Replace A Pump Seal - Gilson PLC 2050 User Manual

Replace a Pump Seal

NOTICE
When disassembling or reassembling the pump, make sure that each component is clean and
take care that the system is assembled in a clean environment.
there are four seals: one for each pump head, and one for each cleaning disc.
to disassemble a pump head with cleaning disc, and to replace a seal, follow the instructions
below:
Remove the Pump Head and the Cleaning Disc
1. Purge the system with a suitable solvent.
2. Switch off the system and disconnect it from the mains. (refer to
page 33).
3. Disconnect the etfe inlet tubing by hand (PeeK nut).
4. Disconnect the SS outlet tubing with a 3/8" spanner (SS nut). When loosening the SS nut,
use a 17 mm spanner to hold the check valve housing. you have to remove the tubing (i.e.,
disconnect it from the purge valve holder).
62
maintenanCe
the life of the seals is dependent on the flow rate, pressure, type of liquids used and
temperature used in the machine, but mostly on the cleanliness of the mobile phase and
sample. the presence of micro-particles will cause accelerated wear and tear of the seals.
Similarly, any dried buffer particles on the piston will damage the seal.
etfe inlet tubing with PeeK nuts
(Below Check Valve Housings)
Figure 56
removing the outlet and inlet tubing
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PLC 2050/2250/2500 PurifiCation SyStemS
external Connections
SS outlet
tubing
Check Valve
Housings
on