Thermo Scientific SOLA II, User Manual

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Rotary Valve Service
Cleaning the Rotor
B-4 SOLA II User Guide Thermo Fisher Scientific
1. Carefully grasp the rotor on either end and briefly immerse it in solvent.
If it is difficult to grip the rotor securely, hemostats or needle-nosed pliers
may be helpful. Grip the tab end, being careful not to mar the metal or
touch the polymer.
2. Gently wipe the polymer with a clean tissue.
3. Blow with clean compressed gas to remove any lint left by the tissue.
4. Visually inspect the rotor. If it shows any scratches and/or a narrowing of
the flow passages, replacement is necessary.
1. Place the clean rotor on the pencil magnet and orient it so that the tab
properly engages the slot of the drive mechanism. The list in Figure
B–3 shows how to orient the ID letter for different VICI valves (A C6W is
shown in Figure B–4).
2. Insert the rotor into the valve body, being careful that the tab does not
touch the polished interior of the valve body. Make sure the rotor tab
(Figure B–4) is fully inserted into the slot in the driver.
3. Using a pencil or other small pointed object, hold the rotor in place in the
valve body while pulling the magnet free.
4. Replace the knurled preload assembly, tightening it into the valve body by
hand just beyond the point where it touches the rotor. Cycle the valve 10
times to seat the sealing surfaces, leaving the valve fully in its clockwise or
counterclockwise position.
5. Tighten the preload in quarter-turn increments, cycling the valve 10 times
after each step. The preload must end up fully bottomed-out, but
attempts to tighten further do not affect the sealing forces.
Note
Make certain that the valve is never left partially actuated. It should
always be in either its fully clockwise or fully counterclockwise position.
σ
Cleaning the
Rotor
Rotor Assembly