Replacing 1525µ Check Valves
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4
Replacing the Inlet Check Valve
1.
Purge the pump with methanol. If methanol is not miscible with your current eluent,
use an intermediate eluent.
2.
Hold the check valve housing with the 1/2-inch adjustable wrench. Use the 5/16-inch
open-end wrench to loosen the compression screw and remove the tubing assembly
from the inlet check valve housing.
3.
Use the 1/2-inch adjustable wrench to remove the inlet check valve housing from the
pump head (
Figure 4-4 Disconnecting the Inlet and Outlet Tubing (1525µ Pump)
4.
Remove the cartridge from the housing and replace it with the new cartridge.
Note:
To help keep the cartridge seated within the housing, moisten it with methanol
during installation.
5.
With the housing held upright to prevent the cartridge from falling out, finger- tighten
the housing into the pump head. Tighten the check valve another 1/4-turn with the
1/2-inch adjustable wrench.
STOP
Attention:
Before starting this procedure, move the eluent reservoir below the pump
head level. This eliminates gravity flow of the eluent.
STOP
Attention:
The arrow printed on the check valve cartridge indicates the
direction in which it will allow liquid to flow. Therefore, its direction is critical
for proper operation. For all check valve assemblies, the arrow should point
upward when installed on the pump.
Compression Screws
Outlet Check Valve
Pump Heads
Outlet Tubing
Housings
Inlet Check Valve
Housings
Inlet Tubing
Summary of Contents for 1525EF
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