Dirt and water are the main disruptive factors for perfect operation of the hydraulic
system. the consequences of insufficient filtering can lead to serious damage.
Hydraulic systems function perfectly when they are free of dirt particles and water. OEM
flters and flter cartridges ensure exactly that.
How contamination occurs and what consequences this has can be seen here. Many
types of contamination cannot be seen by the naked eye!
SOURCES OF CONTAMINATION
Production
• dust
• production residues
• anti-corrosive agents
• cleaning agent residues
Machine operation
• dust in the working environment
• metallic wear
seal abrasion
• chemical corrosion
• oil aging products
• oil-insoluble substances due to oil mixing
Surrounding air at
• piston rods
• labyrinth seals
• ventilation
Re-flled oil
EFFECTS OF CONTAMINATION
Solid particles are the cause of
• wear of components
• failure of components
• limited availability
Fluid contamination (usually free
or dissolved water) is the cause of
• corrosion, wear
• impedance of the viscosity
• chemical reaction with fluid
• influence on lubrication properties
• oil aging, oil oxidation
poorer flterability
• diesel effect (cavitation), acceleration
of oil aging due to formation of steam
bubbles
Gaseous contamination (air)
is the cause of
• inaccurate response behavior of valves
• energy losses
• pump damage
• foaming
• chemical reaction with fluid
oxidation