Fuel Evaporation Systems: Description

The fuel evaporation control system is designed to prevent raw fuel vapors from escaping into the atmosphere. This is a closed system (not vented) and consists of a special fuel tank with "dome" design and/or a liquid/vapor separator, a pressure/vacuum fuel cap, an orifice valve (Ford), a rollover valve, a liquid check valve (Jeep), a purge valve, 1 or 2 charcoal canisters and necessary vapor and vacuum hoses.