82 1260 Infinity Binary Pump User Manual
5 Optimizing Performance
When to Use Alternative Seals
When to Use Alternative Seals
The standard seals for the binary pump can be used for most applications.
However, normal phase applications (for example, hexane) are not
compatible with the standard seals. They cause extremely high abrasion
and significantly shorten seal life time.
For the use with normal phase applications special polyethylene pistons
seals (yellow color, PE seals (pack of 2) (0905- 1420)) are available. These
seals have less abrasion compared to the standard seals.
1 Remove the standard seals from the pump head (“Maintenance of a
Pump Head without Seal Wash” on page 159).
2 Install normal phase seals.
The seal wear-in procedure causes problems to the normal phase seals (yellow).
They will be destroyed by the procedure.
➔ DO NOT apply the seal wear-in procedure performed to normal phase seals.
Polyethylene seals have a limited pressure range of 0–200 bar. When used above 200 bar,
their lifetime will be significantly reduced.
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