7-5
5.2.2 Cleaning the Pump Head Assembly
NOTE: If you choose to remove the piston seal or self-flush
seals, you should have a new set on hand to install after
cleaning. It is not recommended that you reinstall used
piston or self-flush seals since they are likely to be
scratched and damaged during removal and would not
provide a reliable seal if reused. If you decide to remove the
seals, use only the flanged end of the plastic seal removal
tool supplied with the seal replacement kit and avoid
scratching the sealing surface in the pump head. See
Section 5.2.3 for seal replacement instructions.
1. Inspect the piston seal cavity in the pump head. Remove any foreign
material using a cotton swab, or equivalent, and avoid scratching the
sealing surfaces. Repeat for the self-flush housing. Be sure no fibers
from the cleaning swab remain in the components.
2. The pump head, check valves, and self-flush 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 re-
assembly.
CAUTION: When cleaning check valves, be sure that the
ball is not against the seat in the ultrasonic bath. This may
destroy the precision matched sealing surface and the valve
will not check.
CAUTION: If removing the check valves, keep them in the
orientation shown below the entire time they are not
installed in the pump head. The assemblies may fall apart,
parts may be lost, and they may not operate properly when
re-assembled.
Summary of Contents for BINARY SOLVENT DELIVERY MODULE
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