Rescue a Balloon With a Helium Transfusion
Intro: Rescue a Balloon With a Helium Transfusion
Helium is a tiny little molecule that tends to escape through the walls of balloons, causing them to become non-boyant and sad. Normal rubber balloons usually die overnight, while the more expensive "mylar" balloons (which aren't really mylar at all, but usually a nylon/polyethylene double-layer film) gradually lose their helium over the space of a couple of weeks, become shrunken and ill before finally sinking to the ground, dead.
But the life of your favorite balloon can be extended indefinately by the sacrifice of its less-loved brother and sister balloons, if you preform Helium Transfusions!
But the life of your favorite balloon can be extended indefinately by the sacrifice of its less-loved brother and sister balloons, if you preform Helium Transfusions!
STEP 1: You Will Need
You will need the balloon you want to preserve, a sacrificial balloon to provide helium, and a long hollow tube of some kind that is small enough in diameter to be shoved up the valve stems of the balloons. I think the tube show here is from a kid's pinwheel. I've also used a piece of insulation from a cat5 cable, an SMT IC tube, and a fiberglass kite spar. A soda straw tends to be a little too short, and a little too fat, but you might get one to work.
STEP 2: Drill for Helium
Most "mylar" helium balloons have a built-in one-way valve that consists of a flat tube of plastic that extends into the body of the balloon. Gas flowing in expands the tube and has no problems. Gas trying to get out tends to collapse the tube, so no passages is possible. It works really well. Some balloons have an additional self-adhesive layer to seal the tube shut, in which case you may be out of luck.
Find the opening for the inflation value on the step (usually) of the sacrificial balloon, and shove one and of your transfusion tube gently through the valve-stem until it escapes the far (internal) opening of the valve. This is usually 6 to 10 inches. Now your tube is holding the valve open, and helium can escape through the tube (You should be able to feel some if you squeeze the balloon.)
Find the opening for the inflation value on the step (usually) of the sacrificial balloon, and shove one and of your transfusion tube gently through the valve-stem until it escapes the far (internal) opening of the valve. This is usually 6 to 10 inches. Now your tube is holding the valve open, and helium can escape through the tube (You should be able to feel some if you squeeze the balloon.)
STEP 3: Inflate the Patient Balloon
Insert the other end of the tube into the valve stem of the balloon you are trying to save. You don't need to go very far up the stem on this side; the gas is going to be flowing the way that the valve is designed to allow. Now, holding both balloon necks to keep them from coming off of the tube, squeeze the sacrificial balloon, and helium show flow from it into the balloon you're rescuing. Keep squeezing until either the sacrificial balloon is as empty as you can get it, or the patient balloon is full and firm. You may have to repeat the last steps with several sacrificial balloons if your balloons are really empty.
STEP 4: Recycle the Sacrificial Balloon
You can use the tube to suck the rest of the helium out of the sacrificial balloon(s), returning them to something resembling their initial uninflated state. If there's substantial helium left, amuse your friends and family by talking with a lung full of helium, and remember to occasionally get your lungs full of regular oxygen-containing air as well.
Once the balloon is fully deflated, it can be stored easily and saved for future occasions. It's probably not economical to rent your own helium tank to re-inflate old balloons, but once you've collected a whole bunch you can consider doing things like inflating them with regular air and filling your house/office/whatever-mates room with them :-)
You can also use this technique for deflating "collectable" balloons to save them (like those nice expensive balloons from Disneyland), and eventually for saving your favorite party balloon.
Once the balloon is fully deflated, it can be stored easily and saved for future occasions. It's probably not economical to rent your own helium tank to re-inflate old balloons, but once you've collected a whole bunch you can consider doing things like inflating them with regular air and filling your house/office/whatever-mates room with them :-)
You can also use this technique for deflating "collectable" balloons to save them (like those nice expensive balloons from Disneyland), and eventually for saving your favorite party balloon.
STEP 5: Enjoy the Rescued Balloon
Doesn't it look happier now?
32 Comments
thoughtstorms 12 years ago
mrmath 17 years ago
I did hear, by the way, that two consecutive lungfuls of helium will render you unconcious. The helium prevents the oxygen from getting in, of course. It can be so dangerous, that you can die.
So, while I'll probably do it my self next time I'm around a helium balloon but not my kids, don't inhale helium.
LasVegas 17 years ago
mrmath 17 years ago
westfw 17 years ago
mrmath 17 years ago
westfw 17 years ago
- I provided the link for a reason. It is a medical fact that two lungfuls of helium, from a balloon or a tank, taken without a breath in between, will make you pass out.
I'm sorry; you provided a link that was a search query. I looked at several of the links and didn't see one that supports that particular claim, and several that said things like "unconciousness occurs after a couple of minutes" and "death is relatively certain after 10 minutes" (suicide sites; creepy...) Do you have a more specific link?mrmath 17 years ago
I didn't mean for this to degrade into a debate about the dangers, or lack there of, of helium.
I did find a link that indicates:
...while it is true that helium itself is nonthreatening, inhaling it has been known to cause asphyxia...
And
Henry Wickes Jr., a consultant with Madeley Safety Engineers in Texas, wrote... "Depending on how completely oxygen is replaced by helium, you may lose consciousness quickly and without warning,”
The two lungful stat the I gave out was from a demonstration given by a cryogenics expert from Praxair, so I can't give you a link specific to that.
In my search for more specific links I came across one that said that the desire to breath comes from a build up of carbon dioxyide in your lungs, and since inhaling helium doesn't allow for this, you can die from aphyxiation without feeling staved for air like. But, I lost the link while searching, and can't provide it here.
The confrontational nature of my previous posts was not intended, and I apologize for coming across as such.
lemonie 17 years ago
jkyas 17 years ago
lemonie 17 years ago
westfw 17 years ago
Another Balloon site (the first I could find with actual prices listed) will rent you an 80ft3 tank of helium for a week (ie you can use up all the helium) for $35. And this USGS report lists the commodity price of helium as about $11000/ton. While that's expensive compared to (say) nitrogen, it's still cheap enough to be used extensively in welding, where it's simply allowed to float way after keeping the O2 off your weld.
CameronSS 17 years ago
westfw 17 years ago
westfw 17 years ago
carbon 17 years ago
It's been done. :P
fkuk 14 years ago
carbon 17 years ago
Saved you the trouble. ; )
I used several different computers, so you milage may vary with this.
lemonie 17 years ago
sehrgut 16 years ago