A method for the separation of hydrocarbon compounds utilizing a dividing wall distillation column is described. The interface requests information and displays information. The printing consumable has a second integrated circuit which generates validation information using the random number and the secret key received from the first integrated circuit. A breathing apparatus holder is provided for securing an air bottle to the support member of the respective firefighter station. With this arrangement, the magnet layer is non-tacky when removed from the pressure sensitive carrier layer, the original product label is visible upon removal of the clean release magnet and the product contents remain free from contamination from the clean release magnet. The control unit includes a control valve with inner and outer sleeves, and an adjustment direction and the pump or torque mode is adjustable by the control valve by the relative rotational position of the inner sleeve to the outer sleeve.