Method Exit bag and inert gas megathread

[ClownWorld2023]

CO2 buildup not relevant for EEBD hood at all, because it's purged through the exhale valve?

Do I need to worry about stuff like the visor mask not sealing properly, and leaking exhaled air into the hood?

 

[DeadHead]

Not sure if this is what ur looking for but your regulator must be able to support the cylinder's working pressure. For examply, if you're cylinder operates at 200bar (2216psi) and your regulator is desgined for 150bar (2015psi), you'll need to bleed out some of the gas b4 using it with the regulator.

So if my tank is 137 bar, what must the outlet pressure of the regulator be?

 

[NoFutureAnymore]

So if my tank is 137 bar, what must the outlet pressure of the regulator be?

The regulator has to support a pressure equal or higher then 137 bar. That seems to be the general rule of thumb for all inert gas methods. A higher cylinder pressure can damage equipement, but lower pressure can't. If you think logically, the pressure will always go down in the cylinder while using gas. The second thing you have to look at are the connection sizes which have to match between equipement and cylinder.

 

[anonaon]

CO2 buildup not relevant for EEBD hood at all, because it's purged through the exhale valve?

Correct

Do I need to worry about stuff like the visor mask not sealing properly, and leaking exhaled air into the hood?

No, the hood's quite durable. Just dont crumple it in storage

So if my tank is 137 bar, what must the outlet pressure of the regulator be?

137 or above but dont worry about this. If your regulator is designed for its respective gas, it'll work. Otherwise welders would be out of jobs

 

[dustinspector]

What regulator would I need for a 125cu/ft tank of Nitrogen?

 

[Mare Imbrium]

What is the right size of an exit bag?

I have to sizes of oven bags - 43x45 cm, which is too small for me, and 55x60 cm, which is too big.

What is your opininion? Which size do you have?

 

[bythefire12]

I don't really understand how this all works despite reading for EEBD hood.

First, I need to find a place that sells a Drager hood.

Then I need a ACU-200 Regulator. The only one I found is argon/co2. Will that be a problem?

Then I need two couplers: CEJN, 1/4NPT, Series 344, and a male-male CGA-032 to 1/4".

The regulator connects directly to the nitrogen tank? Then one of those couplers connects to the regulator, and another to the mask hose? Then you connect the coupler coming out of the regulator to the one at the end of the mask hose?

Am I even in the right ballpark? I've never worked with any of this stuff.

 

[ztem]

Cylinder<->Regulator<->CGA-032 to 1/4" NPT<-> Drager CEJN 344 with 1/4" NPT"<->Hood

Will that be a problem?

Never.

The regulator connects directly to the nitrogen tank?

Y.

 

[bythefire12]

Does anyone know good places to get the Drager hood?

 

[ExpiredLion]

The bouncing ball flow meter that I have attaches at an angle to my regulator. Is it safe to slightly tilt the tank in order to get the flow meter to be totally perpendicular with the ground and adjust the rate that way? Since otherwise I would think the flow rate is not going to be accurate if it is tilted and having gravity act on the ball at an angle.

I'm unable to upload a picture but essentially it is one of those test tube looking flow meters like this https://www.wtfarley.com/assets/images/other flowmeters/nf-1b21.jpg and the regulator looks like this https://m.media-amazon.com/images/I/61OKqxZf3qL._AC_UF894,1000_QL80_.jpg

 

[ClownWorld2023]

What is the right size of an exit bag?

I have to sizes of oven bags - 43x45 cm, which is too small for me, and 55x60 cm, which is too big.

What is your opininion? Which size do you have?

I had ordered multiple sizes myself. My 43x55 bags fit best.

Does anyone know good places to get the Drager hood?

What region? US , EU ?

 

[Mare Imbrium]

Thanks for information.
For me seems 43x55 cm small, maybe because my seam is broad.
55x60 gives a good space for nose and mouth.

 

[ClownWorld2023]

Thanks for information.
For me seems 43x55 cm small, maybe because my seam is broad.
55x60 gives a good space for nose and mouth.

