Mellapak is the most widely used structured packing worldwide. MellapakPlus™ is the latest generation of structured packing. With the enhancement of the geometric structure of conventional Mellapak™, the pressure drop is much lower and the maximum capacity can be extended by 50% compared to Mellapak™.
Suitable for a wide range of applications from low to very high liquid loads, from vacuum to moderate pressure for distillation and to high pressure for absorption and desorption systems
Available in a wide range of stainless steel types, alloys, and thermoplastics
Key characteristics
Pressure drop per theoretical stage 0.3 - 1.0 mbar
Pressure drop at 70-80% flooding about 2 mbar/m
Minimum liquid load approximately 0.2 m3/m2h
Maximum liquid load up to more than 200 m3/m2h (typically in desorption columns)
Preferred applications
Vacuum to moderate pressure
High pressure for selected applications
Increasing capacity of existing tray and packed column
The new style of packing incorporates a patented modification to the lower and upper end of each packing element. The corrugation angle in relation to the vertical is gradually reduced to zero at both ends of each sheet (see picture). This design modification of the corrugation angle causes a smooth and steady change of flow direction; it is no longer abrupt as with Mellapak™. The result is a reduction in pressure drop and in the shear force between the gas and liquid phase, and a reduction of gas velocity.
