I think there was a bit of confusion before, from previous posts I read, about the conversion rate for using nitrogen with an argon flowmeter. But it seemed eventually people settled on the conversion rate of 1.19. You multiply the argon regulator litres per minute(LPM) reading by 1.19 to give the actual nitrogen flowrate.
So:
- 12.5LPM on argon flowmeter gives ~15litres LPM nitrogen flow
- 15LPM on argon flowmeter gives ~ 18LPM nitrogen flow
- 20 LPM on argon flowmeter gives ~ 24 LPM nitrogen flow
Or do the opposite, and multiply the nitrogen flowrate you want by 0.84, to give the argon regulator rate you need to set.
E.g. -15(LPM nitrogen flowrate you want) * 0.84 = ~12.5 (argon LPM regulator setting).
- 25
(LPM nitrogen flowrate you want) * 0.84 = ~ 21(argon LPM regulator setting).
Etc.
Here's the conversion chart people previously used.
View attachment 131926
They give an example, using helium with an argon flowmeter. The website used standard cubic feet per hour (SCFH). It's the same conversion for litres per minute (LPM).
Their final result should say 'Actual
Helium Flow', not 'Actual
Argon Flow'. That was a mistake on their part:
View attachment 131927
If you're still worried about it, then you may be more comfortable using a nitrogen regulator with nitrogen. You have 3 options:
1)Nitrogen regulator with floating ball flowmeter(Litres per minute (LPM) or Standard cubic feet per hour (SCFH), which can be converted to LPM:
View attachment 131930
2)Nitrogen regulator with litres per minute gauge:
View attachment 131931
3)Nitrogen click-style regulator:
View attachment 131933