Vacuum Systems With Surface Condensers

The system shown in the sketch achieves a suction pressure of 1 mbar. The temperature of the available cooling water determines the pressure which can be reached in the first surface condenser. In this example, two ejector stages have been series-connected to achieve a suction pressure of 1 mbar with the lowest possible use of motive flow. Two further ejector stages compress the non-condensable components of the suction flow from the first condenser up to atmospheric pressure. The interconnected surface condenser condenses the motive steam of the preceding ejector.