic filters and oil separators can be combined to extend fluid service life and reduce fluid-change and waste-disposal costs.
Key Advantages of FRIESS Coolant and KSS Filtration Systems
- No consumable filter media
- Robust and durable equipment
- Low maintenance and easy operation
FRIESS supplies robust KSS treatment systems as central installations or mobile decentralized units. Modular bypass or full-flow filtration can be combined into multi-stage treatment according to the contamination.
More Than 50 Years of FRIESS Process-Fluid Cleaning Experience | Made in Germany
FRIESS purification modules can be integrated flexibly into existing KSS systems. Whether mobile or stationary, they fit smoothly into production processes and help optimize operating costs, maintenance effort and process stability.
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Different separation technologies provide thorough coolant cleaning and effective regeneration. This helps protect the environment while reducing operating costs.
FRIESS Equipment Made in Germany: Robust, Durable, Easy to Operate and Low-Maintenance
Separates floating oil, removes particles and circulates coolant for purification. Its compact, mobile design is ideal for servicing multiple machine tools while helping extend coolant life and reduce fluid-change frequency.
Separates floating oil, removes particles and circulates coolant for purification. Its modular configuration supports higher treatment demands and helps maintain stable coolant quality in demanding machining operations.
Combines proven FRIESS 1U oil-skimming technology with continuous oil-water separation. It reliably discharges separated floating oil, helping keep coolant cleaner and reduce manual tank maintenance.
Removes iron, steel and other magnetizable particles from process fluids without filter media. High-intensity magnetic separation supports stable machining quality while reducing consumable and maintenance costs.
Continuously removes floating tramp oil from small emulsion, cleaning and degreasing tanks. Its compact design tolerates liquid-level fluctuations and fits easily into individual machine sumps.
Case Studies
Section 01 | Benefits of Coolant Filtration Systems
Continuous coolant purification can significantly extend sump-fluid service life while reducing the combined costs of waste-fluid disposal, fresh-fluid purchasing and contamination-related machining defects.
Reduce waste-fluid disposal costs
Transporting and disposing of spent coolant, including drilling emulsions, is expensive and increases the environmental burden. Continuous purification and regeneration reduce complete fluid-change frequency and waste-fluid volume.
Lower fresh-fluid purchasing costs
Longer fluid life reduces top-ups and complete sump changes, lowering long-term operating costs and resource consumption.
Avoid contamination-related machining defects
Continuous removal of metal fines and other contaminants reduces the risk of bore deviations, surface scratches, rework and scrap, helping to stabilize machining accuracy and finished-part quality.
Further advantages of FRIESS KSS filtration systems
- Less unplanned downtime caused by fluid changes;
- Stable workpiece quality and machining accuracy;
- Reduced particle-related wear on tools, pumps and machine components;
- Robust equipment that is easy to operate and requires little maintenance;
- Modular treatment of oils, metal particles and mineral contaminants;
- Core separation processes that require no filter cloth or similar consumables.
Section 02 | What Does Clean Coolant Require?
No two production sites require exactly the same KSS filtration system. Treatment capacity must match the sump volume, circulation rate and contamination load, while the separation process must be selected for the contaminants actually present.
Before system selection, determine the coolant properties, main contamination sources, particle type and size, tramp-oil content, target cleanliness, available installation space, and whether bypass or full-flow treatment is required.
FRIESS can assess the operating conditions and recommend the appropriate mobile, decentralized or central treatment concept together with the necessary module combination.
Section 03 | Components of a KSS Filtration System
Reliable purification starts with an accurate understanding of the site conditions. After assessing fluid condition, contamination sources, treatment flow and installation constraints, FRIESS can plan, configure, install and commission the complete system.
Oil skimmers, magnetic filters and oil-water separators can be integrated as individual modules or combined into a complete KSS treatment system that balances purification performance, process reliability and economy.
Oil skimmers
Continuously remove tramp oil and other low-density liquid contaminants floating on the fluid surface.
Magnetic filters
Capture iron, steel and other magnetizable particles entering the coolant during machining without filter cloth.
