Desa System

Reducing the air volume by just by 20%, implicates that the fan consumption will be reduced to 52% of its full power. This means 48% of savings, indeed air volume and electrical power are not combined in a linear connection. DESA is designed to fit on each machine a sensor (called SAVER); the SAVER will immediately communicate to our Panel PC if a machine is active or not. If the machine is active the Panel PC will open the damper related to the machine, and keep it open exclusively until the machine needs it, or applying a closing delay if requested. In the same time the fan will get to the right speed and torque to generate the correct air volume (Fig. 3).

DESA also will control the minimum suspension velocity in your ductwork, and avoid it to deposit, especially in the main large duct. DESA will command a number of inactive dampers to open in order to provide enough airflow for this to happen. For further safety DESA has a cyclic operation for flushing all ductwork, by opening all dampers and run the system at full speed for a short time. The same happens at the end of each shift.

We can retrofit or install with your new system a DESA system in all type of industries.

DESA has a patented system to control your air volume and your systems pressure, and adapt it to the real demand. The information collected from the SAVERS is continuously elaborated and the PANEL PC produces the correct set up for your fan all the time. The patented pressure control is unique, and delivers always the correct pressure from the fan. If a machine is located close to the fan, the pressure drop will be quite low. While if a machine with the same dropper size as the above mentioned one, is located further down the line, it would require a much higher pressure to deliver the same volume as the nearby machine. This is critical for all dust extraction systems, and this is where the DESA patent makes the difference. An inverter alone, set to a simple cubic relation curve is not delivering any performance. Every combination of machines needs a specific set point, and only DESA can offer this technology, as it is patented.

If a system is equipped with a simple control through a pressure probe, it will never know what is the extraction demand, but it will react to a sudden but undetermined need (or excess) of extraction, derivate from a change in the main pressure loss of the system, occurring in the main ductwork. A main problem derives from the fact that pressure drives the reaction of the fan, so as a matter of fact it needs to deliver a reduced set point in pressure, means you will never be able to run a full pressure system as it was initially designed, and therefore when your filters are slightly dirty all those machines more distant from the fan will start having poor extraction all the rime. This type of system just speeds up or down the fan, and it cannot guarantee a correct air volume in droppers, nor avoid deposits in the main ductwork, and most of all, it can easily lead to ductwork implosions. All these situations are unsafe and unacceptable.

DESA will always know what is the precise demand of airflow and air pressure, and it will always protect from implosions and from dust deposits, as it is a safe and reliable system.

One of the main parts of the system is the POWER UNIT (which will have an inverter fitted inside among all other things). This will be fitted close to the fan and will manage the fan. It will also disengage mechanically the DESA in case of failure, assuring that you will never stop your manufacturing processes for reasons depending from a DESA malfunction.

The POWER UNIT will return to the DESA unit all the necessary data regarding the fan and the power consumption, heat and possible problems and related savings, so that DESA can apply its patented algorithm and determinate always the right volume and pressure needed by the system.