| GENERAL CHARACTERISTICS ITEM DESCRIPTION | VENT VALVE INCLUDES A PRESSURE RELIEF VALVE AND A VACUUM RELIEF VALVE,PRESSURE AND VACUUM VALVES USUALLY CLOSED,PRESSURE OPENS AT 2 PORM 0.250 PSI ON INCREASING PRESSURE AND CLOSES ON DECREASING PRESSURE ABOVE 1.5 PSI,VACUUM APPLIED AT TANK END OPENS AT 0.250 PORM 0.100 PSI,ALUMINUM ALLOY BODY,ANODIZED,4.500 IN. O/A L,2.750 IN. O/A OD,ONE 1.063 IN.-12N-3 CONNECTION,UNIT INCORPORATES NO BLEED HOLE |