sealing ring is composed of one or a few parts cover ring, a fixed to the bearing ring or washer on and contact with another ring or washer or form a labyrinth of narrow gap and prevent the lubricating oil leakage and external invasion, because of its cross section is type O, so called type O sealing ring. Sealing ring is what material? What are the characteristics?

a nitrile rubber, NBR sealing ring

is suitable for oil and hydraulic oil, glycol hydraulic oil, the second ester lubricating oil, gasoline, water, silicone grease, silicone oil and other medium. Is currently the most useful, the lowest cost of rubber seals. Do not apply to the polarity of solvent, such as ketones, ozone, nitro hydrocarbon, MEK and chloroform. General use temperature range for the - 40~120 ℃。

2, HNBR hydrogenated nitrile rubber sealing ring

has excellent corrosion resistance, tensile and compression deformation characteristics, resistance to ozone, sunshine, good weather resistance. Has a better wear resistance than NBR. Suitable for washing machine, automobile engine system. Does not recommend the use of alcohols, esters and aromatic solution. General use temperature range for the - 40~150 ℃。

3, SIL silicon rubber sealing ring

has excellent heat resistant, cold resistant, resistant to ozone, atmospheric aging resistance performance. Have good insulation performance. But poor tensile strength than ordinary rubber and oil resistance. Suitable for home appliances such as electric water heater, electric iron, and microwave ovens. Also apply to all kinds of contact with the human body is supplies, such as kettle, water machine, etc. Not recommended for most concentrated solvent, oil, concentrated acid and sodium hydroxide. General use temperature range for the - 55~250 ℃。

4, VITON rubber seal fluorine element

high temperature resistance is better than that of silicone rubber, has excellent weather resistance, ozone resistance and chemical resistance, cold resistance is poor. For most of the oil and solvent resistance, especially the acids, aliphatic hydrocarbons, aromatic hydrocarbons, and animal and plant oil. Suitable for diesel engine, fuel system and chemical plant of sealing requirements. Is not recommended to ketones, esters of low molecular weight and contain a mixture of nitrate. General use temperature range for the - 20~250 ℃。

5, FLS fluorine silicon rubber sealing ring

its performance has both the advantages of the element fluorine rubber and silicone rubber, oil resistance, solvent resistance, resistance to fuel oil and the high and low temperature resistance are good. Can resist oxygen containing compounds, containing aromatic hydrocarbon solvent and erosion of chlorinated solvents. General use temperature range for the - 50~200 ℃。

6, EPDM EPDM rubber sealing ring

has the very good weathering resistance, ozone resistance, water resistance and chemical resistance. Can be used for alcohols and ketones, can also be used for the seal of high temperature steam environment. - generally use temperature range 55~150 ℃。

CR neoprene sealing ring,

sunlight resistance, weather resistance, especially good. Afraid of dichlorodifluoromethane and ammonia refrigerants, such as resistance to dilute acid, silicone oil, but low in aniline point of large amount of mineral oil in the expansion. At low temperature crystallization, hardening. Suitable for all kinds of contact with air, sunshine, ozone environment and various kinds of flame retardant, resistance to chemical corrosion of seal. Is not recommended in strong acid, nitro hydrocarbons, esters, chloroform and ketone of chemicals. General use temperature range for the - 55~120 ℃。

eight, IIR butyl rubber sealing ring

exceptionally good air tightness, heat resistant, resistant to sunlight, ozone resistance, insulation performance is good. In polar solvent such as alcohol, ketone, ester have good resistance ability, can be exposed to animal and plant oil or oxide. Suitable for resistance to chemicals or vacuum equipment. Not recommended with solvent oil, kerosene or aromatics used at the same time. General use temperature range for the - 50~110 ℃。

9, ACM acrylate rubber seal

has excellent resistance to oil, high temperature resistance, weather resistance are good, but the mechanical strength, compression deformation rate and resistance to water is a bit poor. Commonly used in automobile transmission system and power steering system. Does not apply to hot water, brake oil, phosphate ester. General use temperature range for the - 25~170 ℃。

10, NR, natural rubber sealing ring

rubber products have very good abrasion resistance, flexibility, breaking strength and elongation. But easy ageing, the air is heated becomes sticky, easy expansion and dissolved in mineral oil or gasoline, and alkali resistant, but not resistant to strong acid. Suitable for the automobile brake fluid, such as ethanol with hydroxyl ions in the liquid used. General use temperature range for the - 20~100 ℃。

11, PU polyurethane rubber seal

on the mechanical properties of the polyurethane rubber is very good, wear-resisting, high pressure resistance are much better than other rubber. Aging resistance, ozone resistance and oil resistance is also quite good, but high temperature hydrolysis. Commonly used in high pressure resistance, wear resistance sealing part. General use temperature range for the - 45~90 ℃。