Answer / mazhar ali

IT IS BASICALLY TERMED AS 3 ELEMENT CONTROL.
THIS IS USED IN BOILER HOUSE WHERE IN DRUM LEVEL IS CONTROL.
SO IT INVOLVES FEED WATER CONTROL , STREAM FLOW CONTROL AND
DRUM LEVEL CONTROL SIMULTANEOUSLY.

Answer / sridhar

3 Element means,in that application is mostly used at
Boiler feed water control for maintaing the drum level in
steam drum,it consists 3 mesure devices,one is feed flow
trx,second is steam flow trx,and third one is drum level
(compensated)trx

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