Why does sub-micron purification matter?
The vast majority of particles, including the stickiest oxide insolubles and the hardest sub-micron particles pass unhindered through the finest filters. The finest traditional filters that can be practically used in high flow industrial applications is a 3 to 5 micron filter. These filters are good at removing larger “sticks and stones” that can cause immediate damage. They are helpless against the particles that build and grow to cause long-term machine wear. As example, a typical servo valve has a 1-4 micron clearance between the spool and sleeve. A typical roller bearing has a clearance between 0.1 to 3 microns. Fine filters are helpless at defending these critical components from contamination.
