The MLL overpressure valves protect in areas where rapid pressure relief must be provided.
They have a free ventilation cross section up to 60% (depending upon the opening angle of the slat).
Our pressure relief valves are specially designed for the protection of electrical rooms, transformer rooms and storage facilities. Wherever rapid pressure relief must be safeguarded.
In case pressure increases above the specified level, the slats open automatically. The air current caused by the excess pressure can now escape through the overpressure valve. The valve size is matched to the room volume and according to the calculated air to escape in extreme conditions.