Dionex ASE 100, Operator'S Manual

Page: 80 / 150

ASE 100 Operator’s Manual
5-10
Doc. 031842-01 5/02
5.4.2 Removing the Check Valves
1. Use a 1/2-inch open-end wrench to loosen the inlet check valve
housing. Remove the housing, and then remove the check valve
cartridge from the housing.
2. Turn the pump over, so that the outlet check valve is facing down.
3. Use a 1/2-inch open-end wrench to loosen the outlet check valve
housing. Remove the housing, and then remove the check valve
cartridge from the housing.
5.4.3 Cleaning the Check Valves
1. Place the check valve housings and cartridges in a beaker with
methanol. Sonicate or agitate for several minutes.
2. Rinse each check valve housing and cartridge thoroughly with
filtered, deionized water.
5.4.4 Reinstalling the Inlet Check Valve
1. The inlet check valve assembly housing has a 1/4-28 port. (This is the
larger of the two ports.) Place the inlet check valve cartridge
(P/N 047755) in the inlet check valve housing so that the double-hole
end of the cartridge is visible.
NOTE When correctly installed, liquid enters the
check valve through the large single hole and
exits through the small double holes.
2. Install the check valve assembly. Tighten the check valve assembly
just enough to seat (25 in-lb torque); tighten a little more only if it
leaks.
Overtightening may damage the pump head and the check
valve housing and crush the check valve seats.