The overpressure valve (without explosion protection) serves to guide the extract air inside the shelter and to build up an overpressure in the clean part of the shelter against contaminated areas (decontamination gas lock etc.) During a shutdown of the ventilation system, the extract air openings are closed automatically.

Overpressure valve made by European EMC Products (EEP), UK.

• Overpressure valve with casting hot galvanized, shutting disc made of aluminum, gasket and 3 clips
• Telescopic tube, adjustable for wall thickness 20 to 37 cm.
• Counter flange, hot galvanized.
• Protection screen.