Page 85 - Attwood Marine Products Collection 2020

EPA CERTIFIED INTEGRATED

FUEL SYSTEMS

PRESSURE RELIEF FUEL SYSTEMS

Pressure relief systems are designed with automatic diurnal ensure the tank fills to the proper level every time without
emission control and overpressure relief safety valves built spit-back or well-back. All Attwood pressure relief systems
into the cap of the fill. The overpressure relief safety valves are designed to ensure water does not enter the fuel tank
are engineered to release pressure above 1 psi. The high- and are compatible with Jerry Can and marine nozzle
flow vacuum valves allow fresh air to enter the fuel tank refueling.
to replace the fuel being consumed by the engine. Other
components of a pressure relief system are designed to

Direct Fill Pressure Remote Fill Pressure Relief
Relief Fuel System Fuel System

• Dual 1 psi diurnal emission control and overpressure • Dual 1 psi diurnal emission control and
relief safety valves built into the cap overpressure relief safety valves built
• Dual high-flow vacuum valves ensure maximum into the cap
make-up air flow with minimum vacuum restriction • Triple high-flow vacuum valves ensure
• Automatic nozzle shutoff 4-10 gpm maximum make-up air flow
• Anti-backout feature prevents accidental removal (compatible with high HP applications)
• Reduced number of system components • Automatic nozzle shutoff 4-18 gpm

Fill Limit Vent Valve Fuel Demand Valve
Grade Valve Direct Fill Unit
Inlet Control Valve Deck Fill Unit

EPA CERTIFIED INTEGRATED FUEL SYSTEMS OVERVIEW

FUEL 83