ROLLOVER VALVE CONSTRUCTION/OPERATION


BHE011642720T02

• The rollover valves are welded in two locations in the evaporative gas path on the top of the fuel tank and cannot be removed/installed.

1
Open
2
Close
3
Valve
4
Float
5
Spring
6
Evaporative gas flow
7
Fuel level

• The rollover valve mainly consists of a float and spring.

• When the float is saturated with fuel, the float (valve) closes to shut the sealing surface of the path due to the weight of the float, spring force, and flotation relationship.