Dunahm Air Eliminator replacement available

Dave in QCA

I found a substitute for the Dunham Air Eliminator and wanted to post the information for all to see. Of course, it would also work for any system that used a float type air eliminator on the return piping of a 2-pipe vapor system, such as ARCO, etc.



The device is made by Spirax-Sarco, and is intended for use in hydronic systems to let air out of places where it might be trapped, but then closes via the float valve when water is present.



<a href="http://www.spiraxsarco.com/us/pdfs/TI/ti-4-006-us.pdf">http://www.spiraxsarco.com/us/pdfs/TI/ti-4-006-us.pdf</a>



<a href="http://www.nyrpcorp.com/sarco-air-eliminator-sa69843">http://www.nyrpcorp.com/sarco-air-eliminator-sa69843</a>



I do not know the diameter for the valve port passage and if it is too small, it might not provide for enough venting. However, if operated in vacuum by adding a swing check valve, venting becomes less of a concern.

JStar

Air Eliminator

Awesome find! For that price, I'll try it on the next job. We would easily spend that much money on a bunch of Gorton #2's anyway. The only drawback is that it would not hold back steam if a few return traps went bad.