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.)