Thread: refill your disposable canisters

gentlemen -this bloke obviously knows his stuff .having read it his advice is definitely cheaper than an undertakers bill and the bill for the post match function (he cant be here but deep down hes a nice guy so drink up and have another on him) so Im firmly in his court.
BTW I also have a long standing aversion to things that can bite me or inflict pain -gases and electricity are top of the fucking aversion list.

LPG (propane) gas cylinder-bottle pressure chart
Temp Temp Pressure Pressure Pressure
ºC ºF kPa PSIG Bar
70 158 2482 360 24.8
60 140 2013 292 20.1
54 130 1794 257 17.9
43 110 1358 197 13.6
38 100 1186 172 11.9
32 90 1027 149 10.3
27 80 883 128 8.8
16 60 637 92 6.4
-1 30 356 51 3.6
-18 0 152 24 1.5
-29 -20 74 11 0.7
-43 -45 0 0 0
Note: Some numbers have been

I was going to put a pt for butane up as well but having trouble getting a screen shot from my phone to my tablet.
The pressure at 30 deg isn’t much different.
It’s illegal to refill a disposable cylinder but most will cope with either gas pressure.

Ok.

If you are gonna be so cheap you have to look for ways to squeeze the gas, maybe you have bigger problems..... most of the time I'm using Hexi or Meths, cheaper than gas by the way...... so the gas canister thing isn't a bugger for me, occasionally go gas cause I've got shitloads of canisters.

Is this whole refill canisters thing about being cheap? or not knowing how much you have left?. Both problems solved by changing your fuel methodology. Or carrying two canisters if no 2.

In the mornings I generally heat water till just hot to touch then disconnect and put the can of gas in the warm water for a couple of min and reconnect and continue cooking.
My issue is keeping the gas warm enough to supply enough pressure to the cooker especially as boiling off liquid has a refrigerant effect, I dont hunt in +30c temps tho and YMMV.

That's called evaporative cooling Cam, you might see that as ice forming on the outside of the canister sometimes even if the ambient air temperature is not below freezing. You've sussed one of the ways around it with sitting the canister in the warm water. The other way is using a stove that can handle liquid feed and inverting the canister.

I won’t mention how my mate warms a can up as K95 will have a heart attack I just chuck mine in my sleeping bag at night if I’m camping somewhere cold.

Get one of these https://www.mtngear.nz/product/gas-c...refill-adaptor $10 great for using up all those half/ quarter full cans you have lying around, and you can buy the large size ones and decanter into your smaller ones, save a few $$

Originally Posted by outdoorlad

I won’t mention how my mate warms a can up as K95 will have a heart attack I just chuck mine in my sleeping bag at night if I’m camping somewhere cold.

Get one of these https://www.mtngear.nz/product/gas-c...refill-adaptor $10 great for using up all those half/ quarter full cans you have lying around, and you can buy the large size ones and decanter into your smaller ones, save a few $$

I've seen some inventive ways. I'm not trying to be the fun police I just think there is a genuine ignorance of the risks with most people.This thread has over 15,500 views and no one had pointed out it's not a bright idea. We're all clued up about reloading and safety around that, our gas cookers are probably the only other thing we take with us in the hills that could explode. You're only going to be better equiped to make your own decisions around them if you learn a bit about them.

Originally Posted by outdoorlad

I won’t mention how my mate warms a can up as K95 will have a heart attack I just chuck mine in my sleeping bag at night if I’m camping somewhere cold.

Get one of these https://www.mtngear.nz/product/gas-c...refill-adaptor $10 great for using up all those half/ quarter full cans you have lying around, and you can buy the large size ones and decanter into your smaller ones, save a few $$

That was quick.

Sent from my S60 using Tapatalk

It seems to me that we have more incidents with improper use rather than refilling.
I agree with @R95 that a warning should be given to anyone considering refilling, I’m just not sure you can stop some people hurting themselves.

Originally Posted by 2post

It seems to me that we have more incidents with improper use rather than refilling.
I agree with @R95 that a warning should be given to anyone considering refilling, I’m just not sure you can stop some people hurting themselves.

Absolutely agree with you 2post. Refilling seems to have just become a "thing" recently though. As long as I've thrown out some info for people to consider I've done my part.

Some good visual data on the gases here. Note at 30C (90F) 100% Propane has 5 times the vapour pressure of 100% Butane and the difference increases with higher temperature: https://www.engineeringtoolbox.com/p...ix-d_1043.html

And an interesting video showing a couple types of valve systems: https://www.youtube.com/watch?v=lpJQ5V6PQ4k

I'm gonna leave it at that people, better livin' .

These type had an issue some time back where you had to turn the top over (it was turn upside down for packing) before use otherwise it blew up.
Having any fuel under pressure near a flame is asking for trouble.

We dont get 100% propane tho do we, its about 60/40 for lpg?

Originally Posted by veitnamcam

We dont get 100% propane tho do we, its about 60/40 for lpg?

Yes we do, refer to the post I did a page back. "LPG" the stuff you buy for your BBQ in New Zealand is typically 60:40 Propane/Butane. Pause that video I posted at 0.57 and have a look at that chart in the background. The top line is 100% Propane, the bottom is 100% Butane. The ones in the middle are mixes and Isobutane. Should be clear what I'm getting at. It's all there for you now, make your own minds up. I really am gone now.