cytiva AKTA readyflux Operating Instructions Manual page 41

Pinch valves
Pinch valves are used to control the path of the liquid flow through the flowpath. There
are 20 pinch valves and one PCV. The valves have manually operated safety locks
keeping the tubing in place and preventing the valves from accidentally closing during
flow kit installation.
During pause, the valves will remain in the same position as during the run. At the end
of a method run, or at emergency stop, the valves reset to their default positions.
During no run, changing between FLOW KIT INSTALL or INTEGRITY TEST will change
the valves to different open/close states.
The illustration below shows a pinch valve.
Default positions of valves
The table below lists the different valves and their default positions when using CFF
flow kits.
Valves
Permeate valves, XV-031 to XV-034
Air inlet valve, XV-081
Transfer valves, XV-082 to XV-085
Transfer to retentate valve, XV-086
Retentate valves, XV-051 and XV-052
Pressure control valve, PCV-341
Integrity valve, XV-041
Additional feed inlet valves, XV-001 to XV-003
ÄKTA readyflux Operating Instructions 29175550 AG
WARNING
Never put fingers or any objects other than the intended tubing
into the pinch valve opening.
3 System description
3.3 Components
3.3.2 Pumps and valves
Default position
Closed
Closed
Closed
Closed
Open
Open
Closed
Closed
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