PureFlow AirDog®
AirDog® II-5G DF-165
2011-2016 6.7L Powerstroke
3
OVERVIEW
Thank you for your purchase and welcome to PureFlow AirDog’s AirDog®II-5G fuel air
separation and delivery system for the 2011-2016 6.7L.
The AirDog®II-5G is an all in one premium fuel pump and filtration system for the 6.7L.
This system removes water, particulates, and entrained air from the diesel fuel. The entrained
air that is separated from the fuel is returned to the tank through a small return fitting. The
fuel is delivered to the engine at the correct pressure and flow rate to meet the demands of
the engine under all operating conditions.
The AirDog®II-5G DF-165 systems feature a built in adjustible diaphragm pressure
regulator. All AirDog®II-5G systems include a complete installation kit.
The AirDog®II-5G, for this particular application, is preset at 65psi from factory for a
stock application. The regulator is adjustible up to 75 psi for fine tuning the system for
performance upgrades.
WARNING: RUNNING THE PUMP ABOVE 75PSI WILL DECREASE THE
LIFE OF THE PUMP SIGNIFICANTLY AND MAY VOID THE WARRANTY.
PureFlow AirDog products are manufactured in Shelbyville Indiana by a team of skilled
workers with unsurpassed attention to detail and using the most stringent quality assurance.
HOW THE 5G OPERATES
The AirDog®II-5G DF-165 draws fuel from the fuel tank. The fuel is then drawn through the
water separator where 92% of water is removed per SAE spec 1488. It is then pressurized
through a Gerotor pump and sent to the 2 micron fuel filter before it is sent to the injection
pump. The air from aerated fuel, due to tank sloshing and engine return lines, is separated
and sent back to the tank through the 3/8” return fitting. The excess fuel that the engine does
not use is recirculated through the diaphragm regulator back to the suction side of the pump.
