Penetrant inspection (FPI/NDI) lines can generate many gallons of regulated wastewater every day — a mix of penetrant chemistry, emulsifiers, and rinse water that should not simply go down the drain. At costs that can range from $1.00–$3.00 per gallon for hauling and offsite disposal, a facility running 30 GPD pays $21,000–$42,000 per year - before any disposal fees or fines. SEPARATION DYNAMICS builds the system that can drop your ongoing wastewater cost by 95% or more.
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95%+ Waste Reduction Dramatically cut disposal costs and hauling fees |
No Chemical Cleaning Swap filters in minutes — no downtime, no extra waste |
12–18 Month Payback Documented ROI — after payback, every year is pure savings |
Tell us about your FPI line and we'll show you performance data on similar penetrant chemistry, a right-sized system recommendation, and a documented payback analysis — all before you commit to anything.
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Most Membrane Systems Were Not Designed for Penetrant Wastewater. EXTRAN™ Was. EXTRAN™ uses a proprietary regenerated cellulose hollow fiber membrane — the only membrane purpose-built for the oil-emulsion chemistry of penetrant inspection wastewater. Unlike conventional polymer UF systems or ceramic membranes that foul rapidly in oil-laden water, EXTRAN™ resists oil fouling by design. After a long period in operation, when flow eventually declines the modules are simply replaced in minutes. No chemicals. No cleaning protocol. No additional waste stream. |
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Tell us about your process A brief conversation or complete our process questionnaire. We ask about your penetrant chemistry, daily volume, rinse method, and discharge or re-use goals. No sample required – in most cases we already have the data. |
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We match you to existing data We have run every major penetrant chemistry in use today — Magnaflux, Sherwin, Ardrox, Turboline, and others — and have analytical lab data on the results. In the vast majority of cases, we can show you performance data on water just like yours before you commit to anything. |
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You get a right-sized proposal You receive a detailed proposal with your system recommendation, operating costs, annual savings, and a documented payback period specific to your facility's volume and current disposal costs. If your process is unusual or you want validation on your specific water, we'll run your sample free of charge — but for most operations, we already have what we need. |
Compliance is handled. The hauling truck stops coming. The system runs with minimal operator input. The NDT team just does NDT.
Need more certainty? We'll run your specific wastewater sample at no charge and provide third-party analytical results before you make any commitment.Click here to submit an inquiry
Find the Right System for Your Operation
SEPARATION DYNAMICS offers a complete range of EXTRAN™ ultrafiltration systems — from compact units for small shops to large multi-module systems for high-volume aerospace MRO lines. All systems handle all penetrant chemistries with no membrane cleaning required.
| EUS-M | EUS-E | EUS-I | EUS-D | |
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| Capacity: | 10–25 GPD | 30–120 GPD | 50–600 GPD | 1,000–8,000 GPD |
| Configuration: | Compact UF + carbon polish | UF + dual carbon polish | UF + carbon + UV + chiller | Multi-module, scalable |
| Best For: | Low-volume / intermittent FPI. Small job shops, periodic inspections. | Small to mid-size MRO, aerospace suppliers. Direct Splitter™ replacement. | Broad range aerospace MRO. Full closed-loop recycling or discharge. | High-volume NDT lines. Large aerospace MRO and manufacturing facilities. |
| Output: | Discharge to sewer | Discharge to sewer | Recycle or discharge | Recycle or discharge |
All systems include EXTRAN™ ultrafiltration + activated carbon polishing. Recycling configurations (EUS-I and above) add UV sterilization, ozone, chiller, automatic freshwater make-up, and re-pressurization pump. Typical wastewater reduction: 95% or more.
The Splitter Series has been discontinued. The SEPARATION DYNAMICS EUS-M or EUS-E are the recommended direct replacement units — with EXTRAN™ membrane technology, no chemical cleaning, and full compatibility with all penetrant chemistries. Contact for a side-by-side comparison and upgrade pricing.
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Most SEPARATION DYNAMICS customers recover their full investment within 12–18 months, based entirely on substantial hauling and disposal cost savings. The figures below are drawn from actual operating cost analysis — not estimates. After payback, the savings continue indefinitely.
| System | System Price | Annual Savings | Payback Period | 5-Year Net Savings |
| EUS-M (15 GPD) | $25,000 | $18,500 / yr | ~16 months | $67,000 |
| EUS-E (30 GPD) | $40,000 | $38,700 / yr | ~12 months | $154,000 |
| EUS-I (120 GPD) | $75,000 | $50,200 / yr | ~18 months | $176,000 |
* Based on disposal costs of $1.00–$3.00/gallon. Actual savings depend on your current hauling rates and daily volume. Contact SDI to model your specific operation.
After payback, annual savings continue indefinitely. At $1.00–$3.00 per gallon for hauling, the math is straightforward. A facility running 75 GPD is spending $41,000–$82,000 per year before any disposal fees, fines or rate increases — all costs that will drop dramatically the day the system is commissioned.
Savings calculations are based on documented operating cost data. Results vary by facility volume, current disposal rates, and local regulatory requirements. Contact Separation Dynamics for a facility-specific analysis.
Separation Dynamics systems are installed and operating at major aerospace manufacturing and MRO facilities worldwide. Our systems clean and recycle water for some of the most quality-sensitive operations on earth — NDT professionals at these facilities don’t take technology risks.
"Year after year, the world’s leading MRO facilities for Wheels and Brakes and Aircraft Engines choose EXTRAN systems to handle their wastewater – if it works for them, it will work for your facility too."
— Mike Presley, President, SEPARATION DYNAMICS
