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Old 01-28-2007, 11:01 PM
84Z 84Z is offline
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2 nitrous bottles, w/ bottle heaters?

I was wondering. If I run 2 nitrous bottles, and both are open. And after they connect to the y fitting, I put the pressure sensor there. Will it sense 1800 psi if both tanks are at 900? Also, could I wire up 2 bottle heaters from one pressure sensor like that, even if I turn one off?

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Old 01-28-2007, 11:23 PM
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If both tanks were connected at 900 PSI each you would still have 900 PSI. You may have increased the overall mass but the mass is all at the same pressure. If you were to empty one bottle into the other then the pressure would go up.
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Old 01-28-2007, 11:28 PM
84Z 84Z is offline
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so could i connect the pressure sensor after where the 2 bottles connect and connect both bottle heaters to this pressure switch? I'm mainly doing it for a partially hidden nitrous set up. The one hidden bottle will be on a remote opener, so if I'm in a race and I'm forced to turn the one off, I can flip the other one on. Then after the race I can turn both and and equalize it. Will this work out? if both heaters are connected to the one pressure sensor, even if one bottle is off, is there a better way to do this?
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Old 01-29-2007, 01:18 PM
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The main problem with connecting your heater to the line after the valve is that you can turn it on without the bottle being open. If your pressure relief valve fails you could have a catastrophic failure to the bottle. The pressure transducer for the bottle heaters should be installed into the bottle valve itself. This way it senses what the bottle is seeing, not the line between the bottle and system.
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Old 01-29-2007, 01:53 PM
84Z 84Z is offline
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so if I run 2 bottles I should have 2 heating sources independent of each other
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Old 01-29-2007, 01:55 PM
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Quote:
Originally Posted by 84Z
so if I run 2 bottles I should have 2 heating sources independent of each other

Definitely. If you have a sensor go bad, or the heating element short you want them completely separate.
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Old 01-29-2007, 02:37 PM
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Quote:
Originally Posted by topdogger
If both tanks were connected at 900 PSI each you would still have 900 PSI. You may have increased the overall mass but the mass is all at the same pressure.

If you were to empty one bottle into the other then the pressure would go up.
What?????

You can't take a 900 psi full bottle and empty it into another 900 psi full bottle.

For 2 reasons:
1) There is insufficient volume in either container to hold the liquid. Liquid is non compressable. i.e. You can't put 10 pounds of beans in a 5 pound sack.

2) There would be no transfer of flow, bottle to bottle, if the pressures are equal, regardless of the % of volume in either container.

Even if you hooked one 5 pound size bottle to one 20 pound size bottle, the pressures would still equalize even though the liquid contained are different.
(It is like 30 psi in an earthmover tire is still like 30 psi in a car tire. If you hook them together with a hose, the big tire is not gong to explode the little tire)

example, If you have two bottles of equal size and temperature, and had one bottle at 900 psi and one at 600 psi and then hooked them together, they would balance somewhere around 750.

The higher pressure bottle feeding some of its "pressure" into the lower pressure bottle.

The pressure between the two bottles, when hooked together, would equalize, as you first stated, and they would function as one big bottle.
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