Choosing the wrong oil seal material can cause leaks, failures, and costly downtime.
FKM offers superior performance in high heat and chemical resistance. NBR is more affordable and flexible in low-temperature environments.
Let’s break down how to compare them—by temperature, fluid compatibility, durability, and price.
What are the key differences between FKM and NBR oil seals?
Understanding performance gaps helps you pick the right material for the job.
FKM resists heat and chemicals better, while NBR performs well under moderate conditions and costs less.
| Tính năng | FKM | NBR |
|---|---|---|
| Phạm vi nhiệt độ | -26°C to +205°C | -40°C đến +120°C |
| Kháng hóa chất | Xuất sắc | Tốt |
| Chống mài mòn | Tốt | Xuất sắc |
| Trị giá | Cao hơn | Thấp hơn |
| Tốt nhất cho | High-temp/chemical exposure | Hệ thống thủy lực chung |
FKM is ideal for fuel systems, chemical pumps, and high-speed motors. For general maintenance, Vòng đệm chữ O NBR remain the most popular choice.
How do temperature ranges compare between FKM and NBR?
Temperature extremes affect seal life and function.
FKM maintains shape and elasticity up to +205°C. NBR remains flexible down to -40°C, ideal for cold-weather equipment.
| Vật liệu | Min Temp | Nhiệt độ tối đa |
|---|---|---|
| FKM | -26°C | +205°C |
| NBR | -40°C | +120°C |
If your system runs hot, Vòng chữ O FKM will ensure longer service life.
Which material offers better chemical resistance?
FKM outperforms NBR in aggressive environments.
It resists oils, fuels, acids, and many solvents, while NBR is limited to petroleum-based fluids.
| Loại chất lỏng | FKM | NBR |
|---|---|---|
| Dầu khoáng | ✔️ | ✔️ |
| Fuel | ✔️ | ✔️ |
| Axit | ✔️ | ⚠️ |
| Xeton | ⚠️ | ❌ |
| Coolants | ✔️ | ⚠️ |
Vòng chữ O FKM are often used in fuel injectors and chemical pumps, where failure isn’t an option.
How do FKM and NBR compare in terms of cost?
NBR offers solid performance at low cost. FKM delivers premium protection but with higher upfront investment.
| Vật liệu | Relative Cost | Tuổi thọ |
|---|---|---|
| FKM | Cao hơn | Long |
| NBR | Thấp hơn | Vừa phải |
Looking for both economy and safety? Consider dual-material kits for mixed systems.
Phần kết luận
FKM excels in heat and chemical resistance; NBR wins on affordability and cold weather use.
Need Help Choosing Your Oil Seal?
📩 Email: [email protected]
📱 WhatsApp: +86 17622979498
Related topic
VI 
EN 
BN 
AR 
CS 
DA 
DE 
EL 
EO 
ES 
IT 
FR 
PT 
ID 
JA 
RU 
ML 
RO 
UK 
TR 
TH 
KO