General instructions for filling
Differences with the filling the two selectable valve types with large gas cylinders.
Differences when filling the pre-cooled / not pre-cooled cylinder cartridge.
Difference when filling (gas bottles with dip tube / without dip tube)
Filling with dip tube / (syphon tube) bottle
The empty weight of CO2 cylinder to be filled should be checked before the first filling with e.g. kitchen scales. After each filling the total weight should be checked to ensure that the CO2 cartridge is not more than the max. specified capacity -e.g., 425gr.
- The CO2 adapter is screwed onto the gas connection of the large carbon dioxide bottle.
- The empty CO2 cylinder is now screwed onto the other side of the adapter. The valve of the gas cylinder can now be turned so that the liquid CO2 can flow into the cylinder. After about 20-30 sec., pressure can be felt on the valve of the gas cylinder.
- By venting the residual pressure from the adapter, the valve of the cylinder closes simultaneously, so that the connection is depressurized again.
- Unscrew the filled cartridge from the adapter and check the filled CO2 amount as described above.
Filling without dip tube
The filling of a gas bottle without syphon tube is identical. Here, since only gaseous CO2 would overflow, the gas cylinder must be rotated 180 degrees during the filling so that the liquid CO2 can flow towards the valve and thus into the cylinder.
The twisted bottle should be connected on to a device, so it can not overturn.
Two different filling options for CO2 cylinder
Option 1)
Fill the cylinder without pre-cooling. For physical reasons, this way, you get no more than 300gr in the cartridge and therefore remain under the potential capacity of the cylinder – 425gr, which is indicated on the cylinder.
Option 2)
Place the empty cylinder for 1-2 hr, or overnight in the freezer. When you perform the filling process with the chilled bottle, then you can get the cylinder completely full.
Information for the Filling protection valve
Find out how you can fill your cylinder with the valve on the right.
Filling the newer CO2 cylinder with Fillng protection valve (6 mm wide valve pin)
Unlike the other cylinder valves, this valve must be filled with a slow increase in pressure.
When refilling, it is important that the pressure in the first few seconds is very low, only the cylinder valve remains open. The handwheel is therefore open at the beginning only slightly and very slowly until some gas flows through (this can heard). Wait about 10 seconds and then turn the hand wheel slowly by hand half a turn further on. After another 10 seconds, the hand wheel can be turned all the way. Wait about 30 seconds until you hear no gas flows and turn the handwheel to back. After, filling is complete.
Since the handwheels opens the handwheel slightly, it is advantageous, for example, on the first attempt. Carefully turn with a small pipe wrench piece. Due to the larger lever, the flow can be controlled . After a few attempts it will come off by hand -without aid. If there is gas flow during the untwisting at the beginning… stop!! You must repeat the filling operation. The adapter must be vented in advance.
The cylinder should be empty. Pre Cooled cartridges will get quite full.
The disadvantage is the repetitive effort in adjusting the pressure increase as opposed to the other cylinder valves which can be filled by simpley crackin the handwheel. If you want to bypass this effort, it is recommended to use a cartridge with one of the other valves. (In our shop you can have a suitable valve for this cylinder with order)
(Background for filling: This valve has a second valve stage, if a pin lying behind pushes back too much pressure through the valve, it closes from the inside. A manual operation of the valve pin during the filling process does not bypass this function. This cylinder valve is possible only with slowly increasing pressure.)
Filling the Filling protection valve - (alternative way)
Filling with gas cylinders without a dip tube valve
The large gas cylinder remains normal at the beginning, and is not rotated. Unscrew the empty cylinder from the adapter and turn the handwheel all the way slowly by hand. Now turn the big bottle with valve still open, “upside down” and wait about 60 seconds. Then close the valve and place the bottle back to “normal” at the bottom of the bottle. Once you have vented the adapter, you can unscrew the filled cylinder.
With this option, the capacity is about 50-70 gr less, so a cooled cylinder is an advantage.
Filling with gas cylinders in a dip tube design
The refilling is analogous, but the large gas cylinder is placed on its head at the beginning