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Overpressure Dampers

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Pressure vents are used in gas extinguishing systems in order to safeguard the structural integrity of the enclosures. It is well known that all extinguishing gases create a positive pressurization of the protected enclosure during discharge and some of them (HFC227ea, FK-5-1-12 and HFC-125) create also a negative pressurization.


Bettati antincendio pressure vents are counter weighted flap vent type with vent blades fully opened at 80 Pa. Vents can be used in single flow condition or, by removing a locking device in multi flow condition if required (feature available up to 500 mm nominal dimension). All vents are fire rated 4 hour according to EN1364 and can be provided with weather louvres for external side installation.

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