Morrison Bros 244OM-0100 AV 4” Male NPT Threaded Emergency Vent with O-Ring provides high capacity pressure relief if the tank is exposed to fire. When the internal tank pressure reaches the opening pressure of the vent, the weighted cover moves up on the center pin allowing air to escape. When the internal tank pressure falls, the cover automatically lowers back onto the body and is automatically reset. The vent must be used in conjunction with a “normal vent.” Correct application of this vent requires proper vent size and selection for the tank system in order to meet the specific venting capacity.

Features

• Body material: Aluminum
• Cover material: Powder coated cast iron
• O-Ring material: FKM-A, standard models
• Screen material: 3 mesh stainless steel
• Pressure Setting: 8 oz./in2
• Venting Capacity (SCFH): 131,700 @ 2.5 PSI
• Mounting Connection: Male NPT
• Overall Diameter: 9”
• Height: 4.79”
• Automatically resets after opening
• Durable powder coated cast iron covers
• Certified SCFH flow capacities
• Theft deterrent screens available