Nas 6 Filter
Overview
Product sourcing insights & recommendations


The phrase 'NAS 6 filter' refers to industrial filtration systems designed to achieve Class 6 cleanliness according to the NAS 1638 standard. This level of purity is critical for high-performance hydraulic and lubrication systems in the aerospace, automotive, and power generation industries. OilsafeLubefix
Technical Breakdown: What is NAS 6?
NAS 1638 Class 6 is a strict contamination standard that limits the number of particles in a 100 ml fluid sample. To be certified as NAS 6, the fluid must not exceed specific counts across five size ranges: Lubefix
| Particle Size (µm) | Max Particles / 100ml |
|---|---|
| 5 to 15 | 16,000 |
| 15 to 25 | 2,850 |
| 25 to 50 | 506 |
| 50 to 100 | 90 |
| > 100 | 16 |
While NAS 1638 is largely superseded by ISO 4406, it remains a common reference in technical specs. A NAS 6 rating typically corresponds to an ISO 4406 code of approximately 15/12 (or 17/15/12). OilsafeFluidlife
Product & Market Trends
* Growing Demand for Portable Solutions: There is a rising market for portable oil filtration machines (also known as "filter carts") that can achieve NAS 6 cleanliness on-site during oil changes or flushing. IndiamartLubefix
* Shift to High-Efficiency Media: Modern NAS 6 filters use advanced glass fiber or microfiltration media (typically 3-micron or smaller) to capture fine silt particles that cause premature wear in hydraulic components. Lubefix
* Market Growth: The broader Network Attached Storage (NAS) market—though a different category—shows a CAGR of ~14.8%, reflecting a global industrial trend toward digitalized, automated condition monitoring and data-driven maintenance. Snsinsider
B2B Sourcing Context
Current B2B offerings for NAS 6 compliant filtration systems range from affordable industrial units starting around $100 to specialized high-capacity purifiers reaching $2,000+. AlibabaAlibaba
Hydraulic Oil Filtration System Nas 1638 Class 6
Products · 2 lists

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Sources & References
25 sources cited · Verified industry data & reports

CONTAMINATION CONTROL SOLUTIONS
MP Filtri
The NAS system was originally developed in 1964 to define contamination classes for the contamination contained within aircraft components.

Portable Oil Filtration Machine with moisture removal for ...
IndiaMART
Portable Oil Filtration Machine with moisture removal for NAS 6/7 cleanliness. Microfiltration Solutions. Bhugaon, Pune. ₹ 1,20,000.
https://www.machinerylubrication.com/Read/29465/un...
Machinery Lubrication Magazine
No information is available for this page.

Guide to Contamination Standards
Parker US
The HFDE Hydraulic and heavy duty filtration and fluid condition monitoring catalogue contains, over 460 full colour pages, extensive product technical ...

NAS 1638 / ISO 4406
Oilsafe srl
Standard NAS 1638 has been developed in order to define the levels of contamination in the aerospace sector. Standard NAS 1638 has been replaced by standard ...

Advanced Fluid Conditioning Solutions® Hydraulic & Lube ...
Schroeder Industries
Product offerings include: ♦ High Pressure Filters (1,500-6,500 psi) ♦ Suction Filters ♦ Medium Pressure Filters (500-1,500 psi) ♦ Manifold Cartridge Kits & ...
