The different color of the sealing ring mainly represents the difference of its material, performance and application scene. The following is a specific analysis of different color seals:
First, common colors and their corresponding materials
Black:
Common materials: nitrile butadiene rubber (NBR), fluorine rubber (FKM, FPM, VITON), EPDM, hydrogenated nitrile butadiene rubber (HNBR), etc.
Performance characteristics: usually has good elasticity and sealing, can withstand a certain degree of high temperature and corrosion of chemical media, but the resistance to oily media may be weak.
Application scenario: Widely used in a variety of conventional equipment, especially need to withstand a certain temperature and chemical corrosion occasions.
White:
Common material: silicone (SIL, VMQ).
Performance characteristics: Excellent high temperature resistance, acid and alkali resistance, oxidation resistance.
Application scenario: It is often used in food, medicine and other industries that need to avoid pollution, and it is also suitable for high temperature, high pressure and high-speed operation equipment.
Blue:
Common material: fluorine rubber or other special materials.
Performance characteristics: usually has a strong oil and chemical corrosion resistance, can withstand high temperature and high pressure environment.
Application scenario: Often used in steam systems or need to withstand high temperature and pressure and oily media occasions.
Red:
Common material: silica gel, fluorine silica gel (FVMQ), etc.
Performance characteristics: Excellent high temperature resistance, oil resistance.
Application scenario: It is often used to seal organic solvents such as chemicals and oils, and is also suitable for equipment with high temperature, high pressure and high speed operation.
Green:
Common material: silicone rubber or other special materials.
Performance characteristics: Good resistance to high temperature and chemical media, wear resistance, anti-aging, anti-corrosion ability.
Application scenario: Suitable for gas, oily liquid and flammable media sealing, also often used in the need to withstand acidic or alkaline media occasions.
Brown:
Common material: fluorine rubber or other specific materials.
Performance characteristics: According to the specific material, but usually has better sealing and corrosion resistance.
Application scenarios: Brown seals are used in some special industries and application scenarios, such as the sealing of wood in the building materials industry, or in some mechanical seals.
Second, the correlation between color and performance
Although the color of the sealing ring is not an absolute one-to-one correspondence with its performance, the color can be used as a reference for preliminary judgment of the material and performance of the sealing ring. For example, black seals are often used for general sealing applications; White seals are often used in industries that need to avoid contamination; Blue and red seals usually have strong oil and chemical resistance; The green sealing ring usually has better resistance to high temperature and chemical media.
3. Choose suggestions
When selecting the sealing ring, in addition to considering the color, the following factors need to be considered:
Working environment: including temperature, pressure, medium, etc.
Material compatibility: Ensure that the seal material is compatible with the contact medium to avoid chemical reactions or corrosion.
Sealing requirements: Select the appropriate sealing ring type and size according to the sealing requirements of the specific application scenario.
Durability: Consider the service life and wear resistance of the sealing ring to ensure that it maintains a good sealing effect in long-term use.
The color of the sealing ring mainly represents the difference in its material, performance and application scene. When selecting a seal ring, a variety of factors should be considered to ensure that it meets the needs of practical applications.
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