Pos: 64 /100 Sig ma/100 BA Zentrif ugen Sigma (S tandardmod ule)/030 Sicher heit/030-0060-0 070-0040 L ebensdauer Sigm a Comfort Rot orbeschichtung @ 105\mod_ 16953752519 61_68.docx @ 1222758 @ 4 @ 1
3.6.7.4 Service life of the Sigma "Comfort" rotor coating
Marking
ll "Comfort" coated swing-out rotors have a "C" shown after their number.
The bolts of these rotors do not require any greasing during the service life
of the coating.
A portfolio of the available rotors with "Comfort" rotor coating and
information on the service life of the coating can be found in the document
"Sigma Comfort rotor coating", which is provided with every rotor with
"Comfort" rotor coating.
Service life
The service life of the coating varies and depends on the degree of
utilisation of the rotor. Tests have shown a service life of 7,000 to 40,000
cycles. The service life of the "Comfort" rotor coating can be increased by
way of specific measures:
The following factors have an influence on the service life:
• Speed/load:
The service life of the coating can be increased by a factor of 3.5 if the
speed or load is decreased by approximately 15%. In case of a load
decrease by 20%, the service life increases approximately by a factor of
5.5.
• Temperature:
The service life of the coating decreases by approximately 30% at lower
temperatures (approximately 4°C) compared to room temperature
(approximately 20°C).
• Use of buckets:
The buckets and the rotor form a joint unit. For the coating to reach the
maximum possible service life, ensure to always use the same set of
buckets and to install the individual buckets in their specific position
within the rotor.
• Cleaning frequency:
Regular cleaning of the accessories is indispensable. The more
frequently the rotor needs to be cleaned, the shorter the service life of
the coating will be.
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