Multipurpose seal for inlet and outlet pipes, with two inner edges

摘要

The inflow pipe seal (22) has a first inner edge (26) and several inlets. The outflow pipe seal (50) has a second, inner edge (54) and several outlets. The inflow pipe seal is fixed to the outflow pipe seal at several points so that a gap with constant width is formed between the inflow and outflow pipes seals along the first and second inner edges., to restrict heat transmission from the outflow to the inflow pipe seals.