If pre-filled properly then that should work fine.

 

[Mare Imbrium]

Will you use this bag for your ctb?
Did you already made a "blackout test"?

 

[ClownWorld2023]

Will you use this bag for your ctb?
Did you already made a "blackout tesr"?

I will most likely use an EEBD hood.

I did not do a blackout test yet.

 

[Mare Imbrium]

Is for you the exit bag too unsecure?

 

[DeadHead]

Correct


No, the hood's quite durable. Just dont crumple it in storage


137 or above but dont worry about this. If your regulator is designed for its respective gas, it'll work. Otherwise welders would be out of jobs

It's not, it's a argon reg that I'd be using with a nitrogen tank. Vendor claims you can't use the reg for nitrogen, but as far as I know you can

 

[ClownWorld2023]

Is for you the exit bag too unsecure?

Yes I rather use something more straightforward.

Too much ambiguity involved with the plastic bag.

 

[ztem]

I don't recommend the Drager PSS rescue hood anymore.Two people bought it and have problems with the hood's exhalation valve.From now on, only use hoods that have an internal mask like the Chinese(used by EM's customers and Vizzy and bennydiazapine) or Drager Saver CF or 3M Scott.

 

[MG_39]

I don't recommend the Drager PSS rescue hood anymore.Two people bought it and have problems with the hood's exhalation valve.From now on, only use hoods that have an internal mask like the Chinese(used by EM's customers and Vizzy and bennydiazapine) or Drager Saver CF or 3M Scott.

Do you know if the 3M Scott male coupler is the same as Dräger PSS? (And yes I know I can cut it off and use a barb fitting on my regulator instead, or cut it off and replace the male coupler.)

I can't find any information about the 3M Scott coupler except that it's a CEJN 340 series, my female coupler for my regulator is a Rectus though, and struggle to find good data sheets. But I know I have the correct female coupler for Dräger PSS.

 

[ztem]

my female coupler for my regulator is a Rectus

That's compatible with the 3M Scott.

if the 3M Scott male coupler is the same as Dräger PSS?

The plug of those two hoods are not the same, the Drager's plug is CEJN 344 and the 3M Scott's plug is CEJN 340 and both of them are compatible with the Rectus 95KS coupler.

 

[Dmoore3232]

Would these EWOT masks work? How does the CO2 get let out? Where does that go?

 

[winterparty]

Would these EWOT masks work? How does the CO2 get let out? Where does that go?

Hi I think they would be less comfortable than a eebd hood if you were to ask me because you can pre-fill a hood with nitrogen and shorten the length of time till you're unconscious. If you need any help I'm still alive and can help you

 

[ClownWorld2023]

Would these EWOT masks work? How does the CO2 get let out? Where does that go?

Are those things expensive?

What price range are we talking about?

 

[RazorWing]

Hello, I am from the UK. I have been reading a number of threads on this site about the Exit Bag, SCBA and EEBD. I have been able to identify where I can purchase the equipment to make the exit bag and a nitrogen cylinder is really easy to obtain without anyone asking questions. I am now exploring SCBA as I would be more comfortable wearing a mask than covering my head with an exit bag or EEBD.

I may have missed it but is it down to choice as to if someone chose SCBA over EEBD or is EEBD safer? There seems to be allot of discussion regarding EEBD which leads me to believe it maybe a more recommended approach.

In the UK the cylinder has a BSP 5/8 connection and the regulator has a BSP 5/8 to BSP 3/8 as pictured. For the exit bag approach I was going to get a 3 meter BSP 3/8 extension hose and tape it inside the bag. It sounds as if this would work and would mean the fitting on both the regulator, cylinder and hose would be tightly secure. Please let me know if you see any issues with this?

For the other two methods it doesn't seem as straightforward although I would prefer them over making my own bag. Branded SCBA/EEBD seems to be really pricey as noted by others and I am really struggling to find Chinese versions of the mask/hood. Can anyone assist with sources? Also it looks more difficult extending the hose or connecting it to the BSP 3/8 connector. Any advice?

