Help using an Argon Gas Flow Regulator with Nitrogen

[emma99]

Okay so i am trying to determine the factor of error whilst using an Argon Gas Flow Regulator with Nitrogen Gas.
Finding the answer to such a question is proving ever more difficult so I ran a test
using half a tank of Nitrogen which initially contained 2 litres of gas at 200 bar

Given that the tank had initially contained 400 Liters of Nitrogen gas and was now at a reading of 100 Bar,
i am assuming that I had 200 Liters of gas remaining.
After setting the regulator to 10 LPM it took 6 mins for the regulator to reach the tank 50 Bar mark.

At this point the flow meter had gone from 10 LPM to 11 LMP so i readjusted the flow meter to give
a reading of 10 LPM and the gas flowed for another 6 mins before the flow rate began to slow down.

This would mean that using a 10 LPM / 11 LPM reading. That 200 Liters of Nitrogen took 12 minutes to deplete.
This would mean that the true flow rate was actually 16 LPM and not 10 LPM.

Any Thoughts?

 

[LittleBit]

bump similar issue. Was hoping to ctb today, but the psi seems to go down way faster that i thought it would.damnit

 

[Msvr]

bump similar issue. Was hoping to ctb today, but the psi seems to go down way faster that i thought it would.damnit

I also had a similar issue. I tested something that @Intoxicated suggested. You can test your flow meter using a water displacement test. Get a container (I used a 18.9L, 5 gallon jug) and another, bigger container (I just used a bathtub. Fill your 18.9L (or whatever size) container with water and flip it upside down inside the bigger container. This will keep all the water trapped in the 18.9L jug. Stick your hose inside the 18.9L container and turn the regulator on. If it takes 1 minute to displace all the water in the jug, you know you are running ~18.9 lpm. I'm using a cheap argon regulaotr, and ran 2 test. I set the flow meter to 15 lpm and the jug emptied in 52 seconds (aka 21.35 lpm.) I then set the flow meter to 12 lpm and it emptied the jug in 62 seconds, which is about 18 lpm N2 flow. My flow meter may be slightly incorrect, or my test slightly skewed. Either way, this test should give a good approximate. I plan to set the flow meter to 12lpm of ctb day. That way 16-18 lpm real flow is good.
Sorry if this was a bit complicated, I'm tired and didn't re-read any of this. Ask questions if you need.

 

[LittleBit]

approximately how much psi or or bars is needed to ctb? dunno if i have enough in my tank anymore >.<.

 

[Msvr]

approximately how much psi or or bars is needed to ctb? dunno if i have enough in my tank anymore >.<.

It depends on how much your tank started with. In the usa a tank has ~2200 psi when full. If the tank now read 1100 psi then that means you are half full. Outside the us I believe tanks have different psi though, so double check in your own country if outside the usa. You should be able to look it up