Summary
NBR is cost-effective for standard oils and moderate temperatures. Viton (FKM) offers higher heat and chemical resistance for demanding duty.
NBR vs Viton (FKM) comparison
| Factor | NBR | Viton (FKM) |
|---|---|---|
| Temperature | Moderate | Higher |
| Oils & greases | Good | Good |
| Fuels/chemicals | Limited | Better |
| Cost/availability | Typically lower | Typically higher |
| Service life | Standard duty | Longer in harsh media |
When to choose which
- Choose NBR for mineral oils and moderate temperatures.
- Choose Viton (FKM) for higher heat or aggressive media.
- Confirm shaft speed and pressure for lip wear.
- Share the operating environment (dust, chemicals, water).
- Verify availability and lead time for your size.
What to tell us for a fast quote
- ID × OD × width and lip type (SC/TC)
- Media and temperature range
- Speed (RPM) and duty cycle
- Preferred material if known
Related guides: unknown node • unknown node • unknown node