• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Injection Pump Fuel Temperature Old and New

Birken Vogt

Charter Member
Joined
Nov 30, 2003
Messages
5,323
Location
Grass Valley, Ca
There has been some discussion about common rail pumps and how much heat they put into the return fuel.

Sometimes we get called on to hook something to a large and remote fuel tank. It is usually more convenient to use a single fuel pipe for that purpose.

In the old days of A pumps and PFR pumps, some of those could be arranged to return no fuel at all to the tank, or were arranged that way from the factory. Either no return or return back to transfer pump inlet. I guess their normal operation did not heat the fuel all that much that remained in the pump.

With common rail stuff, there has even been discussion that running too small of a fuel tank, fuel tank too empty, or too hot of a climate will cause fuel overheating. Some talk of fuel coolers.

Is there industry guidance on this? (TPG, looking at you) And also how do Stanadyne pumps and equivalent rotary pumps perform with fuel heating of this nature?
 

Coaldust

Senior Member
Joined
May 9, 2011
Messages
3,351
Location
North of the 60
Occupation
Cargo Tanks, ULSD, RUG, Methanol, LPG
Look up NFPA 110, for emergency and standby power. It recommends a maximum fuel temperature of 150F to maintain viscosity. NFPA30 has some good info, too.

Chevron also has recommendations to address the blackened filter media issue caused by asphaltines.
 

Nige

Senior Member
Joined
Jun 22, 2011
Messages
29,346
Location
G..G..G..Granville.........!! Fetch your cloth.
It seems that in equipment fuel tanks these days it's not a good idea to run them below the 25% where in days gone by they could be run down to 10%-ish with no major issues. To see blackened media in fuel filters is much more common than it was.

Also it is not uncommon to find fuel-cooled ECMs on electronic engines.

@Birken Vogt - what is the major driver in not installing a fuel return line.?
 

Birken Vogt

Charter Member
Joined
Nov 30, 2003
Messages
5,323
Location
Grass Valley, Ca
@Birken Vogt - what is the major driver in not installing a fuel return line.?

Sometimes it is distance back to the tank adding complication, or it can also be the desire not to filter the entire contents of a fuel delivery from a large tank within the first few hours via the machine's filter. When fuel flow is only what needed, crud stays in the tank. Also, filter waxing due to cold is minimized not filtering way more fuel than necessary.
 
Top