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Operation
M588-00-880 Issue E
4.9.2 Solvent flush
Use the following procedure to perform the solvent flush procedure:
1. Set up the GXS dry pumping system ready for the solvent flush procedure as described in Section 3.14 and take
note of the safety warnings regarding process compatibility.
2. Fit the solvent suction pipe supplied. For pump and booster combination systems, the solvent flush fluid
connection is on the rear panel, refer to Figure 3, item 11. For pump-only systems, refer to Figure 13, item 2.
3. Make up 5 litres of solvent solution using 1 litre of Loctite
®
7840 or Loctite
®
Natural Blue
®
with 4 litres of water.
Keep this ready in a suitable container.
4. Measure out another 2.5 litres of water into a separate container.
5. Put the pump into Green Mode/Standby mode (refer to Section 4.3).
6. Put the free end of the solvent suction pipe right down to the bottom of the container holding the 5 litres of
solvent solution.
7. Using the PDT, press the Setup button to enter the setup menu and then select the Command menu. An access
code is needed to enter the Command menu - enter 202 when prompted.
8. Scroll down to the DP Clean menu and then press ENTER to select.
9. Select ‘DP Clean On’ to start the solvent flush procedure. The solvent solution will then gradually be drawn into
the pump.
10.Depending on pump size it typically takes around 4-7 minutes to draw through the 5 litres of solvent solution
(larger pumps draw the liquid through more quickly than smaller pumps). Once the full 5 litres of solvent
solution have been drawn through, put the free end of the solvent suction pipe right down to the bottom of the
container holding the 2.5 litres of water. The water will flush through any solvent solution remaining in the
pump mechanism.
11.The pump typically takes another 2 - 4 minutes to draw through the water. Once all the water has been drawn
into the pump, the DP clean process continues with a purge cycle, drawing air or purge gas into the pump to dry
out the mechanism for the rest of the clean time.
Use of suitable protective gloves and eye protection is recommended when carrying out the
solvent flush procedure. Personal protective equipment should be checked and used as specified
by its supplier. Refer to the Loctite
®
7840 or Loctite
®
Natural Blue
®
MSDS for more information.
Take care when handling solvents and water. Any overflows or spills should be cleaned up to avoid
risk of slips.
Hot steam and liquid will exit the pump during the solvent flush procedure. Ensure that the
exhaust is piped away safely and that any solvents are disposed of in accordance with local and
national safety and environmental requirements.
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