Filter aids green fluid recycling

The Series FN1 filter is designed for machine tool and general machinery industries.

The Series FN1 filter is designed for machine tool and general machinery industries.

With a unique patented element design and back-flush feature, the Series FN1 filter from SMC, generates no industrial waste, as there are no replaceable filter elements, thus saving the cost of filter elements and maintenance, and helping users meet the ISO14001 standard.

The element of the FN1 filter is constructed of a series of grooved filter plates and wave washers placed one above the other and compressed by a compact cylinder on the top of the filter.

When the element is compressed, foreign matter in the fluid is trapped in between the plates and washers.

Decompressing the element allow the foreign matter to be back flushed and washed away for collection, eliminating the need for element replacement and providing a low maintenance operating regime.

Recompressing continues normal operation.

The process of filtration and back flushing cycle can be carried out manually or automatically.

The control circuit for the cycle operation can be built using a totally pneumatic or electropneumatic circuit, for which SMC provides the required pneumatic components.

In automatic operation, a differential pressure switch indicates filter element clogging.

The FN1 series filter operates in tandem with the FNR reservoir, which stores the fluid required for back flushing, and FND dust recovery filter for collecting the debris.

All three units are primarily constructed of stainless steel SUS304 and form an integrated circuit for industrial waste removal.

The filter is compatible with water (industrial and distilled), water-soluble and oil based coolants: petroleum (oil, kerosene and xylene) and ammonia hydroxide, sodium hydroxide and alkalis.

Seal material is available as either nitrile rubber or fluoro rubber to suit the application.

The filter element is available in two types: cylindrical and step type.

The cylindrical type has a smooth peripheral surface, as the dimensions of the filter plate and wave washer are the same.

The element is ideal for filtering fluids that contain dust with same particle size, as it provides a larger filtration area and easier dust separation.

The step type element has an uneven (stepped) surface, as the dimensions of the filter plate are smaller than those of the wave washer, and is recommended for fluids containing dust particles with large variance in size.

Element lengths are either 250 or 500mm with respective flow rates of 40 and 80 litre/min (at 20-micron filtration).

Compatible reservoirs have tank capacity of either 1.1 or 1.8 litre.

Maximum operating pressure of the filter is 1.0MPa and maximum fluid temperature is 80C.

For larger flow rates SMC also offers a 200 litre/min filter as a special, and also the standard filters can be mounted in parallel.

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