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Disinfektion of PP-Rotors
Autoclaving
The recommended time for autoclaving: 15 – 20 min at 121°C/250°F, (1 bar)
ATTENTION: The sterilization time of 20 min. must not be exceeded. Continuous sterilization
will cause reduction in the mechanical resistance, of the plastic material.
Before autoclaving the PP-rotor and adapter, thoroughly clean to avoid the burning of dirty residue.
Please disregard any consequences of chemical residues to plastic materials, at ambient
temperatures. At high temperatures, autoclaving residue may corrode and destroy the plastic. The
objects must be thoroughly washed with distilled water, after the cleaning, but before the
autoclaving. Residues of any cleaning liquids, may cause fissures, whitening and stains.
Gas Sterilization
Adapters, bottles and rotors may be gas sterilized, with Ethylenoxyd. According to the duration of the
application, allow items to properly air out, after the sterilization and before usage
ATTENTION: The temperature may rise during the sterilization; rotors, adapters and bottles
should not be fully closed, keep completely unscrewed.
Chemical Sterilization
Bottles, adapters and rotors may be treated, with the usual liquid disinfectants.
ATTENTION: Before applying any other, Cleaning Resp. Decontamination Method, other than
what was recommended by the manufacturer, contact the manufacturer to ensure that it will
not damage the unit or the rotor.
Glass Breakage
With high g-values, the rate of glass tube breakage increases. Glass splinters have to be removed
immediately from rotor, buckets, adapters and the rotor chamber itself. Fine glass splinters will
scratch and therefore damage the protective surface coating of a rotor. If glass splinters remain in
the rotor chamber, fine metal dust will build up, due to air circulation. This very fine, black metal dust
will severely pollute the rotor chamber, the rotor, the buckets, and the samples.
If necessary, replace the adapters, tubes and accessories, to avoid further damage. Check the rotor
bores regularly, for residue and damage.
ATTENTION: Please check the relevant specifications of the tubes centrifuges with the
manufacturer!
Lifetime of Rotors, Round and Rectangular Buckets, Accessories
Rotors and rotor lid made of aluminum or stainless steel, have a operating time of max. 7 years
from first use.
Transparent rotor lids and caps, made of PC or PP, as well as rotors, tube racks and adapters of
PP, have a maximum operating time of up to 3 years, from first time use.
Conditions For the Operating Time:
Proper use, damage-free condition, recommended care.
© Hermle Labortechnik GmbH
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