What is a blast valve?
A blast valve is used to protect the occupants within a shelter from the effects of a sudden outside air pressure change (such as a nuclear weapon detonation). A nuclear weapon creates a shock wave which creates a sudden pressure change. This change in pressure can produce extreme changes to our normal atmospheric pressure several miles away from the point of detonation.
How Do Blast Valves work?
Blast valves are mounted over the air intake and air outflow piping in a shelter. They work by allowing the low air pressure to move throughout them in either direction, but they automatically shut when there is a nearby high change in pressure such as a detonation. They also closed when there is a negative pressure (a detonation can blow the atmosphere out from its point of origin) which can be just as dangerous as high pressure.
Why Does Every Emergency Shelter Need Blast Valves?
Any airtight container that you are seeking refuge from a detonation needs a blast valve. Imagine a submarine in a deep sea that has been leak. The sudden change of pressure causes the submarine to implode. A bunker / storm shelter / safe room has similar issues to deal with in terms of an extreme pressure change cause by a nearby detonation.
Let’s say that you have a storm shelter in your backyard. You hear word that a terrorist organization is detonating several bombs in your area. Your first thought is to seek shelter in your storm shelter. If a blast occurs within a certain radius of your shelter causing a major change in pressure, well it’s just not pretty. You have very little protection from a sudden change of extreme pressure in a shelter that doesn’t have a blast valve. You could have the most fortified bunker in the world, but without a blast valve you might as well be standing out in the open.
There is a solution
A blast valve from Rising S Company provides adequate protection form any sudden change of pressure caused by a nearby detonation. Any type of shelter from Rising S Bunkers can be outfitted to have a blast valve. To learn more about blast valves and how they relate to bunkers, see our blast valve page.