Metrohm 772 Pump Unit - Manual (Page 24)

5.2 Pump tubings
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772 Pump Unit
5.2 Pump tubings
Warning
Aggressive liquids
Leaking liquids can pose a risk of injury and damage instruments.
￭ Use suitable tubing only.
￭ Regularly check tubing for proper fastening and for damage and
wear.
Note
In every case, the user has sole responsibility with regard to suitability
and safety of pump tubing. Therefore, it is extremely important that
before each use, the safety and effectiveness of tubing is tested based
on application-specific laboratory, field or clinical tests.
5.2.1 Selecting the pump tubing
The most important decision when using peristaltic pumps is the selection
of suitable tubing material. Always use tubings particularly intended for
peristaltic pumps.
The 772 Pump Unit is shipped with PharMed® pump tubing (6.1826.100,
ø 6.4/9.6 mm, see Chapter 5.2.5) made of thermoplastic polypropylene,
which is highly suitable for aqueous media.
If you need other tubings for your application, take care to ensure the fol-
lowing points when evaluating the pump tubings:
￭ Chemical resistance
￭ Pressure build-up in the pump tubing
￭ Sterilizability
￭ Temperature of the pump medium and the environment
￭ Viscosity of the liquid
￭ Permeability of the pump tubing
￭ Demanded flow rate
￭ Tubing dimensions
We recommend using PVC, silicone, Viton® and PharMed® as the tubing
materials. Contact your laboratory dealer for information on suitable prod-
ucts and their data sheets.