ISO 4406

These are the ISO 4046 cleanliness codes for oil particle count.  These tests are usually done with a laser particle count to measure the size of the micron as well as the quantities of particles per 1 ml of oil.

Pall Filters

This is my review about the company of Pall Filters.  Some of the world's largest hydraulic filter manufacturer, at least from my point of view.  Enjoy.

Off line filtration for hydraulics

If you ever wonder how to properly size an off line filtration unit to properly take care of your hydraulic machinery, then here is how you can do it and why an off line filtration system is one of the most efficient filters you can install.