Installation, Operation and Maintenance Manual – FMA 3000
Ref: 3000/T/6/VH
12
5. –FMA-3000 OPERATION
Water enters the filter through the roughing chamber, which works like a stone trap
where any coarse particles are retained.
The water flows outwards through the FINE MESH, thus producing SURFACE
MECHANICAL FILTRATION. High quality water is then obtained according to the degree
of filtration chosen for the filter mesh, which can vary from 100 to 2,000 microns.
Dirt is retained and accumulated on the inner surface of the fine mesh, while causing a
gradual pressure drop between inlet and outlet of the filter. A differential pressure switch
will trigger the washing sequence when a DP equal to 0.3 bar (3 m.c.a.) is reached.
There are other possibilities to carry out the filter wash, namely wash by time, and
manual wash option.
When the differential pressure switch indicates 0.3 bar, the drain valve is commanded to
open, thus generating a differential pressure between the outside (atmospheric pressure)
and the inside of the filter (work pressure) so that a current of water at high speed is
produced, which goes through the mesh and is led to the outside through the inner hole
of the nozzles. The rotational motion is generated by this same flow passing through the
hydraulic motor located inside the cleaning chamber, while the longitudinal motion is
generated by the hydraulic piston located at the top of the filter.
The result of these joint actions is the suction effect of the nozzles onto the dirt on the
mesh, and the spiral movement of the suction scanner inside the filter.
During the self-cleaning process, which lasts 20 seconds, water continues to be filtered
and flowing into the system or application. This is due to the design of these filters, which
allows the consumption of water for washing to be MINIMAL and the duty cycle to be
CONTINUOUS.
Summary of Contents for FMA-3000
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