XV-023
XV-021
XV-024
XV-071
XV-022
Open valve(s)Valve positions
XV-022Bypass
XV-021 + XV-024Inline (Default)
XV-021 + XV-023Fill
XV-021 + XV-023 + XV-024Fill_Inline
XV-021 + XV-024 + XV-071Out_through_drain
XV-023 + XV-024 + XV-071Drain (No flow)
The Drain valve position is used for example when the air trap is emptied before disas-
sembly or to lower the liquid level in the air trap. The pump(s) must be set to 0.0 l/h when
the Drain valve position is used.
The UNICORN instruction ManFlow must be used when running
Out_through_drain unless the system has a flow meter before the air trap.
However, it is possible to use Flow for short periods of time even if the system
is not equipped with a flow meter.
Note:
If the system is set for max flow when Fill is used, the air trap may not be able
to close quickly enough and in that case it will overflow. Reduce the flow to
avoid this.
Note:
The UNICORN instruction Alarms:AirTrapLevelControl can be used to enable or disable
the automatic liquid level control. The other settings outlined in the table below automat-
ically disable the level control.
ÄKTAprocess Operating Instructions 29-0252-49 AA 63
3 System description
3.3 Standard components
3.3.7 Valves
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