Modulatable Safety Valve

A safety valve for controlling a gas flow comprising:

• a double safety valve with a magnetic armature that moves by a voltage applied to a coil;
• a first valve with a first valve body, a first valve spring, and a first valve seat;
• a second valve with a second valve body, a second valve spring and a second valve seat;
• a movement of the armature acts from a closed position of the safety valve at first against a spring force of the first valve spring and loosens the first valve body from the first valve seat;
• the movement of the armature subsequently acts against a spring force of the second valve spring and loosens the second valve body from the second valve seat and therefore frees a valve opening for flowthrough of the gas;
• a spring constant of the second valve spring is greater than a spring constant of the first valve spring, and a flowthrough amount of the gas flow through the valve opening can be continuously controlled as a function of the voltage applied to the coil between a closed position and a fully open position, even in partially open positions;
• and
• the first valve spring has a spring constant designed in such a manner that the movement of the armature takes place after a first critical voltage value and moves the first valve body suddenly and fully from the first valve seat into a fully open position.