N2O refill stations
02-26-2016, 10:11 AM
#1
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N2O refill stations Looking to start refilling my own bottles. I'm doing about 2 5lb bottles per week. I can get 50 lb bottles from a local gas house.
Basically, at what rate of consumption does it make sense to get your own refill station?
In looking at refill stations on the net, there's a few different brands and configurations. There's an inverted type that is cheap, but there's no scale. How important is the scale? I'd be seriously concerned with overfilling or underfilling if its hot outside (Tejas! Yee haw!)
I also noticed that kits come with 1 of 2 types of pumps. There's the square NOS branded pumps and one that looks like a brick. Anyone have experience with these two pumps?
Basically, at what rate of consumption does it make sense to get your own refill station?
In looking at refill stations on the net, there's a few different brands and configurations. There's an inverted type that is cheap, but there's no scale. How important is the scale? I'd be seriously concerned with overfilling or underfilling if its hot outside (Tejas! Yee haw!)
I also noticed that kits come with 1 of 2 types of pumps. There's the square NOS branded pumps and one that looks like a brick. Anyone have experience with these two pumps?
02-26-2016, 10:47 AM
#2
Scale is critical
You don't need a pump, but they do have benefits.
You can use the thermal/transfer method, you would lose a few pounds from the mother bottle, but only need to freeze your small bottles and use a heating pad on the mother bottle....
You don't need a pump, but they do have benefits.
You can use the thermal/transfer method, you would lose a few pounds from the mother bottle, but only need to freeze your small bottles and use a heating pad on the mother bottle....
02-26-2016, 10:55 AM
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Well with the costs of a heating pad and lost N2O from purging, won't that even out with the price of a pump?
Does the freezing technique work well on 5 lb cylinders? I thought the larger the cylinder, the less it worked?
Does the freezing technique work well on 5 lb cylinders? I thought the larger the cylinder, the less it worked?
02-26-2016, 11:05 AM
#4
Doesn't matter what size it is. Gas wants to flow from hot to cold. Nitrous outlet has a transfer line kit. Can search in the nitrous section. Cheap reliable way. Freeze bottles or bucket of ice water and she will flow. Like said scale is crucial.
02-26-2016, 11:42 AM
#5
ARC makes 120v 900w heating pad with velcro strap.. this will help get the mother bottle pressure a bit higher, and remove the cooling that happens as nitrous is leaving it.
as for 5lb bottles, yes. it will work for any bottle... just freeze it, and the pressure will go down, a simple transfer line and youre in business.
Now, without the heater on the mother bottle, youll get about 40lbs out of the 50lber... with the pump maybe 45lbs if youre lucky.
02-26-2016, 11:47 AM
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I assume you can't extract the full 50 lbs because of the sipper tube height. They're usually a few inches from the bottom of the cyl so its impossible to pick it all up.
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02-26-2016, 01:35 PM
#8
Not always true.... the ones I get have siphon tubes.
and Yes the siphon tube will stop you from getting every pound out, also net losses from the transfer line when you disconnect, and evaporative loss as the liquid level in mother bottle goes down, some liquid evaporates to fill the head space.
and Yes the siphon tube will stop you from getting every pound out, also net losses from the transfer line when you disconnect, and evaporative loss as the liquid level in mother bottle goes down, some liquid evaporates to fill the head space.