I have a question a 20 or 30 pounds or 40 pounds RV tank portable you’re supposed to unscrew the little screw on the side to purge as you feel to have the air escape because Air under pressure creates acid and also conversation a few places I went to said that they don’t do that anymore. That’ll get the water or the air out.
sounds like the tank is being put into auto refrigeration. depending on the conditions if the usage is greater than the amount that the tank is boiling it will stop boiling and it will act like an empty tank but still be half full
I can’t find a number in my code books that it is called for we just shoot for a level close to what we pull down refrigerant systems to which I believe is lower than what is required for propane. Not advice just what we do
Ok, so you fed the 100 gal tank with 1 pint of methanol. Then pulled propane into the tank from the other 100 gal tank until it was even pressure? So, my question is. On a 100 lb tank with a standard POL valve how would you actually purge the tank? Add about a gallon of propane and then open the valve about 5 times to push the air out? Then fill to 20 gallons? I have 2 new 100 lb tanks that both appear to be under vacuum. Should I open the valve until vacuum is gone then fill tank and perform the purge with one gallon?
With a 100 pound tank that has air in it the procedure is to pressurize the tank to 15 psi with propane vapor and then released. Rinse and repeat this procedure 5 times with propane vapor and they deem the amount of potential air in the system to be minuscule enough to not be an issue and will eventually work its way through the system
If the tanks are under a vacuum we normally put half a pint of methanol in for a 100 pounder. If you don’t have a system to inject propane vapor in but you inject liquid in I wouldn’t worry about releasing vapor. If the tank is under a vacuum it means there is an absence of air which is ultimately you’re looking for so once the liquid propane vaporizes and fills the tank you should be ok
@@cyoungso if the tank just has air in it yes I wouldn’t attempt it with propane vapor present in the tank. Most new tanks come to us under a vacuum but it is still standard procedure to add methanol and to bring up to positive pressure with vapor through the service valve
I just just purchased two 100 pound tanks and the guy didn’t tell me they had to be purred. They were vacuum purge and he just built them up without saying anything. What should I do?
tough to say without being there hopefully they were actually in a vacuum. just because they come in a vacuum doesnt mean they are in one when you buy them alot of times a valve gets hit and opens slightly. did you see him test that it was in a vacuum? If it was actually in a vacuum you should be fine but if he never tested it tought to say.
If you use the propane liquid, and there is any moisture /water vapor inside the tank, it will freeze instantly and not facilitate you getting out the water/moisture which is the aim of purging. So using the propane liquid will lead to failure to achieve the results of purging... no oxygen in the tank.
You are correct. Tanks we receive under a vacuum are deemed to not have any air or moisture this is one of the reasons we purge with vapor through the service valve in this video I was purging with vapor not liquid. Thanks!
Not a terrible video... but when basic things in a process aren't explained in detail it's not good. Seems like a great guy...but he assumes to much in his viewers. Please make another video that is more informative on purging a tank.
Even though propane vapor now a days is considered “dry gas” it’s still got some moisture in it. We put the methanol in to keep that moisture in suspension and eventually work it’s way through a burner and out of the system. Lack of methanol is a big reason some people deal with regulator freeze ups
Good examples and instructions.
I have a question a 20 or 30 pounds or 40 pounds RV tank portable you’re supposed to unscrew the little screw on the side to purge as you feel to have the air escape because Air under pressure creates acid and also conversation a few places I went to said that they don’t do that anymore. That’ll get the water or the air out.
most people have 20 gal tanks...suprised you didn't provide an example of purging with it.
How to get the condensation out?? Too much water, 7 gal rv tank stops burnig at stove but can only put 3.6 gals in. Please help.
sounds like the tank is being put into auto refrigeration. depending on the conditions if the usage is greater than the amount that the tank is boiling it will stop boiling and it will act like an empty tank but still be half full
Thanks for making this informative video. How much vacuum is needed?
I can’t find a number in my code books that it is called for we just shoot for a level close to what we pull down refrigerant systems to which I believe is lower than what is required for propane. Not advice just what we do
Hey man, what is the gel that gets produced by the tank? You know, the stuff that plugs up pig tails and regulators
propane is a petroleum product so naturally there are oils that are in suspension in the liquid and vapor. These are called heavy ends
hello,,,,,,,,can you explain how to fix a leaking relief valve on an old (30 years ) 500 gallon underground tank thanks joe
The tank has to be emptied then flared off and then the relief valve can be removed and replaced
Ok, so you fed the 100 gal tank with 1 pint of methanol. Then pulled propane into the tank from the other 100 gal tank until it was even pressure? So, my question is. On a 100 lb tank with a standard POL valve how would you actually purge the tank? Add about a gallon of propane and then open the valve about 5 times to push the air out? Then fill to 20 gallons? I have 2 new 100 lb tanks that both appear to be under vacuum. Should I open the valve until vacuum is gone then fill tank and perform the purge with one gallon?
With a 100 pound tank that has air in it the procedure is to pressurize the tank to 15 psi with propane vapor and then released. Rinse and repeat this procedure 5 times with propane vapor and they deem the amount of potential air in the system to be minuscule enough to not be an issue and will eventually work its way through the system
If the tanks are under a vacuum we normally put half a pint of methanol in for a 100 pounder. If you don’t have a system to inject propane vapor in but you inject liquid in I wouldn’t worry about releasing vapor. If the tank is under a vacuum it means there is an absence of air which is ultimately you’re looking for so once the liquid propane vaporizes and fills the tank you should be ok
@@benno390 awesome thanks for the help!
@@benno390 Can you also draw a vacuum? This would also remove any water as we do with AC systems
@@cyoungso if the tank just has air in it yes I wouldn’t attempt it with propane vapor present in the tank. Most new tanks come to us under a vacuum but it is still standard procedure to add methanol and to bring up to positive pressure with vapor through the service valve
I just just purchased two 100 pound tanks and the guy didn’t tell me they had to be purred. They were vacuum purge and he just built them up without saying anything. What should I do?
tough to say without being there hopefully they were actually in a vacuum. just because they come in a vacuum doesnt mean they are in one when you buy them alot of times a valve gets hit and opens slightly. did you see him test that it was in a vacuum? If it was actually in a vacuum you should be fine but if he never tested it tought to say.
If you use the propane liquid, and there is any moisture /water vapor inside the tank, it will freeze instantly and not facilitate you getting out the water/moisture which is the aim of purging. So using the propane liquid will lead to failure to achieve the results of purging... no oxygen in the tank.
You are correct. Tanks we receive under a vacuum are deemed to not have any air or moisture this is one of the reasons we purge with vapor through the service valve in this video I was purging with vapor not liquid. Thanks!
Thanks.
Not a terrible video... but when basic things in a process aren't explained in detail it's not good. Seems like a great guy...but he assumes to much in his viewers. Please make another video that is more informative on purging a tank.
Thanks!
What’s the purpose of the methanol?
Even though propane vapor now a days is considered “dry gas” it’s still got some moisture in it. We put the methanol in to keep that moisture in suspension and eventually work it’s way through a burner and out of the system. Lack of methanol is a big reason some people deal with regulator freeze ups