For M.A.S. burners the important factors for flame shape adjustment is the setting of :
Scale number (long or short flames)
Scale number on flame setting device increase or decrease by actuation of a crank long to short flame
M.A.S. air pressure (sharp or soft flames)
Pressure-flow setting of M.A.S. air increase or decrease by valve setting sharp to soft flame
Pressure of central air
Pressure-flow setting of central air increase or decrease by valve setting combustion quality
The simplicity of the adjustment function provides a high degree of reproducibility even when a lot of different fuels are fired or conditions out of any reason would change.
The operator only has to adjust:
* pressure (flow) of M.A.S. air
* scale number (deflection of M.A.S. nozzles) on the scale of the flame setting device
* pressure (flow) of central air