The 556 two-way breather valve is used extensively on military enclosures and provides pressure relief in a variety of scenarios. It protects the enclosure from excess pressure and vacuum during air transport, equalizes pressure due to temperature fluctuations, and relieves back pressure developed when a door is opened and closed.
The 556 can be configured with many pressure settings, with an airtight cover or louvered cover, and for various installation wall thickness. Just let us know your specific needs.
- Diameter: 4 in
- Housing: Aluminum
- Housing Finish: Hard Anodized
- Seals: Neoprene
- Standard Cracking Pressure: 1.0-2.0 inH2O