Conversion Factors

[GregP]

Hi guys,

OK, I have a question about air flow units.

I was looking at a piece of Italian equipment which requires compressed air and the air flow requirements are listed in "nl". I was told this means normaliter, but cannot find a normaliter listed in any engineering reference or in any international reference to which I have access.

So, any ideas about what a "nl" of airflow is in standard SI units?

Thanks in advance.

[ygb]

Nanolitres? :D :p

[simon]

I would guess and this is pure speculation, that this is a litre of gas under normal conditions, i.e. Standard temperature and pressure. I will ask at work as I work with a number of welders who obviously deal with compressed gasses, however as I'm in Britain I hold out no hope that any will be at all knowledgable on Italian messurements.

Over to you Taglia...!?! :D

[Pete57]

Hi all

My guess was "numero di litri", i.e. "number of liters (per minute, second or whatever)". I've asked a few co-workers as well who said nowadays a gauge would show "l" (liters) only. But in the old days it could indeed have shown the number of liters per unit of time.

Can't be 100% sure though[?]

[Paolo Tagliaferri]

Never heard about that measure unit ... I'll ask :)

[GregP]

This was a piece of equipment from Italy, made by Seica. If no oine knows, that's OK ... but I was curious.

Thanks anyway!

[Pete57]

Copied the following from http://www.isit100.fe.it/analisi/analisi/unitadimisura.htm
(in Italian)

TABELLE DELLE UNITA' DI MISURA

Multipli e sottomultipli di unità di misura applicabili ai liquidi.

Sigla o simbolo Nome
Valore decimale
Fattore moltiplicativo
(...)
nl
nanolitro
0,000000001(un miliardesimo di litro)
10-9 litri
(...)

I'm ready to bet "nano-liter" is what "nl" stands for. :)

[Paolo Tagliaferri]

Yes ... "nano" is the prefix (like in english I think) that stands for 10^(-9). And like all prefixes can be applied to all S.I. measure units.

IT ----- ||| -- ENG
Nanometro = nanometer
Nanofarad = nanofarad
...
and so on

But i wonder how such a small quantity can be involved in a design schema for an airplane part...What's the exact quantity requirement (the number)? A nano-liter is a millionth of 0.001 liters .... :D

[Paolo Tagliaferri]

Got it!

"nl" stands for "normalitri".
It's a measure unit for compressed gas.
Example: if I have 15 l of a gas at 100 bar (near 100 ATM then) in a can, then i can say I have 1500nl of air in that can (15*100)

U have to thank people on it.comp.cultura.storia.militare Newsgroup :D

[GregP]

Thanks!