In the reducing valve, heat is extracted from the carbon dioxide by expanding the carbon dioxide. This can cause ice to form on the pressure reducing valve. This ice formation usually occurs on the outside of the valve and usually has no influence on the operation of the reducing valve. Only in the case of very severe frost does the effectiveness of the reducing valve become less effective. To prevent the reducing valve from freezing, a heating device is placed between the cylinder and the reducing valve. This heating device operates on 230 volts and consumes 250 watts. The cord has a length of 1.5 meters. The inlet of the heater is 21.8 r internally. The output has a 21.8 r male thread with a flat seal (RU1).