Vacuum valve

A vacuum valve comprising:

• a valve housing having a continuous line;
• a movably supported valve body in said valve housing having a movement path relative to said valve housing, the position of said movably supported valve body along said movement path defining a respective conductance through said line;
• a displaceable setting device operationally acting upon said movably supported valve body, thereby setting said position and having a displacement path;
• snap-in devices along said displacement path for snap-in positioning said setting device at predetermined positions along said displacement path;
• said snap-in devices being releasable again by an increase of a displacement force acting upon said setting device;
• said movement path having two ends;
• and wherein at least one of the subsequent is valid:
• the extent of said movement path from one of said ends to a first next subsequent position as set by said setting device at a first predetermined position is different from an extent of said movement path from said first next subsequent position to a further next subsequent position as set by said setting device at a second predetermined position;
• and
• the extent of said movement path from a first position as set by said setting device at a first predetermined position to a second position as set by said setting device at a second and next subsequent predetermined position is different from the extent from said second position to a third position as set by said setting device at a third next subsequent predetermined position.