Located in the Keller. What is the function, is it about air filtration or something?
Those are overpressure valves. To make sure the air overpressure from a nearby explosion won’t kill whoever is hiding on the inside.
Overpressure is one of the things that makes explosions deadly. You don’t need to hit a target directly in order for an explosion to be deadly. And you don’t need to destroy the thick concrete walls of a bunker in order to kill whoever is hiding inside. A near-miss that’s close enough will still kill everyone inside if the shockwave and overpressure can reach them.
Überdruckventil
Wen die Lüftung läuft und alle (Panzer/Druck)-Türen zu sind wird ein Luftüberdruck erzeugt der das eindringen von Rauch oder Gas in den Schutzraum verhindert. Die überschüssige Luft drückt die Klappen auf, und entweicht.
Explosionsschtzventil sind in der Regel nur bei Aussenwänden und in Ruhe offen. Die im Bild von innen in die Schleuse in Ruhe zu.
Classic overpressure valves in an airstrike bunker.
Will save your ass, when the commies drop nukes and invade with their tank armies.
wondered what these are since I was s kid, thanks for asking
I’m not so sure these “Ablüftungsventile” are meant to protect from an overpressure in case of an explosion – as the overpressure would be outside and they clearly are designed to let air escape.
The [technical blurb](https://www.mengeu.ch/schutzraum-planung#ueberdruckberechnung) from the manufacturer doesn’t mention explosions either, but just the normal overpressure in the bunker when air gets pumped into it so people don’t suffocate when the doors are closed. This air has to get out or the pressure would build up and the one-way design of these valves stops dust & gases from flowing back in, that’s all.
But then I’m not an expert…
Unser Luftschutzkeller hat eine Belüftung, welche die Luft nach aussen wegführt. Durch dieses Ventil strömt dann vom Keller neben an “Frischluft” nach.
Die Idee, dass dieses Ventil für einen Druckausgleich einer Explosionsdruckwelle dienen soll ergibt für mich keinen Sinn.
Lot of people bringing the protection for explosion pressure. It is correct, but those have also another function:
In bunkers the idea is to have a constant overpressure (=air more concentrated as outside) so that contaminated air from outside won’t enter. Those are one way valves to let the air circulate from inside to outside. Normally you would also have a filter of some sort at the intake air part.
It was mandatory in Switzerland that every new building had an antiatomic shelter. It is not anymore. If I am not wrong, it was mandatory between 1979 and 2006
11 comments
Located in the Keller. What is the function, is it about air filtration or something?
Those are overpressure valves. To make sure the air overpressure from a nearby explosion won’t kill whoever is hiding on the inside.
Overpressure is one of the things that makes explosions deadly. You don’t need to hit a target directly in order for an explosion to be deadly. And you don’t need to destroy the thick concrete walls of a bunker in order to kill whoever is hiding inside. A near-miss that’s close enough will still kill everyone inside if the shockwave and overpressure can reach them.
Überdruckventil
Wen die Lüftung läuft und alle (Panzer/Druck)-Türen zu sind wird ein Luftüberdruck erzeugt der das eindringen von Rauch oder Gas in den Schutzraum verhindert. Die überschüssige Luft drückt die Klappen auf, und entweicht.
Explosionsschtzventil sind in der Regel nur bei Aussenwänden und in Ruhe offen. Die im Bild von innen in die Schleuse in Ruhe zu.
Classic overpressure valves in an airstrike bunker.
Will save your ass, when the commies drop nukes and invade with their tank armies.
wondered what these are since I was s kid, thanks for asking
I’m not so sure these “Ablüftungsventile” are meant to protect from an overpressure in case of an explosion – as the overpressure would be outside and they clearly are designed to let air escape.
The [technical blurb](https://www.mengeu.ch/schutzraum-planung#ueberdruckberechnung) from the manufacturer doesn’t mention explosions either, but just the normal overpressure in the bunker when air gets pumped into it so people don’t suffocate when the doors are closed. This air has to get out or the pressure would build up and the one-way design of these valves stops dust & gases from flowing back in, that’s all.
But then I’m not an expert…
Unser Luftschutzkeller hat eine Belüftung, welche die Luft nach aussen wegführt. Durch dieses Ventil strömt dann vom Keller neben an “Frischluft” nach.
Die Idee, dass dieses Ventil für einen Druckausgleich einer Explosionsdruckwelle dienen soll ergibt für mich keinen Sinn.
Lot of people bringing the protection for explosion pressure. It is correct, but those have also another function:
In bunkers the idea is to have a constant overpressure (=air more concentrated as outside) so that contaminated air from outside won’t enter. Those are one way valves to let the air circulate from inside to outside. Normally you would also have a filter of some sort at the intake air part.
It was mandatory in Switzerland that every new building had an antiatomic shelter. It is not anymore. If I am not wrong, it was mandatory between 1979 and 2006
mines, they explode when you touch them