Tell Tale Hydraulic Filters

This is a versatile filter, which can be directly welded into a reservoir’s suction and return line or conversely installed in pipes with a maximum pressure of 10 kg/cm2 (142 psi). This filter can remove particles as small as 3 u. It consists of an indicating element, which indicates the time when cleaning is required. That is why this filter is referred to as a telltale filter (Figure 7.8).


The operation of a tell-tale filter is dependent on the fluid passing through the porous media, which traps the contaminants. The tell-tale indicator monitors the pressure differential buildup due to dirt, which gives an indication of the condition of the filter element.

One Reply to “Tell Tale Hydraulic Filters”

  1. Long, long time ago ( in the sixties?), I was working with the Dutch hydraulic company Hydraudyne /Boxtel.
    We where representing TellTale filters for quote some years.
    I came across the word tell tale in the book Ulysses by James Joyce when he is discribing the eyes of a pretty girl.
    And that brought back good memories.
    Jan Zwanenberg

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