Thermo Scientific VF-F20-A Operating Manual page 185

Integral Fraction Collector FT (VF-F20-A) Operating Manual
8. Reinstall the cleaned rotor or replace with a new rotor, making sure
that the rotor sealing surface with its engraved grooves is facing out.
The tabs on the rotor have an asymmetrical pattern to prevent
assembly with improper orientation.
9. Reinstall the cleaned stator or mount the replacement stator onto
the valve, by aligning the matching holes in the stator with the two
pins on the valve body.
10. Insert the five stator screws and tighten them gently until they start
to get snug. Alternate among the five screws in the sequence as
indicated in below figure, tightening them in quarter-turn( 90° )
increments until the stator is flush against the valve body.
Figure 90: Loosening and tightening order
11. Reinstall all liquid lines as reversed steps.
NOTICE The valve sealing surfaces must be protected during any
disassembly or cleaning procedure. Work in a clean environment and
always set parts on a soft tissue or clean paper. Cleaning a valve can
often be accomplished by flushing all the lines with appropriate solvents.
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7 Maintenance and Service
Page 185