Filtering column for filtering heavy fuels under pressure at high temperature

摘要

The filtering column is of the type comprising a perforated hollow metal tubular body (11) around which is disposed a stack (20) of metal rings (27) having deformations forming spacing elements and defining therebetween filtering interstices. The rings (27) have an inside diameter exceeding the outside diameter of the tubular body (11) so as to define between the inner periphery of each ring and the outer periphery of the tubular body a limited radial clearance (26) which does not exceed the elastic limit of each individual ring. The rings (27) constitute a stack (20) retained axially on the hollow body (11) in an undetachable manner with an axial clearance exceeding the aforementioned radial clearance.