Arena Service Manual
Figure 8-6. Input Pressure Equalizer
The input pressure equalizer is a chamber divided by a flexible
diaphragm into two compartments. There is an actuator in the
diaphragm on the "post" (spent dialysate) side of the pressure
equalizer, which opens or closes a port to the dialysate pressure
pump.
The supply pressure regulator pushes the diaphragm on the "pre"
(fresh dialysate) side of pressure regulator. When the actuator
closes the port on the "post" side of the pressure equalizer, the
pressure rises on that side of the pressure equalizer until the spent
dialysate pressure matches the supply pressure regulator pressure.
By forcing the pressure of the spent dialysate entering the flow
equalizer to equal the supply regulator pressure, the flow equalizer
fills at an even rate.
8-10 157-1278-915 Rev A
January 2004
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