Why is it so important to preserve the minimal demanded suction head?
The free inlet into a VOIGT-lifter is based on the principle of communicating chambers. During the inlet phase a level and pressure balance between the collector and the VOIGT-lifter takes place. The condensate has to overcome thereby resistances in the inlet line (piping and armatures) and in addition a minimum flow rate must be ensured, in order to reach the achievement parameters. Customary valves of different design and quality are used, which has been considered for the calculation of the necessary suction head. The indication of extremely low suction heads which is done by some competitors is an unfitting sales argument. With pressure condensates however the prescribed suction head can be reduced or omitted, if the relaxation line of the VOIGT-Lifter is merged into a line with lower pressure.
