User manual

Bio-inert Quaternary Pump User Manual 125

Maintenance

Seal Wear-in Procedure

1 Place a bottle with 100 mL of isopropanol in the solvent cabinet and put a

tubing (including bottle head assembly) into the bottle.

2 If an active inlet valve is installed, screw the PEEK adapter 1/4-28 to 10-32

(p/n 0100-1847) to the AIV and connect the inlet tube from the bottle head

directly to it.

3 Connect the Restriction capillary (p/n 5022-2159) to the purge valve.

Connect its other end to a waste container.

4 Open the purge valve and purge the system for 5 minutes with isopropanol

at a flow rate of 2 mL/min.

5 Close the purge valve and set the flow to a rate adequate to achieve a

pressure of 350 bar. Pump 15 min at this pressure to wear in the seals. The

pressure can be monitored using your instrument control software or tool.

6 Turn OFF the pump, slowly open the purge valve to release the pressure

from the system, disconnect the restriction capillary and reinstall the bottle

with the solvent for your application.

7 Rinse your system with the solvent used for your next application.

8 Replace the purge valve frit, see “Exchanging the Purge Valve Frit or the

Purge Valve” on page 119.

Parts required p/n Description

0100-1847 Adapter AIV to solvent inlet tubes

5022-2159 Restriction capillary

CAUTION

Seal damage

➔ This procedure is required for Standard seals (pack of 2) (p/n 5063-6589), but it will

damage the PE seals.

NOTE

The stainless steel restriction capillary is acceptable for a temporary test within a bio-inert

system. In case of concerns, a PEEK capillary (e.g. PEEK capillary, 150 cm length, 0.13 mm

i.d. (p/n 0890-1915)) and PEEK fittings (e.g. PEEK Fittings 10/PK (p/n 5063-6591)) may be

used instead.