2 . T e c h n i c a l System Description
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BA-TE-DE08C M.KAY
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B. Braun Avitum AG
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SW 9.xx
2.20
Description Flow Diagram
The flow diagram can be divided into six sections:
•
Water Inlet Section with Water Block
•
Degassing Circuit with Temperature System
•
Dialysate Processing
•
Balance Chamber
•
Ultrafiltration
•
Rinsing Bridge
2.20.1
Water Inlet Section with Water
Block
The water inlet section has the following components
•
Pressure Reducer Valve DMV
DMV
DMV
DMV
•
Upline Tank Inlet Valve V
V
V
V VBE
VBE
VBE
VBE (2/2 way valve)
•
Water Block WAB
WAB
WAB
WAB with integrated Upline Tank VB, Level Sensors Water Block
NSVB
NSVB
NSVB
NSVB, Heat Exchanger WT
WT
WT
WT, 2 double-stage Heater H
H
H
H, Degassing Chamber EK
EK
EK
EK
EK
Water Inlet
Dialysate Outlet
DMV
VVBE
TSE
PE
TSHE
VVB*
VBKO*
DBK*
T
A
D
T
RVBO*
VBKS
TSBIC
VBICP*
SKBS
RVDA
VLA
H
NS
V
B
VB WT
FEP
WAB
EP
VEB
TSH
T
8
Fig. : Water Inlet with Water Block
Pressure Reducer Valve DMV
Pressure Reducer Valve DMV
Pressure Reducer Valve DMV
Pressure Reducer Valve DMV
The pressure reducer valve DMV limits the pressure of the
inlet water (e.g. osmosis water) to 0.9
±
0.1 bar.
Upline Tank Inlet Valve
Upline Tank Inlet Valve
Upline Tank Inlet Valve
Upline Tank Inlet Valve V
V
V
V VBE
VBE
VBE
VBE
The valve VVBE is time-delayed controlled via the level sensor
NSVB
NSVB
NSVB
NSVB (top) in the upline tank VB
VB
VB
VB. The delay time depends on
the dialysate flow.
Level Sensors Upline Tank NSVB
Level Sensors Upline Tank NSVB
Level Sensors Upline Tank NSVB
Level Sensors Upline Tank NSVB
The level sensors are mounted in the upline tank VB.
NSVB
NSVB
NSVB
NSVB top:
closed
- VVBE is closed
NSVB
NSVB
NSVB
NSVB bottom (monitoring low water level):
closed (alarm)
- Water inlet is disturbed
- Heater is switched off
– Pumps are stopped
Heat Exchanger WT
Heat Exchanger WT
Heat Exchanger WT
Heat Exchanger WT
The cold inlet water is warmed up via the heat exchanger WT.
Thereby the heat consumption to heat up the water is
reduced.