I'm really confused & overwhelmed by the regulator valve needs, is anyone able to help explain what's needed?
I know brewdog valves aren't recommended so that option is out.
For a 9 litre 137 bar N tank in the UK I'm overwhelmed with the options and have no idea how to work out what is needed.
It is rather confusing to begin with; the key is to just ask a supplier or broker as it were.
As i stated in my previous post, the broker didn't have a clue about pressures/litres etc and therefore they advised me to contact their actual supplier...which i did.
It was as basic as this:
I just asked the assistant how much in litres i would require in order to have a consistent flow of 15lpm (litres per minute) for around 1-1 1/2hrs worth of flowing nitrogen gas...
Quite simply, they just informed me that i would require at least a 9L tank (obviously of compressed nitrogen - which it is anyway).
So, a 9L nitrogen tank @137 bar pressure - It equates to around 1233 litres of nitrogen (compressed gas).
Essentially, you have to then calculate that amount; So 1233 litres of compressed nitrogen running at 15lpm allows you roughly 85 minutes available of nitrogen gas.
Obviously, given that unconsciousness occurs quickly (depends on the individual and how much one inhales at the first few breaths); but lets say you become unconscious in 10 seconds, with a flow rate running at 15lpm with the capacity of the available nitrogen gas around 1233 litres, one has more than enough to ensure ctb and then 'cease to be functioning' (so to speak).
As for the regulator, this has proven a little troublesome for me too...
Essentially though, for the 9L bottle @137 bar, here;s what you'll need:
Most regulators have quite higher levels of bar - I personally haven't seen any below 200bar (tank/bottle pressure).
You will need a regulator that has preferably 2 gauges; one that provides the level of gas available in the tank/bottle, and crucially the second gauge with a LPM (litres per minute) meter.
Some have a Cu.ft (i think) gauge, but if you do the research and ask the suppliers, they will confirm what you'll require and provide you with that.
So essentially, get a regulator that has a gauge which has a minimum bar level at @200bar - With the other flow rate gauge that has a LPM (litres per minute) gauge. Most regulators have an inbuilt 'step-down' pressure release valve in them that reduces the internal outlet pressure down to 10bar - obviously this is to prevent the huge pressure being released from the tank upon opening the valve handle (usually at the top of the tank).
Currently, i have most of my plans now in order. I have the bag constructed, almost completed my letters etc - All i require now is the gas, hose/tubing and regulator...which i have already made enquiries, it's just making the purchase now. Again, i only plan on doing this once and i am not leaving anything to chance of failure.
I am more than happy to assist you with anything - However i will not provide suppliers details.
P.S. As promised, upon the time, i will inform in this thread my final thoughts and say my goodbyes.
All the best ;)