Fig. 2

Under conditions of case 1, the differential pressure across the Venturi-type flow meter at VB #2 and the CGHe pressures at VB #1 and VB #2 increase when the electric power applied to the heater inside the LHe vessel of S0 is increased, but the LHe pressures at VB #1 and VB #2 decrease. The regulation valves of LHe and CGHe open gradually to compensate for the extra pressure drop caused by increased heater power