Dionex Easion Operator’s Manual
72
Doc. 155028-01 08/20
3. Install the inlet check valve assembly on the bottom of the primary pump
head. Install the outlet check valve assembly on the top of the head. Tighten
the check valves finger-tight, and then use a wrench to tighten an additional
one-quarter to one-half turn.
4. Reconnect the liquid lines and the power cord.
5. Turn on the Dionex Easion main power.
7. When the Dionex Easion is at operating pressure, check for leaks from the
check valves. Tighten a check valve a
little more
only if it leaks.
5.7
Cleaning Pump Check Valves
If a check valve leaks or is dirty, both check valves should be replaced (see
). However, if new check valves are not available, follow the
instructions here to clean both check valves and reinstall them.
1. Follow
through
in the check valve replacement procedure to
remove the check valve cartridges from the valve housings.
2. Place the check valve housings and cartridges in a beaker with methanol.
Sonicate or agitate the parts for several minutes.
3. Rinse each check valve housing and cartridge thoroughly with filtered
deionized water.
4. Follow
through
in the check valve replacement procedure to
reinstall the check valves.
Overtightening may damage the pump head and check valve housing
and crush the check valve seats.
