Dionex UltiMate 3000 Series, Руководство по эксплуатации

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UltiMate 3000 Series:
SD, RS, and BM Pumps
Operating Instructions Page 153
7.8 Replacing the Purge Valve Knob
Description Part No.
Purge valve knob (with integrated cap seal) 6040.2035
Replace the purge valve knob if

Leakage is observed around the valve knob when the valve is open.

Leakage is observed on the purge outlet when the valve is closed.
1. If necessary, purge the pump to remove toxic solvents.
2. Set the pump flow rate to 0. Wait until the system pressure is down to zero.
3. To remove the purge valve knob from the purge unit, turn the knob counterclockwise
all the way and then pull it straight off the purge unit.
4. Before installing the new purge valve knob, consider cleaning the hole in the purge
unit with a cleaning swab (part no. 6040.0006).
5. Hold the new purge valve knob carefully. You should not hold the knob by the seal
end to avoid scratching the seals. These scratches will prevent proper seal and allow
leakage.
Fig. 52: Purge valve knob
6. Insert the purge valve knob into the purge unit, turn the knob clockwise, and tighten
fingertight. Tighten with your hand only (use no tool). Overtightening may destroy the
purge valve seals.
7. Resume operation and check whether liquid leaves the purge outlet. If it does, the
knob may not be tightened enough. Tighten the knob a little more.
Ring seal
Integrated cap seal