Immersion Proof Breathers For Sealed Enclosures

Immersion-proof breathers don’t require any pressure to operate but still equalize pressure differentials. They have a membrane that prevents dust and liquids from passing through which helps them protect cases that are submerged in water. However, gasses (e.g. air) can still enter.

In the event of rapid temperature drops when there is insufficient time for water vapor to exit through the breather, moisture inside the enclosure can condense.

While an immersion-proof breather will not maintain as dry of an environment as a breather valve, if you include some kind of desiccant (e.g. custom desiccant), it is maintenance-free.

Immersion-proof breathers are commonly used in applications where occasional condensation will not cause a problem and where replacing desiccant is either not possible or desired. Since immersion-proof breathers are smaller than breather valves and flow air constantly (because they don’t seal) they’re more commonly used on smaller enclosures containing contents that are typically more moisture resistant.

This can include:

• Computer keyboards
• Meteorological instruments
• IP enclosures
• Gearboxes and transmissions
• Handheld terminals
• Battery housings
• Azimuth sealed devices
• Equipment needing protection from hose down requirements.

The use of immersion-proof breathers is common among the same industries as our other pressure control products (e.g. breather valves), this includes:

• Aerospace
• Space
• Defense
• Shipping & Logistics