Calculating Output Pressure for 15L N2/min

[jvrkoo]

Hello, i’m not good in physics so I came here for help. I have a high pressured gas tank (200 bars) and a flow rate regulator. I need to release 15L of nitrogen per minute, but my regulator only measures output pressure between 0 and 400 bars (0 - 6000 psi). How do I measure the output pressure accordingly? Thanks

 

[Baluncore]

Welcome to PF.

Why do you need to read outlet pressure? You could simply adjust the flow rate regulator.

MIG and TIG welding uses pressure regulators, flow regulators and flow meters to control the flow of shielding gas. You will be able to find some solutions on eBay, a similar website, or your local welding equipment supplier.

Pay attention to the screw fittings used to connect the cylinder to the regulator.

Maybe you can explain what you are using it for, how accurate the flow must be, and how long it must run unattended.

 

[jvrkoo]

I didn't quite understand your answer so I will add details.
Here is the kind of flow rate regulator I have : https://www.tireusesabiere.fr/reducteur-de-pression-azote-n2-1-conduite/a-963/
As you can see, it displays the output pressure in bars or psi, but I need to read and adjust the output flow in liters per minute. It doesn't have to be that accurate.
Thanks anyways

 

[Baluncore]

Does the second pressure gauge indirectly display the flow rate, or the output pressure due to following equipment?

You need to be able to calibrate the flow rate regulator. There are many ways of doing that.

 

[jvrkoo]

I think it displays the pressure inside the bottle, in my case around 200 bars. Can you help me out to regulate the flow accordingly?

 

[Baluncore]

The regulator you show is a pressure regulator.
The gauges show the supply pressure and outlet pressure.
It is preset to a fixed output pressure.
It is NOT a flow regulator.

This is a flow gauge and flow adjuster.
https://www.ebay.com.au/itm/404001797186
You might use it with the pressure regulator you have.

How do you use the N2 gas?
Is it released into the atmosphere or some other pressure?

 

[jvrkoo]

Ok I understand better now, thanks. The n2 is released into a hose, how is it any different?

 

[Lnewqban]

Ok I understand better now, thanks. The n2 is released into a hose, how is it any different?

Do you know the pressure that will be inside that hose while the flow of 15L of nitrogen per minute is happening.
For the same volume or volumetric flow, the mass of the transferred gas depends on the pressure.

 

[jvrkoo]

No, I don't really know. Is it really impactful or does it make a slight difference?

 

[Baluncore]

No, I don't really know. Is it really impactful or does it make a slight difference?

It may be impactful.
What is the N2 gas used for?
Why do you need 15 litre/minute of N2 gas to flow?

 

[jvrkoo]

For medical purposes.

 

[Baluncore]

1. For what medical purposes is the N2 used?
2. Who will pay for the gas?

 

[jvrkoo]

I will, but is that really relevant regarding the topic?

 

[Baluncore]

I will, but is that really relevant regarding the topic?

YES, it is essential.

 

[Baluncore]

There is a language translation problem.
We do not know what you are doing.
You are carrying out an unspecified medical procedure.
You have insufficient knowledge to operate the equipment you intend to use.

I do not want the liability of helping you injure or kill your victims.

 

[Mark44]

Thread closed for these reasons:

There is a language translation problem.
We do not know what you are doing.
You are carrying out an unspecified medical procedure.
You have insufficient knowledge to operate the equipment you intend to use.

I do not want the liability of helping you injure or kill your victims.