Is the suction head necessary when the incoming condensate is under overpressure?
In standard systems the collecting tank or the consumer is connected with the VOIGT-Lifter by its relaxation line. Thus pressure balance exists, which means that the inlet positive pressure is waived. In cases of little suction heads, it is recommended to lead the relaxation line into a system of lower pressure or, if possible, to lead it into the deaerator. This pressure gradient replaces the suction head, the differential pressure should be between 0,15 and 0,25 bar or higher, depending upon the type of lifter.
