Fully automatic air control.
Any efficient protective ventilation system is based on pressurizing a particular space in order to keep polluted air out.
For this purpose the inside of the operator’s cabin of a construction machine is kept under constant overpressure to prevent outside air from penetrating through any leaks. According to DGUV 201-004 regulations, this overpressure needs to be at a level between 100 and 300 Pa (Pascal).
One of the intelligent solutions of SEKA protective ventilation systems is an automatically controlled blower. At the time of delivery, effective sealing requires only 30% of the maximum blower rotation in order to achieve an air pressure of 130 Pa inside the cabin. This value will be increased automatically in order to compensate for the increasing filter resistance and keep the overpressure inside the cabin at a constant level.
Our high-performance blowers in combination with filters positioned at the pressure side of the system are able to generate differential pressures of several hundreds of Pascal. This puts the SEKA technology in a position to maintain a constantly pressurized cabin while guaranteeing maximum filter life.
The pressure-dependant blower control not only automatically adjusts itself to the changing filter resistance. It also compensates leaks in the outer skin of the cabin. This will ensure continuously reliable operation of the protective ventilation system without any manual interference.
Another aspect is a solid economic advantage due to high filter life and increased availability of the machine, since the safety of operators es guaranteed even if the cabin is not completely tight.
The increasing pollution of the filter increases their resistance which has a noticeable effect on the air flow rate of a ventilation system. The more the filters are clogged the smaller will be the air volume passing through them. This also results in a reduced overpressure inside the cabin.