pulp that has been consolidated into large pieces to a shredder screw 8 the shredding axis of which is arranged to be essentially parallel to the axes of rotation of the drums a small oblique mounting of a maximum of 5 10 degree may for example be present if a conical shredder screw is used where the mat is fed to an inlet slit in the outer casing of a conical shredder screw where the inlet slit lies parallel with the axes of the drums the fragmented pulp is led after this shredder screw 8 out from an outlet in the casing of the shredder screw in the flow 21 to a dilution screw 30 that is driven by a motor 31 the dilution screw exposes the pulp to continuous tumbling during the addition of dilution fluid liq2 and the pulp is subsequently fed to a stand pipe 40 at its finally conditioned consistency the pulp can subsequently be pumped from the stand pipe 40 to the next treatment step of similar type in the bleaching line fig2 shows another view of a part of the same process in which the shredder screw 8 is oriented in the same direction as the dilution screw 30 it can be seen more clearly here how the.