vojtas píše: The 60Lo (U57) uses a superheater, were the ones you were asking about using wet steam? That would explain the differences.
P4, P5 - Schmidt system steam superheater. (P5 - narrow tube 23 cubic meter, P4 - wide tube 38,7 cubic meter).
Maximum steam pressure - 14 atm.
Where can I see the detailed parameters of U57.001?