SEW EURODRIVE
119
Surface protection (OS)
Surface protection
Ambient conditions/sample applications
Standard
For machines and systems in buildings and rooms indoors with neutral atmospheres.
– C1 (negligible)*
Sample applications
– Machines and systems in the automobile industry
– Conveyor systems in logistics areas
– Conveyor belts at airports
OS1
For environments prone to condensation and atmospheres with low humidity or contamination.
E.g. outdoor applications under a roof or protection device.
– C2 (low)*
Sample applications
– Systems in saw mills
– Hall gates
– Agitators and mixers
OS2
For environments with high humidity or moderate atmospheric contamination.
E.g. applications outdoors subject to direct weathering.
– C3 (moderate)*
Sample applications
– Applications in amusement parks
– Funiculars and chair-lifts
– Applications in gravel plants
– Systems in nuclear power plants
OS3
For environments with high humidity and occasionally severe atmospheric and chemical
contamination. Occasional acidic or caustic wet cleaning.
Also for applications in coastal areas with moderate salt load.
– C4 (high)*
Sample applications
– Sewage treatment plants
– Port cranes
– Mining applications
OS4
For environments with permanent humidity and severe atmospheric or chemical contamination.
Regular acidic and caustic wet cleaning, also with chemical cleaning agents.
– C5-I (severe)*
Sample applications
– Drives in malting plants
– Wet areas in the beverage industry
– Conveyor belts in the food industry
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