 

[ClownWorld2023]

Hello, I am from the UK. I have been reading a number of threads on this site about the Exit Bag, SCBA and EEBD. I have been able to identify where I can purchase the equipment to make the exit bag and a nitrogen cylinder is really easy to obtain without anyone asking questions. I am now exploring SCBA as I would be more comfortable wearing a mask than covering my head with an exit bag or EEBD.

I may have missed it but is it down to choice as to if someone chose SCBA over EEBD or is EEBD safer? There seems to be allot of discussion regarding EEBD which leads me to believe it maybe a more recommended approach.

In the UK the cylinder has a BSP 5/8 connection and the regulator has a BSP 5/8 to BSP 3/8 as pictured. For the exit bag approach I was going to get a 3 meter BSP 3/8 extension hose and tape it inside the bag. It sounds as if this would work and would mean the fitting on both the regulator, cylinder and hose would be tightly secure. Please let me know if you see any issues with this?

For the other two methods it doesn't seem as straightforward although I would prefer them over making my own bag. Branded SCBA/EEBD seems to be really pricey as noted by others and I am really struggling to find Chinese versions of the mask/hood. Can anyone assist with sources? Also it looks more difficult extending the hose or connecting it to the BSP 3/8 connector. Any advice?

Hi,

I highly recommend getting your post count up so you can use the search function.
This thread is full of valuable information, but some of the information is also scattered around in other threads which are too difficult to find by just browsing.
You really need to use the search function to find the information you want.
It may take hours or even days of thoroughly searching to find all the information you need, but it should be there.




As for your questions, I have some quick answers:

- EEBD is preferred over the plastic exit bag, because generally it's more reliable. The EEBD hood is pre-made and uses durable material compared to the plastic bags.
Also, the EEBD hoods have an exhale valve for getting rid of the carbon dioxide. The carbon dioxide buildup should be much less of a problem compared to the plastic bag, which relies on the displacement of the carbon dioxide using the gas flow.


- SCBA has an important advantage over both the plastic bag/EEBD methods, and that is the significantly reduced gas consumption. Gas is only supplied by the demand valve when necessary (as you breathe in/out), instead of a continuous supply.
This significantly reduces the gas needed, making the method slightly more accessible, because you can use a smaller gas cylinder which is easier to handle and transport.
There might be other advantages I don't know of.

- Chinese EEBD hoods can be found relatively cheap on Alibaba, but I don't know about the quality.

 

[Dmoore3232]

Are those things expensive?

What price range are we talking about?

Like $150 I think, why? would it work?

 

[ClownWorld2023]

Like $150 I think, why? would it work?

If it can seal the face properly without leaks, and has an exhalation valve, maybe?

I don't know anything about that type of mask.

You will need to figure out whether you can connect this to a gas cylinder.
First you need to lookup the specifications, data sheets, manual, etc...

 

[ztem]

Would these EWOT masks work?

Not viable.There are much better setups like Hood/SCBA/SCUBA.

In the UK the cylinder has a BSP 5/8 connection and the regulator has a BSP 5/8 to BSP 3/8 as pictured. For the exit bag approach I was going to get a 3 meter BSP 3/8 extension hose and tape it inside the bag. It sounds as if this would work and would mean the fitting on both the regulator, cylinder and hose would be tightly secure. Please let me know if you see any issues with this?

A side entry regulator would be better.

SCBA/EEBD

~1600£/less than 500£

extending the hose or connecting it to the BSP 3/8 connector

For that you just need 3 hose clamps and a hose barb and double-ended hose barb
and an air hose with 1/4" ID but you don't need to do that, just buy the 3M Scott + Rectus 95KS coupler (with G3/8 female thread).

 

[MG_39]

Edit: According to the gas consumption I estimate, that I breathed Nitrogen for one minute or one and a half minute.

What did you use? bag, eebd? 1-1.5min without losing consciousness sounds like a long time :/