CO2 - New refill @ 700 PSI?

[Montreal Ray]

Hi,

I just got my bottle back from the gas company and I'm only getting 700 PSI on a freshly filled 5 pound bottle.

This is my first CR and experience with CO2. Considering the gauge says "time to refill" at 500 PSI, 700 seems low for a fresh refill?

The bottle feels very cold to the touch, it's been sitting in my basement for about 8 hours since I got it back from the gas company.

What is the typical new fill PSI for a 5, 10 and 20 pound bottle?

thanks,
Ray

 

[NCSUsalt]

CO2 pressure will depend on many variables, the temperature of the bottle being the biggest. 700 psi sounds about right if the bottle is extremely cold from them just filling it and you left it in a cold basement. as the bottle warms and more liquid attempts to turn to gas the pressure will probably increase to right around 800psi.
you also can't really tell exactly how much is in the bottle from the pressure, your best bet is to weigh the tank before and after you fill it. i usually refill the tanks when they get down to showing around 200psi but there will still be a decent amount of CO2 left in the bottle.

 

[LaOtIn]

is the bottle heavier than when you took it in? if yes, then its got more, if no, then they ripped you off

<-----years of paintball playing teaches you a thing or 2 about CO2 and HPA bottles

 

[Montreal Ray]

CO2 pressure will depend on many variables, the temperature of the bottle being the biggest. 700 psi sounds about right if the bottle is extremely cold from them just filling it and you left it in a cold basement. as the bottle warms and more liquid attempts to turn to gas the pressure will probably increase to right around 800psi.
you also can't really tell exactly how much is in the bottle from the pressure, your best bet is to weigh the tank before and after you fill it. i usually refill the tanks when they get down to showing around 200psi but there will still be a decent amount of CO2 left in the bottle.

Ahh cool man, I'll put the bottle right up next to a really hot heater to warm it up....


Just kidding


I see what you are saying. I will weigh it next time around.

I assume it's like a car gas guage...where the first 1/4 tank will do 300 miles and the last 3/4 will do 100?

thanks NCSUsalt

Ray

 

[tkeracer619]

Its not like that.

The bottle will seem full or close to full until it runs out of gas. It will then drop pressure fast.

It is more like a gas gauge that will take you 95% of the way on F then drops to E within 5 miles.

 

[Montreal Ray]

is the bottle heavier than when you took it in? if yes, then its got more, if no, then they ripped you off

<-----years of paintball playing teaches you a thing or 2 about CO2 and HPA bottles

Feel heavier...but I did not weigh it :-(

 

[Montreal Ray]

Its not like that.

The bottle will seem full or close to full until it runs out of gas. It will then drop pressure fast.

It is more like a gas gauge that will take you 95% of the way on F then drops to E within 5 miles.

That sucks, the refill shop keeps the bottle for 3 days when it's time to fill. I either need a second bottle or need to find a new shop.

 

[tkeracer619]

Beer and tap store is the place to go to.

I rent my bottle from them and each time I take the tank they swap it for a freshly painted one for about $14.

I put down an $80 deposit 3 years ago that I get back if I ever stop renting the bottle.

It takes them about 2 minutes to fill a bottle. How do they stay in business with a 3 day turn around?

 

[poolkeeper1]

Any Welding shop has them on an exchange basis, Bring an empty take a full one. Around 14.00 for a 20lb tank around here, It lasts a long time that way.
Bill

 

[Montreal Ray]

Beer and tap store is the place to go to.

I rent my bottle from them and each time I take the tank they swap it for a freshly painted one for about $14.

I put down an $80 deposit 3 years ago that I get back if I ever stop renting the bottle.

It takes them about 2 minutes to fill a bottle. How do they stay in business with a 3 day turn around?

wow that's great!

They are a very large gas supplier. I got the feeeling like they did not want to do biz with the little guy with the little bottle.

I guess Id better start looking for someone who can do same day refills.

thanks!

 

[Montreal Ray]

Any Welding shop has them on an exchange basis, Bring an empty take a full one. Around 14.00 for a 20lb tank around here, It lasts a long time that way.
Bill

Whoa, I paid $32 for 5 pounds.

I'm in Canada, everying is double the price lol

 

[PurdueWaterGuy]

The CO2 in the tank is under enough pressure to liquify, just like the LP tank on a gas grill. So the pressure stays more or less constant until you run out of liquid, then it drops fast. Larger liquid-phase cylinders will have the numbers for empty and full weights stamped on the side of the valve. In critical applications the cylinder sits on top of a set of digital scales to keep the user informed as to how much is left in the tank.

Yeah, I know, I need to get out of the lab more often.......

Hi,

I just got my bottle back from the gas company and I'm only getting 700 PSI on a freshly filled 5 pound bottle.

This is my first CR and experience with CO2. Considering the gauge says "time to refill" at 500 PSI, 700 seems low for a fresh refill?

The bottle feels very cold to the touch, it's been sitting in my basement for about 8 hours since I got it back from the gas company.

What is the typical new fill PSI for a 5, 10 and 20 pound bottle?

thanks,
Ray

 

[hvacman250]

Think like propane gas; stored as a liquid, converts to vapor before being used. When the liquid is used up, pressure rapidly drops. Also, pressure and temperature go hand in hand. Higher the bottle temp, higher the pressure. Most tanks have a burst disk somewhere in the 1500-1800 psi neighborhood if the tank pressure were to rise to high (by high temps)

I cant tell you how many times a paintballer would put his CO2 bottle on a hot car hood or leave it in the sun. 5 minutes later, you get a loud pop!, then 5 minutes of liquid CO2 hissing out.

BTW, they should be weighing the CO2 in. If you have a 5 lb cylinder, they should weigh in 5 lbs. Or some do 80% capacity as a safety measure.

 

[hvacman250]

Might want to try a paintball shop too, if in a pinch. Or do you Canadians play paintball?

 

[Montreal Ray]

The CO2 in the tank is under enough pressure to liquify, just like the LP tank on a gas grill. So the pressure stays more or less constant until you run out of liquid, then it drops fast. Larger liquid-phase cylinders will have the numbers for empty and full weights stamped on the side of the valve. In critical applications the cylinder sits on top of a set of digital scales to keep the user informed as to how much is left in the tank.

Yeah, I know, I need to get out of the lab more often.......

Think like propane gas; stored as a liquid, converts to vapor before being used. When the liquid is used up, pressure rapidly drops. Also, pressure and temperature go hand in hand. Higher the bottle temp, higher the pressure. Most tanks have a burst disk somewhere in the 1500-1800 psi neighborhood if the tank pressure were to rise to high (by high temps)

I cant tell you how many times a paintballer would put his CO2 bottle on a hot car hood or leave it in the sun. 5 minutes later, you get a loud pop!, then 5 minutes of liquid CO2 hissing out.

BTW, they should be weighing the CO2 in. If you have a 5 lb cylinder, they should weigh in 5 lbs. Or some do 80% capacity as a safety measure.

Hmmm, I guess my wife can now stop stressing about what to buy me for Xmass! I scale!

Thanks guys!

Might want to try a paintball shop too, if in a pinch. Or do you Canadians play paintball?

Yeah, we play but we use Snow and Ice instead of paint. Packs a punch.

thanks!

 

[LaOtIn]

Might want to try a paintball shop too, if in a pinch. Or do you Canadians play paintball?

yeah they play, haha, i played against a team from Toronto, Canada 2 years ago at a meet in Tampa, FL

good team, cant remember their name, but we soundly beat em anyway 1-4 matches :celeb1: