Approximately how much liquid propane would one have to have in a 500 gallon tank to have enough volume/pressure to fill a tank on the tractor? How about a 250 gallon tank, would it have enough volume to fill a tractor tank without needing a pump. How low could it get before pressure equalizes and transfer of liquid stops? Don't see many 250 gallon tanks around, but have seen some decent prices on 500 gallon tanks.
- Thread starter Rich Iowa
- Start date
danofarming
Member
Amount of Liquid in the storage tank does not matter. You open the vapor or bleeder valve on the tank to be filled and the pressure will drop. This difference in pressure between the storage tank and tractor tank causes the liquid to flow.
The size tank and amount in it have little to nothing to do with filling a tractor from it. The key to it is the tank MUST be equiped with a "wet valve",a fitting next to those used by supplier to fill home tank and another which feeds the house. The fill hose connects "wet valve" to tractor tank. Wet valve is opened and a bleeder on tractor tank is opened to allow gas to escape keeping pressure down in tank as LIQUID flows through fill hose. When tank reaches 80% the bleeder starts squirting liquid. If you live where tempatures drop far below 20s,it's a slow process unless you put the wife's electric blanket on big tank. Several have had trouble getting suppliers to suppy and fill tanks with wet valves but that's another discussion.
Thanks for the help guys. I know the requirement for the wet line and the filling process. Just wasn't sure how large of a tank was needed to refill a low or empty tank on the tractor. So, a 40 gallon tank could fill a 30 gallon tank no problem, by just bleeding off the pressure from the smaller tank?
Dan in North Houston
Member
Rich, I have a JD 630 LP, but I have only had it a few years and have probably only refueled it a half dozen times from the wet line on my 500 gal LP tank.
I have noticed that the absolute temperature outside and the relative temperature of the big tank and the tractor tank has a lot to do with the fueling process. I know that the vapor pressure of LP gas, which is dependant on the temperature, has a pretty big range over normal outside temps. For example, if it is near freezing outside, the vapor pressure in the tank to drive the liquid to the tractor is going to be low and it's not going to work very well. I try to fuel the tractor when the main tank has been warmed by the sun in the morning, but the tractor tank is still cool from sitting in the shade in the equipment shed. If I try to fuel it late in the day when both tanks have been outside in the Texas heat all day, it takes a lot longer.
Someone here on YT told me that it takes forever plus 5 minutes to fill the tank.
I have noticed that the absolute temperature outside and the relative temperature of the big tank and the tractor tank has a lot to do with the fueling process. I know that the vapor pressure of LP gas, which is dependant on the temperature, has a pretty big range over normal outside temps. For example, if it is near freezing outside, the vapor pressure in the tank to drive the liquid to the tractor is going to be low and it's not going to work very well. I try to fuel the tractor when the main tank has been warmed by the sun in the morning, but the tractor tank is still cool from sitting in the shade in the equipment shed. If I try to fuel it late in the day when both tanks have been outside in the Texas heat all day, it takes a lot longer.
Someone here on YT told me that it takes forever plus 5 minutes to fill the tank.
This tank has both the liquid and vapor service lines, not sure the liquid side will work. I plan to take it a town south of here to have the head guy of the coop's propane department take a look and see if my plan is possible. If not, I think I can sell the tank... was the main fuel tank off of a propane Allis Chalmers 180/190/200 series. Last night I was looking on craigslist and found a 500gal tank mounted on a shortened running gear, might be the best way to go.
All tractor tanks have liquid valves,regardles of capicity. On the other hand some home storage tanks don't. Truth is if you own the tank you can draw liquid with presidential rigging. Most people that know how are not about to give instructions on a forum like this but will help in person if they know they will not be sued over it.
J.Wondergem
Well-known Member
- Location
- Rockford, Mi.
LOL. Now that's a funny way of putting your rigging. Never heard that one before. :lol:
rustyfarmall
Well-known Member
I know how to do the presidential rigging. I just do not know where to get the parts.
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