Thermo Scientific LabTower AFT 20 Operating Instructions Manual page 14

P1 Booster pump:
P2 Booster pump:
PS200 Pressure switch:
QIA300 Pure water con-
ductivity measuring
cell:
QIA301 Pure water con-
ductivity measuring
cell:
TIA500 Temperature sensor:
UV1 UV-Disinfection:
UV2 UV-Disinfection:
(option)
V1 3 way ball valve:
V2 Feedwater solenoid valve:
V3 Pressure hold valve:
V4 Rinsing solenoid valve:
V5 Residual water drainage:
V6 Sterile overflow:
(option)
V7 Check valve:
V8 Pressure reducer:
V9 Dispensing valve:
V10 Check valve
14
Thermo Scientific Barnstead LabTower AFT
Increases the input pressure to the required operating pres-
sure.
On withdrawal, pumps pure water through dispensing valve
(V9) and sterile filter (F4) to the pure water outlet,
as well as over the filter (F6) to the consumer.
Switches booster pump (P2) on when pure water is with-
drawn from tank (B1), and switches the pump off dispensing
valve (V9) is closed.
Measuring device for the determination of the conductivity
(after RO) as parameter for the pure water quality.
Measuring device for the determination of the conductivity
(after filter cartridge) as parameter for the pure water quality.
Measures the temperature for temperature compensation.
Reduces the germ respectively bacteria content.
Reduces the germ respectively bacteria content.
To switching normal operation to emergency supply.
Is closed during stand-by and standstills. It prevents water
from flowing into the system when it is not in operation.
Serves to adjust the operating pressure and the WCF-rate.
Opens for cleaning of the membrane prior to pure water-
production, after pure water production and at least every 12
hours.
For complete emptying of the storage tank.
Prevents the penetration of bacteria and other microorgan-
isms.
Prevents pure water from flowing back into the tank.
For adjustment of the pure water pressure in the system.
Allows pure water to be withdrawn from the tank.
Prevents permeat from flowing back into the device
Pure water system