Thermo Scientific VF-F20-A Operating Manual page 184

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7 Maintenance and Service
Page 184
Figure 89: Exploded view of the fraction collection valve
No. Description
1 Stator screws
2 Fraction collection valve stator
3 Grooves on fraction collection
valve rotor
3. Remove the fraction collection valve stator (2). To ensure that the
sealing surface of the stator is not damaged, rest it on its outer face.
4. With your fingers or a small tool, gently pry the rotor (4) away from
the body.
5. Examine the rotor sealing surface for scratches. If you see any, the
rotor should be replaced.
6. Examine the stator sealing surfaces. If scratches are visible between
the ports, that stator should be replaced.
7. Clean all the parts thoroughly with an appropriate solvent, taking
care that no surfaces get scratched.
TIP The most common problem in the use of the valve with HPLC is the
formation of buffer crystals, which are usually water-soluble. After
cleaning, it is not necessary to dry the rotor.
To avoid any contamination of the surfaces, clean all parts with
isopropanol and use disposable gloves when reassembling the valve.
Integral Fraction Collector FT (VF-F20-A) Operating Manual
No. Description
4 Fraction collection valve rotor
5 Pins ( two ) on valve body
6 Fraction collection valve body
6
5
4
3
2
1