Keeping environmentally safe hydraulic fluids in their place
By M. F. Wangsgaard
Vegetable oils eliminate some environmental concerns, but water contamination from them (or other fluids) attacks urethane seals. A new urethane material solves th...
Insoluble contaminants can go undetected using conventional fluid analysis techniques. They are submicronic in size, so they can easily pass through filters and haunt hydraulic systems with a variety of problems.
Disposal of used hydraulic oil has always been a problem, but the introduction of new synthetic oils has complicated the picture even more. Users seem to be confused about which oils can be reclaimed and most importantly, how to reclaim them