8. Ultrafiltration
8.3.5 Flow Equalizer
The flow equalizer is made of two nearly identical chambers.
Each chamber is comprised of two compartments (one predialyzer
and one postdialyzer), separated by a diaphragm and four solenoid-
actuated valves. These valves control the timing of the filling and
emptying of the compartments. The supply pump pressurizes the
input to the dialyzer cavity forcing it to fill. By balancing the flow
of dialysate to and from the dialyzer, with two flow equalizer
compartments, the dialysate flow to the dialyzer can be accurately
controlled over a wide range of flow rates.
Figure 8-7. Flow Equalizer
The following is a series of graphics and brief descriptions of the
three phases of the UF Controller's action on the Flow Equalizer.
In each figure, take particular note of the Flow Equalizer’s C1, C2,
C3, and C4 compartments.
157-1278-915 Rev A 8-11
January 2004
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