FIG 351S & 748A
Flame Arrester/Pressure Vacuum Vent
Vents | Pressure and Vacuum Vents
FIG 748A
Pressure Vacuum Vent - 3” Aluminum
Pressure vacuum vent designed for installation on top of the vent pipe of an aboveground storage tank. Poppets seal vapors in the tank when pressure is equalized. The vent allows the tank to breathe during filling and dispensing operations. This vent must be used in conjunction with an emergency vent. It is recommended that the opening pressure setting is set below that of the emergency vent so the normal vent operates first. Settings are approximate.
PRODUCT RESOURCES
Product Features
Standard Features
Vents outward and upward in compliance with NFPA 30
Tri-polar mounting screws for mounting exhaust hood in any of three positions
Optional dryer connections accommodate the installation of desiccant dryers on vacuum connection
Product Ordering Instructions
| Fig | Suffix | Size | Description | Weight |
| 748A | 3100 AV | 3” 2oz/sq.in. | Pressure Vacuum Vent, Aluminum Body | |
| 748A | 3200 AV | 3” 4oz/sq.in. | Pressure Vacuum Vent, Aluminum Body | |
| 748A | 3300 AV | 3” 6oz/sq.in. | Pressure Vacuum Vent, Aluminum Body | |
| 748A | 3400 AV | 3” 8oz/sq.in. | Pressure Vacuum Vent, Aluminum Body | |
| 748A | 3500 AV | 3” 12oz/sq.in. | Pressure Vacuum Vent, Aluminum Body | |
| 748A | 3600 AV | 3” 16oz/sq.in. | Pressure Vacuum Vent, Aluminum Body | |
| 748A | 4100 AV | 3” 2oz/sq.in. | Pressure Vacuum Vent, Aluminum Body, With Dryer Connection | |
| 748A | 4200 AV | 3” 4oz/sq.in. | Pressure Vacuum Vent, Aluminum Body, With Dryer Connection | |
| 748A | 4300 AV | 3” 6oz/sq.in. | Pressure Vacuum Vent, Aluminum Body, With Dryer Connection | |
| 748A | 4400 AV | 3” 8oz/sq.in. | Pressure Vacuum Vent, Aluminum Body, With Dryer Connection | |
| 748A | 4500 AV | 3” 12oz/sq.in. | Pressure Vacuum Vent, Aluminum Body, With Dryer Connection | |
| 748A | 4600 AV | 3” 16oz/sq.in. | Pressure Vacuum Vent, Aluminum Body, With Dryer Connection |
