why pneumatic control signal output is use 0.2 to 1 kg/cm2

Answer Posted / rana mujahid

starting from .2 is for live zero and .2 to 1 kg/cm2 is
because in this range the relation b/w flapper and nozzal
movment is linear,it was observed in starting of pneumatic
instrument after this it became standard....and still now
contineu

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