An O-ring is a doughnut-shaped sealing element, typically made from various elastomers like Nitrile, FKM, or Silicone. Its primary function is to block the passage of fluids or gases by creating a secure seal between two mating surfaces. When compressed in a gland, the O-ring's elastic material deforms to fill the gap, preventing leaks. Known for their simplicity, reliability, and cost-effectiveness, O-rings are fundamental components in countless applications. They are essential in hydraulic and pneumatic systems, plumbing, automotive engines, and various industrial machinery. Their effectiveness relies on proper material selection for compatibility with the operating fluid, temperature, and pressure conditions.
FKM is a premier fluorocarbon elastomer known for its exceptional thermal and chemical resistance. Offering a wide spectrum of resistance, it maintains a relatively good compression set even at elevated temperatures.

Application Range
Temperature [° C]: -20...+200
Sliding speed [m/s]: 1
Medium: Compatible with mineral oil-based hydraulic fluids, barely flammable hydraulic fluids, water, air, and more.
Application
Industrial hydraulic systems
Machine tools
Presses
Sizes
Available in any size from 0-400mm to unlimited
Customizable in any cross-sectional size
No tooling charge (depending on quantity)
Rapid delivery, sometimes as quick as 1 day
Available in various commercial rubber materials:
- Nitrile/NBR/Buna-N, 70 & 90 Durometer
- Polyurethane/Urethane, 70 & 90 Durometer
- FKM, 75 & 90 Durometer
- EPDM
- Silicone, 70 Durometer


1. How can you get a free sample?
Answer: Samples are free, but you need to cover the freight charges.
2. Can products be made according to my structural drawing?
Answer: Absolutely, we can manufacture according to your structural drawings.
3. Why choose Guangdong DEF Seals Solutions Co., Ltd?
1. Professional and reliable service.
2. Complete production line ensuring quick delivery.
3. State-of-the-art equipment, high quality, and competitive pricing.
4. Passionate commitment to excellence.
5. Always ready to serve you.