Ruptured Filter in Hydraulic System

or the PRV has been messed with / invalidated. Why would the filter burst before the PRV opens? maybe the circuit is incorrectly designed...?

Greetings,

It is usually pretty rare to see filters burst. Most filters have a bypass. I would be curious to see if perhaps there is a restriction downstream of the bursting filter. Something must be allowing pressure to build to the point where the filter is the weak link. Theoretically there should be little or no back pressure on the return line. I would dissemble those parts of the system and investigate.

Good luck.

Hello,

You would need to let me see the circuit diagram to give a positive response but I suspect it is decompression shock. If you can describe or send the circuit I can be more precise. ie what valves etc. are between the motor and the filter, line sizes, lengths etc.

Oliver Dunthorne

A system pressure of 250Bar is usually enough to rupture miost of the filters.

However check up what is the collapsing pressure you have specified for the elements.

The cause of rupture is invariably contamination. (BTW, I have seen quite a few and all were due to it)

The less probable are wrong rating, air bubble entrapment, lowe temperature (hence higher visocity) etc.

Usually we put a DP (differential pressure) sensor across the filter - do you have it? if not get one. My equipments usually goes down because the customers run the machines with collapsed elements.

Find the root of contamination and arrest it.

If possible, get the oil changed/ cleaned to the recommended ISO level.

Did you change the original filter for a cheaper or smaller one? Have it a metallic mesh? did you analize the possible rests on its mesh?.-