fig2 a fig2 c shows another alternative embodiment of a two phase distribution header 41 wherein the inlet 42 located at a side of the shell enclosure 43 and is aimed towards a baffle plate 48 arranged therein the baffle plate 48 is positioned as a shield and prevents direct entry of the liquid gas mixture from the entry inlet 42 into the outlet elements 47 the liquid fraction 44 is collected on the bottom surface 45 whereas the gaseous phase assembles in the collector space 46 above the bottom surface 45 the bottom surface 45 is provided with multiple outlet elements 47 similar to fig2 a and fig2 b fig3 a 3 d show examples of multi phase outlet elements according to the invention fig3 a shows a tubular outlet element 50 arranged in a bottom surface 51 the outlet element 50 comprises an essentially v shaped split aperture 52 which allows the liquid fraction 53 to enter the tube 54 as a film along the tube wall 54 whereas the gaseous fraction enters the tube 54 from the top and is transported through the centre 55 of the tube the v shape allows self regulation of the level of the liquid 53 ensuring that the accessible entry aperture into the tube becomes larger when the liquid level 53.