Dionex AXP/AXP-MS Manual
2. The pump head, check valves, and flushing housing may be further
cleaned using a laboratory-grade detergent solution in an ultrasonic
bath for at least 30 minutes, followed by rinsing for at least
10 minutes in distilled water. Be sure that all particles loosened by
the above procedures have been removed from the components
before reassembly.
3. If you removed the check valves, tighten each check valve firmly
by hand. Each check valve assembly contains two capsules. The
sapphire seat in each capsule must be oriented downward in the
final pump assembly.
Note: The inlet check valve has a larger opening (1/4”-28, flat-
bottom seat) for the 1/8-in. inlet tubing; the outlet check valve has
a smaller opening (#10-32, cone seat) for the 1/16-in. outlet tubing.
The inlet check valve must be connected at the larger opening in
the pump head.
If you removed the piston seal, insert a new seal as described in
Section 5.2.2. When you finish, replace the pump head as
described in Section 5.2.5.
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