The purpose of any packaging area of the food or pharmaceutical industry is to guarantee the safety of the products processed there, so that they are not contaminated as a result of contact with the operators, the materials of the machinery or the environmental conditions. This type of space is called a clean room, its level of rigor and/or demand being determined by a considerable number of factors, basically depending on the criticality of the product handled.
The ISO 14644-1 standard defines a clean room as the space in which the concentration of airborne particles is controlled, and which is constructed and used in such a way as to minimize the introduction, generation, and retention of particles within the area and in which other relevant parameters are controlled such as temperature, humidity and pressure, if necessary.
The standard, in turn, classifies spaces according to the size and quantity of particles found in it. The most rigorous is called ISO 1 and the most permissive is ISO 9.
In practice, a clean room should have:
An adequate air distribution, with a marked direction between the injection and the return of the air conditioning to avoid micro environments.
Air filtration, using both low, medium and high efficiency equipment on the same line. Normally the low and medium ones are to protect the high efficiency ones.
Avoid at all costs that the space is in depression, that is, internal pressure less than the environmental one. This must be guaranteed especially in areas with forced extraction systems. To do this, outside air must be injected (without contaminants) and passed through the filter system.
Maintain required volume renewals. Complying with the previous point.
The ductwork must be round, washable and the joints (joints) must be external, in order to avoid the probability of accumulation of particles in the interstices.
Cleanroom Design Manual
RGA, in parallel to the work on the extraction system ( see work ), executed the air conditioning system for the sugar packaging area, considering it as an ISO 5 type clean room . It installed 25 tons of refrigeration through direct expansion with compact units, of which 15 tons were directed to the upper floor of the packing area, where the largest extraction is located. The rest was installed for the Ground Floor, following the guidelines set out in the project developed by the same company ( see more ).
The activities developed here included:
Manufacture and Installation (F/I) of round galvanized ductwork in 2nd and 22 gauge with diameters between 26″ and 13″.
F/I of the fresh air injection system, with the implementation of free cooling to reduce the thermal load on the air conditioning units.
F/I of filter boxes and manholes.
Installation of electrical connection for control and ignition of air conditioning units.
Installation of support air blower units (busters).
Installation of power and control electrical connection for the busters.
Successive start-up, commissioning and monitoring of parameters (speed, static pressure of the systems).
In the following video you can see a little more about how the work was delivered.
With this work, RGA is positioned as one of the most complete companies , successfully venturing into key areas for the industry such as: sustainability (carbon footprint), energy efficiency (application of the ISO 50002:2014 standard), control of work spaces (clean room and dust extraction), water treatment and professional