EcoAtex the first customized anti-static cages on the market

Electrostatic discharges are in first place among the causes of fires and explosions in air dedusting systems. Depending on the type of dust present and in certain environmental conditions, the electrostatic discharge can generate enough energy for a trigger with severe consequences for the system and the people present.

Single or multiple electrostatic discharges are generated by the presence of insulators (bag filters) and coupled conductors (filter cages and tube plates).

It is not always possible to ground all the elements of the filtering machine with the same equipotential.

Bag filter cages are made of steel and are therefore conductors of electrical current.

In the contact and detachment between insulation and conductors, any charges present could trigger a dangerous spark.

The solution proposed by CleanAir Europe, the EcoAtex filter cages, allows to reduce the electrostatic risk to a minimum without having to connect each filter cage to the ground, through an anti-static and static dissipative characteristic of the filter cage itself, superficially treated with a treatment aimed at giving the best class of surface resistivity for a gradual transmission to earth of the charges eventually transferred to the filter cage.

A special marking and the declaration of conformity to the Atex Community Directive complete the offer.


No spark

Sparks, single or multiple, cause fires and explosions in filtering machines in environments with explosive or particularly dusty gases. EcoAtex avoids the formation of sparks caused by sudden electrostatic discharges.

No flame

EcoAtex is a good thermal insulator, yields surface overheating, maintains its physical characteristics at higher temperatures than epoxy painting or galvanizing. Reduces the risk of flames originating from rubbing or vibration.

No discharge

EcoAtex engineers have studied the best class of surface resistivity of current to avoid the deposition of electrostatic charges on the surface of the cages and allow their slow discharge to the ground.


EcoAtex is versatile and increases the safety of the filter in any condition, in combination with any type of filter bags, antistatic or insulating once, providing the best path towards a slow discharge to earth of any unwanted current.

No rust

Metal rust could cause the bag filter and cage to break prematurely, stain and spoil the filter, and spread corrosion to other metal parts of the filter machine. Eco Atex is an excellent defense against rust.


Each filter system originally has a particular cage designed for that specific solution. With Eco Atex it is always possible to refit and adapt to the different structural types of cage requested. It is a customized product that can be made to measure for the customer.

Surface resistance class (ohm square)

EcoAtex is positioned along the following scale on the border between anti-static behaviour (collects few charges) and static dissipative (discharges them slowly to the ground)

Surface resistance class (ohm square)

Towards a protected electrostatic area

Towards a protected electrostatic area

The graph on the side highlights the four areas of use of the cage in dedusting systems in conjunction with the bag filter. With or without an antistatic bag filter, the EcoAtex cage moves to a safer electrical area reducing the risk of a high potential discharge.

Verso un miglior rendimento energetico

Towards a better energy performance

It is well known that charges of an electrostatic nature tend to form and strengthen in contact between distant elements in the triboelectric scale of materials. The treatment based on EcoAtex epoxy resins reduces the distance in the series compared to bare steel and therefore the collection of the charge in contact with the materials most often used for bag filters such as polyester, polypropylene, PTFE, the Polyimide. Less charge means less adhesion of the dust to the textile filter and consequently less use of the compressor and therefore less energy consumption.

For an analysis of the complete triboelectric series of polymers see:

Journal of electrostatics 62 (2004) 277-290 by a.F.Diaz and R.M. Felix -Navarro.

Resistance to pollutants

Resistance to pollutants

In this table we report qualitative indications of the resistance of EcoAtex to the main polluting chemical species normally present in the filter chambers. With the exception of hydrochloric and hydrofluoric acids for which it is appropriate to monitor the concentrations, EcoAtex resists all the substances mentioned very effectively.

Degradation of treatment and behavior in temperature

Degradation of treatment and behavior in temperature

The graph shows how the surface resistivity (10^ ohm square) decreases as the temperature increases and over time, however, remaining within the useful range to guarantee the antistatic characteristic, at least until the corrosion protection layer is sufficient to protect against rust.

EcoAtex an ecological label with a low environmental impact

EcoAtex an ecological label with a low environmental impact

EcoAtex is a green label according to ISO 14021.

Thanks to the cataphoresis treatment, it prolongs the life of the product over time and consequently reduces the amount of waste. The energy used for the production of the EcoAtex filter cages comes mainly from renewable energy sources. The footprint of the cataphoresis process is among the lowest possible for surface painting treatments.

The Atex marking

The Atex marking

In compliance with the directive, the EcoAtex drum is marked Ce and Atex with a special metal plate which also indicates by means of the envisaged coding: the zones classified for use (example II 3D, zone 22), the temperature ranges (example T2), the means of containment (example m), the traceability references of the batch, the name and address of the manufacturer.

Each Atex filter cage is individually identified.


FAQ - Frequently Asked Questions about EcoAtex

Is the EcoAtex a Coating treatment?

Yes, EcoAtex is a specific surface treatment aimed to achieve a class of superficial resistivity. It adds anti-corrosion features and good resistance to chemicals and temperatures.

Why is EcoAtex anti-explosive?

Because EcoAtex prevents the main ignition sources originated by electrostatic discharges.

Why is EcoAtex antistatic?

EcoAtex is antistatic because its superficial resistivity varies from 10^9 to 10^6 Ohm square in the product life cycle time.

This type of treatment for which metal is it suitable?

Any kind of metals not covered by insulative superficial layers.

How expensive are cages coated with EcoAtex in comparison with conventional cages?

Eco Atec Cages are just a little more expensive than galvanized cages but with higher performance regarding corrosion and heat resistance.

How long these cages would last?

The lasting of the cages depends on several factors like temperature, humidity, presence of chemicals. Tests in a saline chamber report 1800 hours before any rust spots against 150 hours of zinc-plating coating.

This product respects the ATEX directive 2014/34/EU?

According to Directive 2014/34/EU definitions, Atex rules could be applied to "components" and not only to "Equipment." (See Atex directive page L96/313-314).

How can you make CE-marking and ATEX categories for this product?

According to the Directive 2014/34/EU, rules of internal production control according to ANNEX VIII are applied. EcoAtex domain is for use in Equipment Category 3. (See Atex directive page 96/318 - L96/349).

What is the advantage of using this treatment?

EcoAtex advantages could be resumed in an antistatic behaviour which decreases the likelihood of explosion and fire in dust collectors, good resistance to corrosion and chemicals, a good heat resistance.

Is the coating antistatic?

The combination of EcoAtex treatment and the steel support base is to be considered antistatic and static dissipative.

Which ATEX Zone will meet the standards?

Zone 22, EcoAtex could be used also in Zone 21 when the specific documentation is released by the auditors.

For which types of dust collectors is this treatment suitable?

For any type of dust collector based on jet pulse technology.

Does the performance of this cage is approved by any notification body?

Not yet, as soon as this approval is not compulsory for use in zone 21 and 22.

Does it have laboratory testing results?

Yes, both for protection against corrosion and superficial resistivity values determination.

Has this type of cage been tested on-site with real working conditions?

Yes, it has been tested in different working conditions and environments.

Is this coating anti-corrosive?

EcoAtex can be considered an anti-corrosive treatment. Test in saline chamber reaches 1800 hours before first rust spots start.


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