Fineness Comparision According to NAS 1638 and ISO 4406 : 99

 

Fineness Comparision and Recommended Filter Media of Hytech

Application Recommended Class According to NAS 1638 Recommended Class According to ISO 4406 : 99 Recommended Filter Media of Hytech
Sensitive Systems. 2-3 16/12/8 1GF
Sensitive Systems. (Aviation) 3-4 17/13/8 3GF
Servo systems 4-6 19/15/11 6GF
Hydraulics with High Operating Safety 7-8 20/16/13 10GF
Medium-Pressure Systems 7-9 22/18/14 16GF
Low-Pressure & Mobile Hydraulics 9-11 23/19/15 20GF