What should I check on the gas bottle?
There all kinds of commercial CO2 gas cylinders. It is advisable to take the short version (small “compact” bottle with handle) with a fill weight of 20-22lbs (10KG) in shape. This can be economically refilled or exchanged for full bottles and are still easy to carry from the weight.
Here are two options of these bottle sizes to choose from:
Gas cylinders without a dip tube (syphon tube) valve must be upside down during filling or be turned so that the liquid CO2 can flow into the cylinder.
Gas cylinders with a dip tube (syphon tube) valve (Also called immersion tube) however, do not have to be rotated during filling and are therefore more comfortable.
Both options have the same result.
10KG (22 lbs) CO2 Gas Cylinder
Dip tube Valve design
10KG (22 lbs) CO2 Gas Cylinder
Without Dip tube valve
Which gas cylinders fits the adapter?
Carbon dioxide (CO2) gas cylinders all have a standardized right-hand gas thread and match the CO2 adapter.
(intake: W21,8×1/14“ RH Female/ For example: DIN 477 No. 6)
These connectors are compatible with Refill Adapter Pro 2 plus EU-Version.
- German Standard DIN 477 No.6
- Swiss Standard SN 219505 No.7
- British Standard BS 341 No.8
- French Standard NF type C
- Spanish Standard ITC EP-6, Tipo C
- Netherland Standard NEN 3268, RU 1
- Italy Standard UNI 4406
- Australian Standard Type 30
Gas cylinder connections per European standard
Due to the standardized connection with carbon dioxide gas bottles, you can use the adapter in Europe.
The standard connection is also equivalent to the conventional CO2 gas cylinder connections in many other countries. Ask your local gas Distributor.
Gas Cylinder Valve
The carbon dioxide gas cylinders, there are two different types of valves functioning.
Valves “without a return valve” can be used for filling both gaseous and liquid CO2.
For removal of liquid CO2, valves “with a return valve” must additionally be opened manually.
The residual pressure valves are also referred to as “RPV-valves” (Residual Pressure Valve).
RPV valves are used to prevent the penetration of dirt into the cylinder. (Therefore, cylinders without RPV valves does not empty completely and leaves no residual pressure.)
The filling result is identical for two valves.
Gas cylinder valves without RPV (examples)
The valve opening without RPV is free till the back the valve pin.
Gas cylinder valves with shut-off (examples)
For valves with RPV an additional valve is inserted in the through hole.
Our adapter “plus version Pro 2” can be used with both valve types, so you have, in terms of the cylinder valve, flexibility when buying / Swapping your large gas cylinder.
Recommended filling conditions for carbon dioxide cylinder
- Carbon dioxide cylinders with recommended valve
- 20-22lbs (10 KG) CO2 gas bottle without dip tube, short version with carrying handle (see Fig. Above / right)
The advantage of “normal” gas cylinders without syphon tube is an optimum price / performance ratio in terms of carbon dioxide fills. In addition, the cylinders are widely available.
(CO2 Tank with dip tube/ syphon tube, do not have to be rotated, making them more comfortable. However, this type is not common, thus somewhat more expensive to buy and the fillings are mainly done by gas distributors.)
One way to turn the twisted bottle, prepare a stable board with a hole in the center, with the handle of the gas cylinder still resting well. The valve can be turned up and down from below through the hole.
The board should, on both sides, have a secure support surface and be sturdy enough.