A small amount of paper pulp is delivered by pump 1 into vessel 2 from which it flows out through friction pipe 3. Secured in vessel 2 is membrane 4, which is linked by stem 5 to spool 6 of directional valve 7. Spring 8 with levers 9 and 10 serve to vary the elastic characteristic of the membrane. The electric motor that drives pump 1 also drives gear pump 11, which delivers hydraulic fluid to valve 7. Fluid from the valve is directed to servomotor cylinder 12 with piston 13, whose rod is linked through segment gear 14 and gear 15 to gate valve 16 of the water supply. If the consistency of the pulp increases, its friction in passing through friction pipe 3 also increases and its rate of flow is reduced. This increases the pressure in vessel 2, membrane 4 is bent upward, shifting valve spool 6 upward so that fluid is delivered to the right end of cylinder 12, moving piston 13 to the left. This opens gate valve 16, increasing the amount of water supplied to the pulp. Upon a decrease in consistency, the elements of the regulator operate in the reverse direction. The regulator can be adjusted to a definite pulp consistency by two ways: coarse adjustment by turning the handle of gate valve 16 with respect to gear 15, and fine adjustment by changing the compression of gauged spring 8 by adjusting nut 17.
$4254$CHP,Rg$