A low maintenance filter, series FN1 eliminates the need for element
replacement. SMC's unique element construction is composed of a series
of grooved filter plates and wave washers placed one above the other.
When compressed, the gaps between the filter plates and wave washers
filter foreign matter. When decompressed, the element widens the gap
between the filter plates and wave washers, allowing dust and foreign
particles caught between the plates to be washed away. The gaps between
the filter plates are equally maintained by the wave washers to allow
stable back-flush operation.
