The back of the panel is open ; all wiring terminates at the base and all piping terminates in bulkheads at the top. Fig. ... 2 boiler the superheater steam temperature control is regulated by means of tilting burners. ... A diagrammatic arrangement of the control scheme for the No. ... Steam flow from the boiler to the turbine is measured by means of a nozzle in the steam main and a mercury U- tube instrumentanbsp;...