A practical study of a fluid system including Benfield solution (B.S.) in a group of
containers is presented. The operating function of the coupling valves and level transmitters
inside the containers are obtained. The present work measures the practical values of the
quantity and level of B.S where different techniques of optimization are utilized to minimize
the error performance nsing proportional integral control parameters (PI) to maintain the
level of B.S constant inside the container. The experimental studies and the theoretical
analysis are carried with proper results