Dead - 951

Question for all engineers out there. I am kind of in a quandary at work and need a little help locating a valve for a fuel tank. I am doing a test on an aircraft fuel tank to measure the oxygen concentration. The approach to take the sample is to insert a 1/4" od, 1/8" id ss tube into the tank and, via a vacuum pump, suck (insert joke here) a sample to the oxygen analyzers. The problem is that as the fuel level rises during the test, the tips of the probes are going to be immersed in fuel. This means we are going to suck JP-8 into the analyzers (not good) unless we put a mechanical float valve on the tip of the probe to eliminate getting fuel into the analyzers. Seems like a good solution.

Problem...
I cannot Find any Float valves suitable for my application. If anyone knows where I can find an extremely compact float valve that can be fully immersed in jet fuel, attached to a 1/4" tube by way of a swage-lock compression fitting, and can seal well enough to hold a -10psi vacuum, I would be eternally in your debt. For ever and ever and ever and ever and ever.

Peace out.

viperbob

How about a Holley carb float setup?? Designed to live in fuel.

Just a thought.

<a href="http://store.summitracing.com/product.asp?d=18&s=37&p=721&searchtype=ecat" target="_blank">http://store.summitracing.com/product.asp?d=18&s=37&p=721&searchtype=ecat</a>

Dead - 951

Hi Bob,
I already thought about that and the assembly is too large and will not maintain the seal I need. Thanks for the info. Appreciate it.

GTR 993

Try this link.
<a href="http://www.thevalveshop.com/menu/manual/kerick/kerick.html" target="_blank">www.thevalveshop.com/menu/manual/kerick/kerick.html</a>