RE: Problem with UAT tank. how to correctly set up fuel system
Hi Ulrich
Glad you sorted it out...
I use Festo manual valve for safety shut-off in the pressure side. Suction side is as direct and short as possible. Even if Festo says that they can operate under a small amount of vaccum, remember theose were designed to operate with air and not jet fuel.
To guarantee that the system can operate unnder vacuum, you should use Festo tube in the pressure side or other PU type tube. What I see ususally, are tygon connected to PU, than a Shut-off valve, again PU tube and tygon, and so on. GO short and direct, that´s it. With time, if you have an old or improper tube in the suction side, you get a reasonable chance for air to get in, specially with big engines at full throtle...
On the pressure side, in the event of a manual shut-off and pump still working, don't worry because the pump won't generate enough pressure to blow things up. The worst scenario after a reasonable time might be a burn motor. It wouldn't happen because ECU would shut pump off
To each, it's own....
Regards
Nuno