User Manual of CIC-D100 Ion Chromatograph
51
An inner diameter of 0.75mm
Teflon pipe
Part of six-way valve connected with the
waste liquid
An outside diameter of 1/8 inch
Teflon pipe
Part connecting REGEN OUT port of the
suppressor
Table 6-2 Joint uses
Joint type
Use
Manual tightening PEEK
Flow path connection
Hex wrench
PEEK
Connecting the six-way valve interface
PEEK, 1/8 inch inside diameter
Connecting REGEN OUT port of the
suppressor
6.3 Replacement and cleaning of the check valve
Contaminated check valve will lead to unstable system pressure and flow rate. Therefore,
cleaning or replacing check valves can be considered when such situation occurs.
6.3.1 Steps of cleaning check valve
1. Close the infusion pump;
2. Use a wrench to unscrew the stainless steel joints of the inlet and outlet check valves on
the pump head counterclockwise;
3. Take out the check valve and place it in a beaker containing 1: 1 pure water/nitric acid
solution or absolute ethyl alcohol for several minutes.
4. Take out the check valve after the end of ultrasound cleaning, and use ear washing ball to
blow the check valve to judge whether it is unobstructed;
5. Clean the check valve with ultrapure water, confirm the direction of the check valve,
reinstall the check valve and tighten the joint;
