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Is this purge behavior normal ?
Posted: Sun Jul 23, 2017 8:58 am
by tarzan11_11
In our Knauer HPLC pumps,
the moment I open the purge valves, the solvents start flowing out, without me even hitting the purge button .. is this normal ..?
with best wishes
Re: Is this purge behavior normal ?
Posted: Sun Jul 23, 2017 12:11 pm
by uzman
It is normal , if the solvent bottle is over the pump , solvent goes out by gravity.
Re: Is this purge behavior normal ?
Posted: Sun Jul 23, 2017 4:28 pm
by HPLC chemist
Yes (depending on the construction). That does not mean the solvent is going through the pump only the lines are clear of bubbles. Thus, you are not likely to suck more bubbles into the pump.
Re: Is this purge behavior normal ?
Posted: Mon Jul 24, 2017 5:50 am
by Organic_chemist
yes, this is normal and once I forgot to close the purge valve and the next morning there was not solvent in the bottle.
