Dionex UltiMate 3000 Series, Руководство по эксплуатации

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UltiMate 3000 Series:
SD, RS, and BM Pumps
Operating Instructions Page 139
7.5.3 Replacing the Piston Seals
The seals prevent solvent from leaking into the rear seal wash system or into the pump.
This may cause unstable flow rates and baseline noise.
Each piston has two piston seals. One seal is in the pump head (

Fig. 34, no. 7, page 130);
the other seal is in the plate of the rear seal wash system (

Fig. 34, no. 3).
The replacement procedure for the piston seals in the pump head consists of
1. Removing the pump head and pistons (

page 135)
2. Disassembling the pump head and removing the pistons seals (

page 140)
3. Cleaning the pistons (

page 141)
4. Reassembling the pump head (

page 142)
5. Installing the pistons and pump head (

page 137)
6. After you have replaced the piston seals, observe the recommendations on page 144.
If you want to replace the piston seals in the plate of the rear seal wash system, follow the
steps on page 145.
Tips : The pump is shipped with reversed phase piston seals (RP).
Keep in mind that using chloroform, trichlorobenzene, methylene chloride,
tetrahydrofuran, or toluene as solvents chemically damages the UHMW-PE
seals. Chemical reactions may also occur when using tetrachloromethan,
diethyl ether, ethyl ether, di-isopropyl ether, ketones, methylbenzene,
methycyclohexane, and monochlorobenzene. If you use these solvents, contact
your Dionex sales representative.
For SD pumps, normal-phase piston seals are available as an option
(

page 197). As the abrasion may be slightly increased with normal-phase
piston seals, you should check the permeability of the static mixer or inline
filter (depending on the pump type) at regular intervals.