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Mounting Big Universal Trap Vertically

Posted: Wed Mar 20, 2019 6:45 pm
by MadAsAHatter
Right now the traps are either laying horizontal on the bench or half propped up against the wall. The building people won't let me attach any mounting clips to the wall so I need a some suggestions on how to mount them vertically as recommended. How do you all do it? Pics if you have any would be helpful.

Re: Mounting Big Universal Trap Vertically

Posted: Thu Mar 21, 2019 2:58 pm
by Bigbear
Agilent may have a mount that attaches to the GC.
All of our traps are horizontal, the engineers placed them that way.

Re: Mounting Big Universal Trap Vertically

Posted: Thu Mar 21, 2019 8:59 pm
by benhutcherson
There's always this style that's designed to sit on a bench

https://www.restek.com/catalog/view/3445/22019

I've never used one, but have a few bases(with dead traps) kicking around branded Restek, Varian, and possibly a few other brands.

I wouldn't be too worried personally about the trap orientation, but at the same time if you do think it's important and you can't put mounts in place yourself, is it possible to have the people who ARE allowed to do it come in and do it?

(personally, I hate having traps mounted to the wall, as it's just something else to have to deal with when it comes time to change them-although mine last a REALLY long time given how good the gas quality I get these days is)

Re: Mounting Big Universal Trap Vertically

Posted: Fri Mar 22, 2019 6:01 pm
by LALman
I use a ring stand and a c-clamp to hold mine vertical. My RESTEK Hydrogen trap is only about 1.5" in diameter.

Re: Mounting Big Universal Trap Vertically

Posted: Fri Mar 22, 2019 7:20 pm
by James_Ball
For the Big Universal Trap I normally use as short a piece of tubing I can to attach it to the back of the Agilent GC. With the port being at the top of the back of the GC this holds the trap upright, the bottom I just come out with the tubing and make a 90 degree turn at bench level and use that to support the bottom, just make sure it is a gentle bend and not an extreme right angle. The tubing will hold the trap in place.

I always heard keep them vertical so that if there is any settling of the adsorbent it won't form a channel at the top that lets the gas bypass the adsorvent, and if the flow is vertical up, then it is less likely to compress the packing tighter and restrict flow.