Fluid Filtration Solutions and Fluid Recycling Equipment

Yes. PRAB offers fully customized solutions engineered to meet the unique challenges of each facility’s scrap handling, fluid recycling, and wastewater treatment needs. Every manufacturer generates different waste streams and operates under specific production requirements, making customized system design essential for efficiency, compliance, and long-term reliability.

How PRAB Delivers Customized Solutions

• Application Engineering: PRAB’s team evaluates your scrap type, coolant chemistry, wastewater composition, production flow, and space constraints to design a tailored solution rather than a one-size-fits-all system.
• Lab Testing & Pilot Programs: Before system design, PRAB can run lab tests and pilot trials on actual customer samples to verify treatment effectiveness and optimize system sizing. This ensures regulatory compliance and performance validation.
• Modular & Integrated Systems: PRAB designs systems that integrate multiple processes—such as metal chip shredding, fluid filtration, and automated pH adjustment—into one continuous, automated line. This maximizes uptime and reduces manual handling.
• Scalability: Systems can be scaled to handle anything from small CNC shops to large, multi-line manufacturing plants, with future expansion considered during design.
• Compliance by Design: Customized solutions are engineered to meet federal, state, and local environmental regulations, ensuring facilities pass audits and avoid costly violations.

Examples of PRAB Customization

• Metal Scrap Conveyors: Custom-built to handle abrasive, hot, or wet scrap, including specialized options like Pivot Belt Conveyors and Roller Bucket Conveyors for die-casting and foundry applications.
• Fluid Recycling Systems: Configured with Ultrafiltration, Centrifuges, or Paper Bed Filters depending on coolant type and particle load.
• Wastewater Treatment: Automated pH Adjustment, Oil-Water Separators, and Vacuum Evaporation units are configured based on site-specific discharge permits.

Customer Value:
Customized solutions from PRAB help manufacturers:

• Increase metal scrap value and reclaim coolants.
• Reduce energy and disposal costs.
• Improve worker safety and plant cleanliness.
• Extend equipment life with integrated, automated systems.
• Achieve long-term sustainability and environmental compliance.

👉 Learn more about PRAB’s engineered systems here.

Membrane, paper bed, and magnetic filtration improve coolant quality, extend tool life, and reduce waste.

Coolant filtration removes solids, tramp oils, and bacteria, thereby protecting machine tools and extending the life of the coolant. PRAB offers a range of fluid filtration methods, including paper bed filters, membrane systems, magnetic separators, and hydrocyclones, each engineered for different contaminant loads and flow rates.

Explore PRAB Filtration Technologies
Paper Bed Filter Options

Key Benefits:

• Paper bed filters for particulate removal
• Membrane filtration for micro-contaminants and oils
• Magnetic separators for ferrous fines
• Cartridge and bag filters for polishing
• Centrifuges for high-volume bulk cleaning

Q: What is the best filter system for CNC applications?

A: Paper bed and membrane filtration systems are commonly used in CNC operations.

Q: Can filtration eliminate bacterial growth?

A: It reduces microbial activity, especially when paired with regular coolant monitoring and control systems.

Removing tramp oil extends coolant life by 2–5x, reduces tool wear, odors, and prevents bacterial growth.

Tramp oils are unwanted machine lubricants that leak into coolant sumps, causing fluid degradation and contamination. PRAB tramp oil separators—such as coalescing units and belt skimmers—efficiently remove free-floating and emulsified oils. This helps maintain fluid integrity and reduces the frequency of coolant replacement.

White Paper: Extending Tool Life Through Effective Fluid Management

Case Study: Tramp Oil Separator Extends Washwater Life

Benefits:

• • Improves tool life and part finish by keeping the fluid cleaner
  • Reduces bacterial growth and odor in coolant tanks
  • Minimizes smog and mist from emulsified oils
  • Prevents sticky residue and downstream equipment fouling
  • Extends coolant life by up to 3× in many facilities

Q: What types of tramp oil can be removed?

A: Floating, mechanically entrained, and lightly emulsified oils can be removed with coalescing or skimming technology.

Q: How often should tramp oil be removed?

A: Ideally, tramp oil should be removed daily or continuously using automated systems.

The most effective coolant filtration methods include magnetic separation, paper bed filtration, and membrane-based systems. Each approach targets different types of contaminants to extend coolant life, improve surface finish, and reduce tool wear.

• Magnetic separators capture ferrous solids and fines.
• Paper bed filters are effective for removing larger chips and non-ferrous solids.
• Membrane systems (such as ultrafiltration) remove fine particulates and emulsified oils.

