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BALINIT NALUBIA coating for mechanical seals for pumps

Mechanical seals, e.g. in pumps and compressors, use silicon carbide ceramics as seal ring materials. These are exposed to extreme tribological conditions over a long period of time which leads to overheating which results in the device failing. To keep these devices running reliably for longer, it is crucial to prevent these components from overheating under high operating forces and at high sliding speeds. BALINIT® NALUBIA ensures low operating temperatures thanks to its excellent dry running coefficient.

BALINIT® NALUBIA is exceptionally hard with a very low coefficient of friction. It can be used for applications where components are exposed to excessive heat generated by high friction. Due to the low coating temperature (< 100 °C) the coating can even be applied to components made from heat-sensitive materials, such as steels tempered at low temperatures and aluminum alloys.

Are you interested in a durable coating with low operating forces for ceramic seal discs in taps, pneumatic valves, ceramic shafts and pump bearings? 

Coating material ta-C
Coating technology Filtered Arc
Coating colour black
Coating hardness HIT [GPa]* > 40
Coefficient of friction (dry) vs. steel** 0.1
Max. service temp. [°C]**** 450
Process temperature [°C] < 100
Typical coating thickness [µm] 1 - 5
General remark All given data are approximate values, they depend on application, environment and test condition.
*Coating hardness HIT [GPa] Measured by nano indentation according to ISO 14577. For multilayers the hardness of the different layers varies. Hardness can be adapted to the application.
**Coefficient of friction (dry) vs. steel Determined by ball-on-disc test in dry condition with an Steel ball according to ASTM G99. During run-in the given values may be exceeded.
****Max. service temp. [°C] These are approximate values out of the field. Due to thermodynamic laws there is a dependency of pressure in application.

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