Examples of wear [page 4 of 'ferrous particle problem']
This page contains some examples of modern fluid systems.
It shows the locations at which wear occurs and the typical dynamic tolerances we need to consider when trying to filter ‘dangerous’ ferrous particles to stop the chain reaction of wear.
Gear Pump
Dynamic Clearance Tooth to side plate: 0.5 - 5 microns
Tooth tip to case: 0.5 - 5 microns
Vane Pump
Dynamic clearance vane sides: 5 - 13 microns
Dynamic clearance vane tip: 0.5 - 1 microns
Piston Pump
Dynamic clearance piston to bore: 5 - 40 microns
Dynamic clearance valve plate to cylinder: 0.5 - 5 microns
Typical Valve
Dynamic Clearance 2 - 20 microns