The right choice depends on the coolant type, machining process, and contaminant load. In many cases, facilities combine multiple technologies for optimal performance and compliance with discharge regulations.

PRAB Fluid Filtration and Coolant Recycling Systems are engineered for CNC machining, metal cutting, and grinding operations. With solutions that include magnetic separators, paper bed filters, vacuum filters, and ultrafiltration units, PRAB helps manufacturers lower coolant costs, reduce downtime, and meet environmental standards.

White Paper: Extending Tool Life Through Effective Fluid Management

Case Study: Aerospace Components Manufacturer Turns Waste into Revenue

• Benefits:
  • Magnetic separators remove ferrous particles before fine filtration
  • Paper bed filters handle solids and fines at lower flow rates
  • Vacuum filtration is ideal for grinding and honing operations
  • Centrifuges separate solids using high-speed rotation
  • Membrane filtration removes sub-micron particles and tramp oils

Q: Which method is best for high-precision machining?

A: Membrane and vacuum filtration systems are ideal for removing sub-micron particulates in precision processes.

Q: How often should filters be replaced?

A: This depends on the system design and contaminant load. Some systems include auto-monitoring to optimize replacement intervals.

Centralized systems reduce coolant costs, extend tool life, and simplify shop-wide fluid maintenance.

A centralized coolant filtration system like PRAB’s Guardian™ series filters, conditions, and recycles coolant from a central location, eliminating redundant equipment and fluid waste. It ensures consistent fluid performance, reduces overall usage, and automates much of the fluid maintenance routine.

White Paper: Centralized Coolant Recycling System Improves Tool Life and Reduces Costs

Case Study: Ogura Reduces Coolant Use by 66%

Case Study: Guardian™ Coolant System with Crusher/Wringer

Case Study: Aerospace Facility Cuts Coolant Purchases by 75%

• Benefits:
  • Reduces labor needed for individual sump cleaning
  • Maintains consistent coolant quality across multiple machines
  • Improves part finish and tool longevity
  • Decreases disposal volume and chemical usage
  • Simplifies compliance with ISO 14001 and POTW discharge limits

Q: Is a centralized system right for small job shops?

A: PRAB has several options for small job shops; centralized systems are best for facilities with 5+ machines or continuous operations.

Q: What ROI can I expect?

A: Typical users report coolant savings of 50–75% and improved tooling performance.

Coolant recycling reduces hazardous waste, supports ISO 14001, and cuts chemical and water use.

Coolant recycling supports environmental objectives while boosting operational efficiency. PRAB systems help meet strict compliance goals by minimizing waste discharge, eliminating tramp oil, and enabling fluid reuse, saving both money and natural resources.

ZLD and Environmental Compliance Guide
Coolant Reclaim System Overview

• Key Benefits:
  • Achieve Zero Liquid Discharge (ZLD)
  • Reduce chemical disposal and fresh fluid purchases
  • Meet EPA, POTW, and ISO 14001 guidelines
  • Decrease haul-away and wastewater treatment costs

Q: Does coolant recycling qualify for green certifications?

A: Yes. Many clients use PRAB systems to help achieve ISO 14001 certification.

Q: How often should metalworking fluids be tested and monitored?

A: Regular monitoring of metalworking fluids is recommended every week for pH, concentration, and contamination levels, with comprehensive testing performed monthly.

Zero Liquid Discharge (ZLD) systems prevent any liquid waste from leaving a facility. This treatment approach recovers and reuses water from process fluids, coolants, and wastewater streams—helping manufacturers meet strict environmental regulations, reduce operating costs, and achieve sustainability goals while avoiding costly discharge violations.

PRAB provides complete ZLD solutions, including vacuum evaporators, ultrafiltration, and reverse osmosis systems. These technologies recover high-purity water from spent coolants and process fluids for reuse in production, minimizing freshwater demand and eliminating discharge-related risks. Explore related resources:

White Paper: Closed-Loop Wastewater Recycling

Case Study: Battery Recycler Achieves ZLD with PRAB Solutions

Benefits of PRAB Zero Liquid Discharge (ZLD) systems:

• Eliminates wastewater disposal by recovering up to 99% as reusable distillate
• Supports ISO 14001 and EPA compliance for discharge limits
• Reduces haul-away volumes and chemical treatment costs
• Enables closed-loop reuse of treated coolant or process water
• Ideal for water-scarce regions or facilities with high discharge surcharges

Q: Does ZLD make financial sense?

A: Yes. In many cases, ROI is achieved in 12–24 months by reducing disposal and chemical costs.