Filters

Coarse dustfilter (P1/EU5)

To remove dust particles from the cabin-air, Freshfilter can supply dust filter-elements. The dust filters must be placed at the most polluted side of the overpressure unit, since their function also consists of protecting the next (fragile) carbon- and HEPA filter elements.

After production, every HEPA filter is tested on this rig to ensure that the element is compliant

Toxic finedust HEPA filter (P3/EU13)

According to the EN1822, Freshfilter produces H13 absolute filters (also called P3). Unlike the coarse dust filters, they are tested individually for leaks and are supplied with a test certificate. This indicates how the filter has been tested and under what conditions. Heavy metals and asbestos particles are trapped by a P3 filter, which is why this filter is often used in demolition works. Because this filter is very sensitive to damage, it is always recommended to install a coarse dust filter (P1 or P2) in front of this filter. The coarse parts are thus pre-filtered and can not tear through the P3 filter.

Every small hole in either the glueing of the filter or the filterelement leaves a visible smoke plume behind which the tester can see if the filter has to be rejected (and destroyed).

Washable dust filters

We also produce special H10 filters for various systems. The filter filter gradation thereof lies between P2 and P3 filters. This special filter has a rinsable medium with teflon coating, for extremely dusty situations. The teflon layer is also anti-static, even damp dust particles do not stick to the filter cloth. I.c.m. the self-cleaning properties of the FF MultiBox, for example, ensure an unusually long service life!

The test certificate of the filter indicates under which conditions the filter has been tested and by whom.

P1Coarse dust according to EN779
P2Fine dust according to EN779
P3Toxic fine dust according to EN1822 - Asbestos - Lead - Other heavy metals

active-cabon gas filter (A-ABEKHG)

In active condition, carbon has an enormous surface and therefore it can be used for deodorisation of gasses. Carbon filter-elements are used to protect the driver against the inhalation of specific toxic vapours. Freshfilter supplies active-carbon filter-elements in conformity with the ABEKHg-classification in the most common sizes.

AAromatics and PAH's organic vapors. BTEX.
XAromatics with a boiling point <65 ° C
BInorganic substances such as chlorine, cyanide, etc.
ESulfur dioxide and inorganic vapors of acids.
KAmmonia
HgMercury vapors

Replace the carbon elements every 9 weeks at minimum. Always place a dust filter-element in front of the carbon filter-element for protection. When the PPM exceeds the 5PPM or when odour pollution is notices, always replace the carbon filter-element!

Quality assurance per serial number

Thanks to the serial number on the filter, we can retrieve the correct lot number (coal) or piece test (H13) digitally through our automated system. The history of a charcoal filter, for example, can be traced back to the coconut husk or the coal mine!

Filter replacement

The NEN4444 / CROW132 guidelines prescribe that carbon filters can be replaced after 540 running hours (roughly 13 weeks) and dust filters after a maximum of 1080 operating hours (roughly 6 months).

Of course, the saturation of filters depends on all kinds of external factors, such as the degree of pollution in the working area, the type of overpressure system and the seal of the cabin. With our FFController 5000 you can constantly monitor the saturation and operation of your filter package by means of indoor and outdoor sensors and make optimum use of your cab air quality system.