Safety valve for a cutter/welder has a control unit with a membrane between the oxygen and combustion gas channels to give the correct mixture and prevent a gas outflow on insufficient oxygen pressure

摘要

The safety valve, for the oxygen and combustion gas supplies to the burner of a cutter/welder, has a control unit (9) between the oxygen channel (7) and the combustion gas channel (8), to open the combustion gas channel (8) according to the actual oxygen pressure. The control (9) has at least one membrane (11) in a connecting chamber (13), or channel between the oxygen channel (7) and the combustion gas channel (8), to act on a combustion gas channel valve (15).