Despite its small 2-inch size, the 391 breather valve provides a strong flow profile of 20 cfm at 0.4 psi. Included is a manual relief feature to equalize internal pressure to make opening the container easier. One application that utilizes the 391 is a medium-sized, fiberglass shipping container for transporting propellers.
- Diameter: 2 in
- Housing: Aluminum
- Housing Finish: Hard Anodized
- Seals: Neoprene
- Standard Cracking Pressure: 0.26 ± 10% psig