Disassembling The Pump Head/Replacing Piston Seals - LC Packings SWITCHOS II User Manual

Maintenance and Troubleshooting

6.3.4 Disassembling the Pump Head/Replacing Piston Seals

To disassemble the inert pump head (titanium inlays):
a) Remove the pump head and the piston rods (Section 6.3.3).
16
Item
-
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
FIGURE 6-5. The Inert Pump Head Assembly
b) Loosen the two screws that attach the retaining plate to the pump head
(items 1, 2; FIGURE 6-5). As you remove the screws, alternate from one to
the other as long as the springs are loaded to avoid damaging the retaining
plate.
Note: Since the springs (item 5; FIGURE 6-5) exert a significant amount of force,
care should be taken when the screws are loosened.
6-6
18
11
15
14
13
10
12
13
14
15
Description
Inert Pump Head
Recessed-Head Screw
Retaining Plate
Piston Rod
Guide for Spring
Spring
Spacing Bolt
Support Washer
Piston Seal (backflushing)
Pressure Plate
O-Ring
Piston Seal (high pressure)
Titanium Inlay
Check Valve Cartridge
PEEK Adapter
Check Valve Bushing
Set Screw
Backflushing Connection
Connecting Tubing Pump Head
Notes: 1) Set of 4 piston seals (includes two high pressure seals and two
backflushing seals)
2) Used with the standard (stainless steel) version of the Switchos only.
3) Used with the inert version of the Switchos only.
D850R3
17
5
6
7
Detail of '13'
9
8
P/N
161399
-
-
160047
-
-
-
-
161020
-
160084
161020
161400
160049
162300
161071
-
-
162010
161023
3
4
1
2
Flow
Orientation Mark
1
1
2 Stainless steel
Titanium
3
User's Manual Switchos II