chamber 40 extending the length of the shoe the shoe has end plates 31 and 32 which close the ends of the chamber 40 preferably the shoe is made as a casting to the shape illustrated but it may be fabricated or formed of materials other than metal to define the gaps 43 and 44 beneath the edges of the faces 34 and 33 the shoe is spaced from the inner surface 10a of the shell by spacer blocks 47 at each end of the shoe these spacer blocks are of a thickness to define the gap 43 at the leading edge and the gap 44 at the trailing edge the gap preferably is of a dimension 0 04 34 and it has been found that this is an optimum size preferably the gap is less than 0 08 34 and it has been found that increasing the gap beyond that dimension decreases effectiveness and decreasing the gap to less than 0 04 34 does not increase effectiveness for removal of condensate the shoe is held in place by suitable means preferably by bolts 45 fig4 which extend through holes 41 and 42 in the back 30 of the shoe these holes are threaded into threaded receiving holes 46 in the inner surface 10a of the shell the radial conduit 18 is provided with a steam bleed hole 49 on the order of 1 4 34 in size and this steam bleed hole is positioned 2 34 to 3 34 radially inwardly from the inner surface 10a of the shell it has heretofore not been appreciated that a small clearance between the siphon and shell is advantageous in a collector or a shoe which has a large perimeter.