Historically, attempts to control airflow in spray booths have followed two different paths: fans assisted by Pitot tubes and dampers actuated by differential pressure switches. Both approaches have significant limitations that have reduced their effectiveness and widespread use in this field. Let us summarise them briefly. Pitot tube sensor The orifice of the Pitot tube […]
Booth ventilation: a controllable variable (Part 1) A great deal has been written about the economic and operational benefits that can be achieved by applying process control principles to finishing operations. The advent of reliable PLCs and suitable instrumentation – such as pressure transducers and flow meters – has enabled finishing operators to monitor and […]
In the past, industrial painting was often seen as a straightforward production step: it used raw materials and energy, discharged liquid and gaseous effluents and generated process waste, with limited attention to the overall impact of the coating line. Today, everyone involved in painting and coating processes has to take environmental impact into account, remembering […]
In recent years, the need to improve living standards and the quality and comfort of buildings has grown significantly, together with the need to limit heat losses as much as possible and therefore reduce energy consumption. As a result, both in new buildings and in the renovation of existing ones, we are seeing an increasing […]
In industrial ventilation and air handling systems, cleaning and maintaining filters is essential to ensure the energy efficiency of the system. A clean filter provides low pressure drop, stable airflow, and reduced electrical consumption, helping to keep the system consistently efficient and reliable. Why a clogged filter consumes more During operation, dust particles accumulate in […]
With the term Indoor Air Quality (IAQ – Indoor Air Quality) we refer to the quality of the air inside and around buildings, especially in relation to the health and comfort of occupants. In Italy, the Ministry for the Environment defines indoor pollution as “the presence, in the air of confined environments, of chemical, physical […]
A double-flow Heat Recovery Unit (HRU) is equipped with two main filter sections: Supply filter, which treats outdoor air before it is introduced into the indoor environment. Exhaust filter, which filters stale indoor air before it leaves the building, preventing coarse dust from depositing on the heat exchanger. Recommended filtration classes Exhaust filter: Class G4 […]
Replacing the filters of a controlled mechanical ventilation (HRU) system is a simple operation, but it requires some preliminary steps: identifying the filter section and the direction of the airflow. In a classic double-flow HRU, the filter sections are generally two: one for supply and one for exhaust. In some models, return filters and grille […]
The adsorption capacity of activated carbon for a given contaminant is not easy to determine for activated carbon filters. Adsorption classes on an activated carbon bed One way to give an idea of the mass of contaminant that an activated carbon can adsorb is to divide substances into four classes, with decreasing ease of adsorption. […]
The choice of the correct paint booth filters has beneficial effects on product quality, worker safety and operating costs. Outside air filters Outside air filters are the first barrier against possible impurities entering the paint booth and are used to filter the larger particles present in the airflow coming from outside. They are generally pre-filters […]
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