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SPRAY BOOTH USER MANUAL
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Fig. 2.11
The exhausting air unit with active charcoals shown in Fig.2.11,which the air from the spray painting
environment and to decrease the percentage of polluting agents. It is composed of:
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Metal frame, there rock in the panel which can keep the temperature
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Filtration group, composed of seven layer of active charcoal which remove the solvent fumes
(purification plant).
2.2 The principle of the spray booth
The spray booth is in a dustproof closed environment in which a flow of air of the capacity and
temperature necessary to make the booth function circulates. It works in two ways, one to carry out the
spray painting phase/flash period and one for the drying phase. The pressure inside the booth is kept
slightly greater than the atmospheric pressure (60mm H2O)
,
so that it can prevent the dust get into the
booth during the operation.
2.2. 1 Spray Painting Phase
During the painting phase,both the intaker fan and exhaust fan are open,and the the damper shutter place
the position shown in Fig.2.12.The air capacity, aspirated from the outside by means of the generator fan
is precfiltered passing through the pocket filters, heated to the desired temperature (about 20°C), and
introduced into the plenum. Here an even distribution is obtained and a there is a second filtration through
the ceiling filter. After the filtration, the air crosses the booth from the top to the bottom part picking up the
paint pigments and the solvents left by the spray painting, it is then aspirated by the exhaust air unit
passing through the filters placed in the purification plant.(shown inf Fig.2.12)