YMC Europe GmbH
Cleaning and maintenance
YMC Pilot
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Low pressure chromatography column
7.4.3
Replacing the glass body
ATTENTION
Faulty assembly
Damage to the glass body possible due to faulty assembly.
► Take care during the assembly of the glass body that the maximum torque is not
exceeded: 2.2 Nm for columns with 100 mm ID, 4.2 Nm for columns with 140 and
200 mm ID and 7.0 Nm for columns with 300 mm ID.
► Assemble the cylinder screws in a diagonal pattern and always tighten on the
opposite sites.
► Take care during assembly of the glass body that all parts are correctly aligned.
Devices required:
• Cylinder screw key, torque wrench
The glass body is dismantled as follows:
1. Remove the adjustable end piece Chapter 6.3.1, p. 27.
2. Loosen the cap nuts stepwise half turn. Do it diagonally: Loosen cap nuts
always on opposite sites.
3. Remove the cap nuts and washers.
4. Remove the column disc from the column body. Remove the O-ring glass
body.
5. Remove the glass body carefully.
6. Position the new glass body on the O-ring glass body.
7. Check that the glass body is concentric with the O-rings.
8. Put the O-ring glass body on the top edge of the glass body.
9. Align the column disc with the rods and put it on the glass body. The threaded
rods are guided through the holes in the column disc.
10. Check that the O-ring is in the notch of the column disc.
11. Check that the glass body is concentric with the column disc.
12. Adjust the counter nuts and washers below the column disc to a distance of
approx. 5 mm below the column disc.
13. Put the washers over the threaded rods on top of the column disc.
14. Tighten the cap nuts stepwise. Do it diagonally: Tighten cap nuts always on
opposite sites. Tighten them until you reach the required torque.
15. Tighten the cap nuts and the corresponding counter nuts with a cylinder screw
key. Do it on opposite sites.
