Replace The Mixing Chamber Piston - Gilson PLC 2050 User Manual

Replace the Mixing Chamber Piston

the mixing chamber volume depends on the model of the pump:
● 4 mL for a 50 mL/min pump (PLC 2050)
● 12 mL for a 250 mL/min pump (PLC 2250)
● 16 mL for a 500 mL/min pump (PLC 2500)
these volumes are calculated to give the best performance within the specified flow rate
range, but they can be easily modified by replacing the mixing chamber piston. for example,
for a 500 mL/min system (supplied with a 16 mL chamber) at 50 mL/min, it can be useful to
replace the chamber piston to ensure better mixing.
1. Purge the system with a suitable solvent.
2. Switch off the system and disconnect it from the mains.
3. Disconnect the SS tubing from the chamber outlet with a 3/8" spanner (SS nut). you have
to remove the tubing (i.e., disconnect it from the injection valve inlet).
Figure 68
mixing Chamber Piston removal
4. remove the four m5 screws with a 4 mm
allen wrench.
5. Carefully pull the piston to remove it.
6. Get a new piston with its Ptfe seal
already inserted.
7. insert the new piston into the mixing
chamber with the threaded hole on top.
8. replace the four fastening screws and
securely tighten them.
9. replace the tubing and securely tighten
the SS nuts.
68
maintenanCe
Chamber
outlet
|
PLC 2050/2250/2500 PurifiCation SyStemS
m5 Screws
Figure 69
mixing Chamber Piston
Ptfe Seal for mixing
Chamber Piston