Hints For Successful Use Of The Pump - Agilent Technologies 1260 Infinity VL User Manual

4
Using the Pump

Hints for Successful Use of the Pump

Hints for Successful Use of the Pump

• Always place the solvent cabinet with the solvent bottles on top of the
• When using salt solutions and organic solvents in the quaternary pump it is
• Before operating the quaternary pump, flush the pump and vacuum
• Prevent blocking of solvent inlet filters. Never use the pump without solvent
• Regularly check the purge valve frit and column frit. A blocked purge valve
• When using the quaternary pump at low flow rates (for example,
• Whenever exchanging the pump seals the purge valve frit should be
• When using buffers or other salt solutions, flush the system with water
• Check the pump pistons for scratches when changing the piston seals.
• Pressurize the system according to the wear in procedure after changing
• Consider recommendations given in the solvent information section, see
48
quaternary pump (or at a higher level).
recommended to connect the salt solution to one of the bottom gradient
valve ports and the organic solvent to one of the upper gradient valve ports.
It is best to have the organic channel directly above the salt solution
channel. Regular flushing of all MCGV channels with water is recommended
to remove all possible salt deposits in the valve ports.
degasser, see "Regular Priming"
recommended if it has been turned off for some time (for example,
overnight) and volatile solvent mixtures are used in the channels.
inlet filter. Prevent the growth of algae, see
Filters" on page 49).
frit can be identified by a black or yellow surface, deposits or by a pressure
greater than 10 bar, when pumping distilled water at a rate of 5 mL/min
with an open purge valve.
0.2 mL/min) check all 1/16-inch fittings for any signs of leaks.
exchanged, too.
before switching it off. The seal wash option should be used when salt
concentrations of 0.1 M or higher will be used for long time periods.
Scratched pistons will cause micro leaks and will decrease the lifetime of
the seal.
the piston seals (see
Option" on page 121).
"Solvent Information"
on page 44). This is especially
"Maintenance of a Pump Head Without Seal Wash
on page 51.
1260 Infinity QuatPump VL User Manual
"Prevent Blocking of Solvent