Oil-water separators
Stabilize the flow in a bypass circuit, separate free oil and remove part of the sludge and solid contamination through settling or coalescence.
Section 04 | KSS Filtration System Manufacturer — FRIESS
FRIESS GmbH has more than 50 years of experience in coolant maintenance and process-fluid purification. The company supplies mobile, decentralized and central treatment modules for tramp oil, metal particles and other common contaminants.
FRIESS equipment is made in Germany using durable materials and reliable construction. Consumable-free or low-consumable separation technologies reduce long-term maintenance effort and are designed for continuous industrial operation.
Why choose FRIESS?
- Cost-effective system solutions supplied directly by the manufacturer;
- Individual configuration for the specific contamination problem and site conditions;
- Professional consultation with no obligation;
- Rental trials may be available depending on project conditions, allowing purification performance to be verified before purchase.
Section 05 | Mobile KSS Purification
Mobile coolant purification provides greater flexibility when several machine tools require periodic treatment or when installing a fixed unit at every sump is impractical.
Many FRIESS coolant-treatment units can be configured as mobile systems and moved between machine tools, tanks or production areas as needed. One unit can serve several operating points according to a maintenance schedule, making it especially suitable for decentralized production sites.
Once moved to a new treatment point, the unit can be placed into service in only a few steps. The pump type, treatment flow and module combination should be selected for the actual operating conditions.
Section 06 | FAQ: Contaminants, Applications and Testing
Which contaminants are commonly found in coolant?
Metalworking processes introduce metal fines and small particles. Machine-way oil and hydraulic oil create tramp-oil contamination, while mineral, chemical or microbial contamination may also occur depending on the production environment.
Where are coolants used?
Coolants are used primarily in cutting, grinding and drilling operations for cooling, lubrication, chip removal and corrosion protection. Without effective cooling and lubrication, heat and friction accelerate tool and equipment wear and reduce surface quality and dimensional accuracy.
Which condition parameters should be monitored?
Coolant quality should be checked continuously. In addition to contamination, concentration, pH, nitrite and microbiological condition should be recorded according to the fluid and production requirements.
Section 07 | Why Must Coolants Be Filtered?
Unpurified coolant accelerates wear on tools, pumps, valves and machine components. It can also reduce workpiece quality and, in severe cases, damage equipment or finished parts.
Filtration and separation significantly extend coolant service life while reducing fresh-fluid purchasing, complete sump changes and waste-disposal costs. More stable fluid condition also lowers the risk of machining defects, rework, odours and microbial growth.
Longer tool and equipment life, fewer unplanned stoppages and more consistent production quality further reduce the total cost of manufacturing.
Section 08 | Which Equipment Is Needed for Coolant Maintenance?
There is no single coolant-maintenance machine suitable for every production site. First identify the contaminants, contamination load and target cleanliness, then select the appropriate treatment method.
Magnetic filtration
High-intensity magnetic filters capture iron, steel and other magnetizable fines without the pore-size limitations of conventional filter cloth and without filter-media consumption. Units can be mobile or stationary and used in bypass or full-flow filtration.
Oil skimmers
When tramp oil is less dense than the coolant and floats on the surface, an oil skimmer can remove it continuously. Tube-type skimmers accommodate a range of fluid-level fluctuations and suit both individual machine sumps and larger central systems.
Oil-water separators
When oil droplets do not rise reliably in the sump, or when free oil, settled sludge and other contaminants occur together, bypass treatment can combine flow stabilization, settling and coalescence.
Filter cloth or mechanical prefiltration
Filter cloth captures larger solid particles by pore size. It does not effectively remove floating oil or separate contaminants selectively, and the used cloth must be replaced and disposed of. It is therefore generally best used as prefiltration.
FRIESS magnetic filtration, oil skimming and oil-water separation can be used independently or combined into a complete system, reducing reliance on consumable filter media.
In addition to reducing operating costs, FRIESS oil skimmers、electrostatic oil cleaners、magnetic filters、coolant purification systems、oil-water separators and vacuum oil dehydrators help extend process-fluid life, reduce equipment wear and improve production stability.
Contact us for a purification solution tailored to your operating conditions.