Agilent Technologies SD-1 User Manual page 98

8
Maintenance and Repair
Replacing Check Valves
3 Insert the new check valve cartridge into the support.
The outlet check valve housing is smaller than the inlet check valve housing, and threads
N O T E
into the top of the liquid head. The cartridge must be inserted in the check valve housing as
shown below. The check ball must be above the seat in both types of check valve housing
so that it will seat by gravity.
4 Tighten the check valves into the liquid head by hand, then tighten each
Damage to the liquid head and the check valve
C A U T I O N
➔
5 Run the pump and inspect for leaks around each check valve. If leaks are
98
Figure 43 Orientation of check valve cartridges
liquid head a further 1/8th turn with an appropriately-sized open-ended
wrench.
Do not overtighten the check valve into the liquid head.
present, tighten the check valve only enough to stop the leak. Check for
leaks again, tightening only if necessary.
SD-1 Solvent Delivery - User Manual