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END-OF-LINE VACUUM VENT
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| SERIES | HOUSING | PALLETS | PALLET DIAPHRAGM |
| 6240 | Aluminum 356 | Aluminum | FEP Film |
| C6240 | Ductile Iron A536 | 316 S.S. | FEP Film |
| F6240 | 316 S.S. | 316 S.S. | FEP Film |
| RE6240 | Aluminim 356 | 316 S.S. | FEP Film |
| M6240 | Hastelloy A494 | Hastelloy C276 | FEP Film |
| Flange mating: | Aluminum: | Mates with 125# FF ANSI | |
| Other metals: | Mates with 150# RF ANSI |
Protectoseal Series No. 6240 Vacuum Relief Vents are intended for use
where only vacuum relief is required. A pallet in the vent housing retards
air intake as the tank normally breathes in due to atmospheric temperature
changes or emptying of the tank. The pallet opens and closes to permit
only that intake relief necessary to avoid tank damage under normal operating
conditions.