This 3 inch Guardian Pressure Valve has PTFE seals and should be used on a 25 MAWP tank. The Betts Guardian vent is a spring loaded reclosing pressure relief device/valve for use as a 407/412 cargo tanks primary pressure relief system. The pressure relief valve is designed, tested and marked in accordance with 49CFR §178.345-10, 49CFR §178.347-4 and 49CFR §178.348-4.
- Compact, optimized flow design
- Safety Stop Screw to help prevent accidental unthreading of housing
- Seal tabs on shroud for security measures
- Simple in-place maintenance
- Size: 3 in.
- Connection: NPS
- Material: 316 Stainless steel
- Seal Material: PTFE
- Temperature Range: -40°F - 400°F (-40°C - 204°C)
- Flow: 379,461 SCFH @ 40 PSIG