Hello All,
I attempted to fuel my jet today for the first time to check for leaks. I have no previous experience with a UAT's or this kind of fuel system.
I filled the system thru the UAT and as the UAT became full, fuel poured out of the cap and of course into the airplane. It is a Hanson UAT and I checked the cap and it was tight. I had not disassembled the tank before this. I then took the cap off to check to see if it was cross-threaded. It was not and i re-tightened but got the same results on the second attempt.
I have attached a pic of the UAT. This is my first UAT but I think I may have figured it out. There appears to be a black seal under the cap. If that is a seal, most of it is missing. Can anyone verify this by looking at the pic?

Thank you,
Cody

Cody,

If it is missing something, Bruce has excellent customer service and will take care of it!!

Cody, FWIW, I have always used the BV product and have never tried one of the imitations. What held me back from trying them is the way they attach the fuel line. IMO after years of finding ways to get better value for my money, the cost of the bv UAT is such a small percent of the overall project that it's just worth it.

I have spent hundreds of hours researching where to get high quality products at wholesale costs such as the "bvm" airline, generically it is "polyurethane tubing" 95a durometer. And even with that small tidbit of information, you will save a couple hundred dollars on airline over the next ten years just knowing that little fact. Spring for the good stuff when it comes to fueling your turbine.

Just my opinion...... and good luck with your project.

I've got to ask, you did have the fuel line from the cap to the pump connected right?????

otherwise some Teflon tape on the cap is all you need for a proper seal.

Thanks Sean, I will certainly consider your advise. I almost went with a BVM UAT but I read many post here from people who used the Hanson. Now, we cant rule out operator error here so there may be nothing wrong with the trap.

KC36330,
As per the instructions, the festo connection is connected to the fuel pump, as you look at the pic, the line on the top right goes to the fuel tank and the line on the top left is the fill line, I understand that the system is to be filled thru this fill line. Isnt this correct? The UAT filled with fuel and then fuel started going into the main tank but there was an equal amount of fuel coming out of the UAT from around the threaded neck.

Cody

you have it hooked up correctly, just take that black seal out and use Teflon tape around the threads and you shouldn't have anymore problems.

I don't have a Hanson UAT so I don't have any first hand experience with them. My advice is to remove whatever that black thing is in the cap. If you look at Hanson's ad he doesn't show any cap seal. Those Nalgene caps have a built in lip seal and any additional seal is not necessary.

Make sure that the top of the bottle and the cap will contact evenly all around the circumference. Check it with some air pressure before trying to fill again.

Joe

Never had any problem with the Hanson UAT's. Always work perfectly right out of the box. Call Bruce he will take care of you.

Al

Gordus,
is it leaking at the cap threads or the Festo connection?

I have a brand new Hansen Trap I just pulled out of the bag, the cap threads have Teflon tape applied, mine does not have that dark object like is shown in your photo, did you take the cap off to investigate?

The only O-ring that should be in the cap is the seal for the Festo connector.

Here are some photos of mine....good luck

Whats that black thing inside the cap? I don't think it sould be there and I recon this is why its leaking. The PTFE tape does nothing to help the seal it is simply there to stop the top vibrating loose.

Jason

Ok, Thanks Everyone.
Turns out the "black thing" is an o-ring that was inproperly installed. Now I'm not sure if I should return it for an exchange or try to disassemble it and fix it myself and risk damaging it to the point where it wouldnt be accepted as an exchange.
This has been a long project already and the last thing I want to do know is wait for another UAT. []
I should have known better than to take a new component out of the package and not check that it appears to be operational.

Thanks,
Cody

I bought several good UAT's from Bruce, just got my first bad one (leaking air inside while running) - emailed Bruce will see what he says..

I quit using festo connectors on fuel lines. When your fuel tubing hardens and shrinks, air bubbles get sucked in at the connectors.

If you stick with a BVM UAT, and wire-tied tygon over metal fittings, your fuel system won't leak fuel or draw air (unless you try to fuel or de-fuel with the vent capped, then you get to repair your fuel tanks ).

At least that's been my experience...

Guy's after doing months of testing I have had no trouble with the SuperTrap, I fully warranty them and will replace for free tested before it is sent... Festos work fine as long as you use 1/4" tubing I supply, allot of people try to use 6mm thinking it's 1/4 in. and an air leak will accure.. these problems I have run into ... I will replace the tank with a compression type fitting if you wish.. Please let's not forget how many BVM tanks have been recalled for leaks... I have over nine hundred of these tanks out in the field this year alone... I stand behind my products just like I have for the last 25 years... As for the black O-ring seal that is what seals the filter holder to the cap....


BH Hanson

Cody, It looks like the o-ring seal came out, Please send it back for a new tank.....


BH Hanson

in my opinion there is a better uat than bv, or hanson
jet model product's accumulator

Mr. Hanson,
I just noticed that you offer a compression style trap shortly before you posted here - I like that one!

pbusa1400,
JMP's is niiiice!

you can always try a pst bubble trap