Coating and surface protection systems

The gear units are available with surface protection OS 1, OS 2, OS 3, and OS 4.

The following descriptions provide an overview of the coating and surface protection systems.

OS 1 low environmental pollution

Suitable for environments prone to condensation and atmospheres with low humidity or contamination, such as outdoor applications under roofing or with safeguards, or unheated buildings where condensation can build up.
Based on corrosivity category: C2 (low)

Application examples

  • Systems in saw mills
  • Agitators and mixers

Condensation test ISO 6270

120 h

Salt spray test ISO 7253

–

 

OS 2 medium environmental pollution

Suited for environments with high humidity or moderate atmospheric contamination, such as applications outdoors that are subject to direct weathering.
Based on corrosivity category: C3 (medium)

Application examples

  • Applications in gravel plants
  • Cable transport systems

Condensation test ISO 6270

120 h

Salt spray test ISO 7253

240 h

 

OS 3 high environmental pollution

Suitable for environments with high humidity and occasional severe atmospheric and chemical contamination. Occasional acidic or caustic wet cleaning. Also for applications in coastal areas with moderate salt exposure.
Based on corrosivity category: C4 (high)

Application examples

  • Port cranes
  • Sewage treatment plants
  • Mining applications

Condensation test ISO 6270

240 h

Salt spray test ISO 7253

480 h

 

OS 4 very high environmental pollution

Suitable for environments with permanent humidity and severe atmospheric or chemical contamination. Regular acidic and caustic wet cleaning, also with chemical cleaning agents.
Based on corrosivity category: C5 (very high)

Application examples

  • Drives in malting plants
  • Wet areas in the beverage industry
  • Conveyor belts in the food industry

Condensation test ISO 6270

360 h

Salt spray test ISO 7253

600 h

 

Observe the following information on surface protection:

  • Standard top coat color RAL7031, can deviate depending on the order, see order documents.
  • Colors according to RAL
  • Water and hand perspiration repelling rust preventive applied to bare metal parts, shaft ends/flanges for external preservation.
  • Sheet metal parts, such as protective covers, are painted in RAL 1003 as standard.
  • If you need surface protection systems of a higher quality, contact SEW-EURODRIVE.