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The right air filtration system for the spray booth

How to keep the filtration system in Blowtherm spray booths efficient

Blowtherm filters are designed to provide a clean working environment and ensure optimal air quality during the painting process.

They can be of two categories depending on the type of air being treated: intake air filters and exhaust air filters.

Intake filters (pocket prefilters and ceiling filters) ensure that the air in the booth is always free of dust particles that cause painting defects.

Exhaust filters:

paint stop filters and pocket post filters have the function of cleaning the air by retaining solid particulate matter, limiting pollutant emissions to the surrounding environment;
paint stop and activated carbon filters have the function of cleaning the air by retaining solid particulate matter and VOCs (volatile organic compounds) and then releasing them into the atmosphere, helping to limit pollutant emissions into the surrounding environment and reduce odors.

Blowtherm Filters

Blowtherm’s filtration system consists of several stages of filtration, each of which performs a specific function.

1 Pocket prefilters

They are installed in suction, inside the thermoventilation unit. ISO coarse filtration class 60% (ISO 16890).

2 High efficiency plenum filters

They are installed in the filter plenum of the spray booth and provide to stop dust particles that have not yet been blocked by the previous prefiltering stage. ISO ePM10 55% filtration class (ISO 16890).

3 Paint stop filters

Paint stop fiberglass filters, laid under the grids, are intended to stop the solid part of the paint. ISO coarse 50% filtration class (ISO 16890).

4 Pocked post-filters

They are installed in exhaust, inside the thermoventilation unit. ISO coarse filtration class 60% (ISO 16890)

5 Activated charcoal filters

The last stage involves toroidal or panel activated carbon cartridges specially designed to absorb the part of the solvent still nebulized in the spray as well as the solvent odors emitted into the atmosphere. The activated carbon air purifier is optimal when installed in addition to the traditional filtration system to have a more ecological impact and to have a high quality of the surrounding air.

The filtering system of the booths and preparation stations are designed to ensure a constant and uniform air flow, which ensures maximum efficiency of the painting process. In addition, the filters are easily accessible and replaceable, which simplifies maintenance and ensures longer system life as well as superior quality.

Why should you choose original Blowtherm filters?

Original Blowtherm filters guarantee:

qualita

Assured quality

ico-alta-autonomia

Optimized performance

dimensioni

Accurate and suitable measurements

ico-assistenza-autorizzata

Quick and easy maintenance and replacement

Sustainability for Blowtherm

Blowtherm filters are specifically designed to optimize paint quality and efficiency but without neglecting a crucial aspect: sustainability, not only from an environmental perspective but also from an investment and process optimization perspective. The focus is placed on: emissions reduction, energy savings, protection of the environment and operator health, and investment life cycle.

When to replace filters in an installation?

The answer is certainly not unique, however, there are some indicative parameters that signal the need to replace filters.

PLC (Programmable Logic Controller touchscreen)
The PLC can control and manage all the components of a plant. Among the various functions is that of monitoring regarding the use of the filter components. In fact, filter replacement depends on the number of hours the booth is used, which is recorded by the PLC. Through a PLC interface, the operator can check the hours of use of the installed filters and perform preventive maintenance and subsequent replacement. In this way, the PLC ensures that the filters are always efficient, reducing maintenance costs and increasing the productivity of the entire plant.
DIFFERENTIAL PRESSURE CONTROL WITH TRANSDUCER
The pressure transducer enables the system to automatically control the internal pressure in the spray booth by varying the speed of the motors and reporting pressure anomalies in the booth. In fact, when filters are clogged they lose their filtering function and risk damaging not only the execution of the individual job, but also the other components of the system.
VISUALLY
It depends on the filter being examined, however, you can generally recognize an exhausted filter by its darker color and by “pitting” on ventilation. An exhausted filter not working properly could lead to the phenomenon of overspray.

In general, it is important to regularly check the condition of the filters and replace them when necessary to ensure effective air filtration and good quality of the work done inside the booth without underestimating the alarms in the electrical panel.