Essentially, the valve is there to automatically equalise the interior air pressure, in line with changes to the exterior air pressure. This prevents problems with ‘vacuum lock’, for example after taking the case on a flight, it will never be difficult to get open.
In a word, no. It allows air to flow, but water, dust and dirt are repelled. We have to get a little more technical to explain exactly how this works.
For Protector and Air cases, the valve is made up of a housing with a hole, covered by a thin Gore-Tex® membrane. This membrane allows the continuous flow of gases and vapours, but it is hydrophobic and therefore repels water molecules.
Many brands of protective cases do appear to come with a pressure release valve, however it is important to exercise caution before purchasing.
With some brands, the valve uses less sophisticated technology and is not automatic, requiring manual releasing. There are even some cases where a small valve-like piece of plastic is screwed onto the case, but it actually serves no function.
We can’t exactly pertain not to be biased, but this is just one of the many reasons why, if you’re serious about protection, we’d always recommend going with a genuine Peli / Pelican case to avoid disappointment.
Problems with the valves on genuine Peli cases are very rare. However, thanks to the famous Lifetime Guarantee, if you do ever encounter any problems we will always be able to offer a replacement or fix at no cost to you. Visit our Lifetime Guarantee page for further information.