Series FN1 filter

SMC's low maintenance filter Series FN1 has a unique element design with back flush feature, to avoid generation of industrial waste and eliminates the need to replace the filter element.

FN1 filter is Ideal for use on OEM machines for cleaning the coolants, as well as for maintenance personnel use, to clean the dirty coolant in their factories without associated cost of replacement filter elements and disposal cost of used elements.

The FN1 filter has a unique filter element that is constructed of a series of grooved filter plates and wave washers stacked one over the other and compressed and held together by a pneumatic cylinder.

Currently there are two models of FN1, with flow capacity of 40l.min and 80l/min. available. A 200l/min filter is under development.

The FN1 filter has two types of filter elements. The cylindrical type with 5 and 20 micron filtration is suitable for filtering fluids containing dust particles of same size, The second type of element, the step type with 5-micron filtration rating is suitable when filtering fluids containing dust particles with great variance in sizes.

The filter can be used for filtering water, coolant, petroleum and alkali solutions by appropriate choosing the seal material between nitrile or fluoro rubber. SMC also supplies other accessories like reservoir tank Series FNR to store the fluid required to backflush the clogged element, and dust removal filter Series FND, to remove dust and foreign particles from the fluid after backflushing the element.

Please contact SMC, for customized filtration system for OEM applications or a portable filter caritas described below.

Brief description of the FN1 filter cart

The FN1 cart consists of FN1 with inlet/outlet valves, ball valve at the bottom of the FN1, Reservoir and Tank for dust removal filter and an Impeller type pump

The cart also has a control panel consisting of a PLC and related controls to perform the backwash operation of the FN1 for cleaning the dirty filter element stack.

The control panel consists of all safety measures, AUTO/ Manual mode.

In actual installation, the inlet hose of the pump is connected to the dirty coolant tank, which sucks the coolant and pumps through the FN1 and clean coolant is delivered to the clean tank.

When the filter element clogs, a differential pressure switch sends a signal for back wash operation. At this time, the inlet valve to FN1 is closed, the compact cylinder retracts to expand the filter element stack, and the reservoir valves opens to force the clean coolant (under air pressure) to back wash the filter element. During the backwash, the ball valve at the bottom of FN1 opens to drain the coolant with chips in to the dust removal filter tank.

Then the operation switches back to cleaning mode. How often backwash takes place depends on the dirt in the coolant. The back washing can also be synchronized with machine operation.

The filter cart is ideal for maintenance purposes in a factory. i.e. you can wheel in the cart to a particular machine, clean the coolant and move on to next machine.

Machine tool manufacturers, typically use bag filters or magnetic separators (which can not filter non magnetic chips like aluminum) which have to be replaced quite often, creating a problem with environmental issue and making it expensive to dispose of the used bags. (In many states one has to buy a license by paying a fee to dump the waste). Also replacement bag filters add to the cost of operation.

SMC custom builds the whole FN1 package to suit an individual OEM requirements, which can replace the bag filter or can be used before the bag filters to extend the life of bag filter

Contact SMC for your custom-built filtration system and help protect the environment.