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Hello, I was part of a previous thread regarding ball floats crushing in Neptune air eliminators. We have a ball float probelm in an LC 8181A eliminator at an airport up north. After looking at past comments and a more in depth review of pressure build up in a closed system I am now convinced...

THank you all for the comments. I will keep posting what happens.

Thank you JMW.. I have seen the literature you have mentioned and have read about this differential device. What I am proposing to the GNWT is that I attend the site wih the operations supervisor and do a thorough system check.. In ther words, we would install a pressure gauge on the drain...

Thank you so much JMW for this. We are looking into the solid composite balls however it seems to be a quick fix not addressing the root cause. We are all at a loss to understand where such a large liquid hammer effect could be coming from. Possible the slamming of the preset auto stop valve...

Thanks biginch- The pump can only put out 25 psi total head when blocked in so I dont think the system mpressure is anywhere near the 150 psig the meter asembly, including the ait eliminator is rated for. Still at a los to explain. Will probably have to go back, install new ball and put a...

THank you biginch and JMW for feedback. Now my theory of inernal partial vacuum resulting from rapid cooling of a room temperature ball from the box imeediately put into service in -40 deg liquid diesel is valid from a perspective of physics I think. HOwever it is a very long shot and not...

OK all. I am working along with Diaanto/Caluna on this same probelm up north. The latest si another Actaris air eliminator ball float has been found collpased at the same facility as twice before. It may be way out there, but does anyone think this may be attributable in any way to a sudden...

Caluna, your question seems all to familiar to one I am presently working on. Whwen I saw you were in NWT for the GNWT I was not suprpised at the nature of the question. I am working for the GNWT as an outside consultant and am working on this very issue. Gameti just had a ball float crush as...