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What Is qnl/h and How Do You Convert?
I have some rotameters on site and I expected them to show l/h, but after looking at them it says qnl/h. How do I convert?

I have some rotameters on site and I expected them to show l/h, but after looking at them it says qnl/h. It is simply for setting instrument air for purging purposes, but I'd like to understand how to convert this to l/hour. We might not have the required flow of instrument air but I cannot set anything up until I can convert to what the manual is asking for.

Thanks for any help.

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Loopy,

>I have some rotameters on site....

Would you tell us the manufacturer and model number of the rotameters?

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Q generally designates "flow rate".
NL is normal Liters, Nl/hr means "normal liters per hour".

It is a volumetric flow rate for air (or gas), but calculated to 'normal' conditions, where Normal conditions are a given temperature and pressure whose values I don't recall off the top of my head.

For a discussion on converting, see this link,
http://www.air-compressor-guide.com/questions/converting-nlmin-to-lmin