The paper pulp is admitted through pipe 1 at a constant head into suspended vessel 2, which is linked by a hinged joint to two- arm lever 3. Lever 3 turns about fixed axis A and has counter-balancing weigisht 4, which can be adjusted along the lever. Surplus pulp is discharged through overflow pipe b. From vessel 2, the pulp passes through nozzle 5. Since the rate of flow through the nozzle depends upon the degree of thickness of the pulp, variations in the consistency of the pulp change its level in vessel 2. Nozzle 5 fits into V-shaped pipe 6 with two branches, a and d. Depending upon its consistency, the pulp passes through branche a or d, or simultaneously through both. When the pulp is of the required consistency, it passes through both simultaneously. Weight 4 is adjusted along lever 3 to correspond to this consistency. By changing the position of weight 4, the degree of consistency of the pulp can be varied, setting the pipe branches in the central position. At increased consistency, the pulp passes mainly through branch a and, dropping on the vanes of rotor 7, turns it counterclockwise. The rotor operates a water regulating valve (not shown), increasing the amount of water supplied to the pulp. The setting of vessel 2 with respect to the rotor can be adjusted by means of counterweight 8. Upon reduced consistency, the pulp passes through branch d and turns rotor 7 clockwise. This reduces the water supply and raises the consistency of the pulp.
$4253$CHP,Rg$