O-rings are a type of part widely used in industrial sealing, and their selection process directly affects the performance and service life of the equipment. To ensure that you choose the most suitable O-ring and get efficient and accurate service, the following are the key factors and specific suggestions to consider when purchasing O-rings:
1. Size: Determine according to drawings or samples
The size of the O-ring is the basis for selection, including the inner diameter, outer diameter and cross-sectional diameter. If you can provide clear technical drawings or existing samples, it will help ensure the precise matching of the size. If there are no specific parameters, please inform the sealing requirements of the equipment, and our technical team will assist you in recommending the appropriate specifications.
2. Material: Choose the right rubber type according to the application scenario
Different application scenarios have special requirements for the material of the O-ring. Common rubber materials include:
Silicone (SILICONE): High and low temperature resistance, suitable for food grade and medical applications.
NBR: Good oil resistance, suitable for petroleum and lubricating oil environments.
EPDM: Aging, ozone and corrosion resistance, suitable for outdoor and chemical environments.
Fluororubber (FKM): Excellent high temperature and chemical resistance.
Natural rubber (NR): Good elasticity, suitable for general industrial applications.
Other materials such as hydrogenated nitrile rubber (HNBR), fluorosilicone rubber (FVMQ) and perfluororubber (FFKM) are suitable for more special environmental requirements.
3. Hardness: 10 Shore A~90 Shore A optional
Choose the appropriate hardness grade according to the pressure and movement of the sealing environment. Low hardness (10-40 Shore A) is suitable for flexible seals, and high hardness (60-90 Shore A) is suitable for high pressure and high wear conditions.
4. Color: Customized according to requirements
The conventional color is black, but white, transparent or o
