Seals refer to a category used to seal the contact surfaces between parts. They include sealing elements of various shapes, materials and sizes, such as O-rings, oil seals, etc. In general, seals broadly include sealing rings.
A sealing ring is a seal of a specific shape, usually annular, used to connect two parts to seal. It is made of annular rubber as the main material, with the characteristics of pressure resistance, wear resistance, and high temperature resistance. It is widely used in machinery, automobiles, aviation and other fields.
Although rubber and plastic seals are small, their role makes them the basic components and accessories in major national economic industries such as chemical, petroleum, coal, transportation and machinery manufacturing, and they occupy a very important position in the development of the national economy. Epoxy modified single-component product: has moderate thixotropy, can cover and wrap electronic components on the circuit board, the glue can be flattened by itself, but does not flow, and does not flow during the baking and curing process, maintaining the original shape; the cured product is black or amber light, has strong adhesion to circuit boards and electronic components, and can withstand high temperatures of 200-300℃ and strong acid and alkali corrosion and various solvent erosion; high bonding strength, good heat resistance, excellent solvent resistance, bonding strength can reach device destruction, temperature resistance can also reach device destruction, the cured product is not corroded by professional solvents, which can protect circuits and electronic components and prevent internal technology leaks of devices; good bonding strength and stable performance. Low viscosity, good fluidity, no bubbles, good toughness.
Sealing ring: suitable for use in media such as petroleum hydraulic oil, glycol hydraulic oil, diester lubricating oil, gasoline, water, silicone grease, silicone oil, etc. It is a rubber seal with wide applications and low cost. HNBR hydrogenated nitrile rubber seal ring: It has excellent corrosion resistance, tear resistance and compression deformation resistance, and has good ozone resistance, sunlight resistance and weather resistance. It has better wear resistance than nitrile rubber. It is suitable for washing machinery, automobile engine systems and refrigeration systems using the new environmentally friendly refrigerant R134a. SIL silicone rubber seal ring: It has excellent heat resistance, cold resistance, ozone resistance and atmospheric aging resistance. It has good insulation properties. However, its tensile strength is worse than that of ordinary rubber and it is not oil-resistant. It is suitable for household appliances such as electric water heaters, electric irons, microwave ovens, etc. It is also suitable for various items that come into contact with the human body, such as kettles, water dispensers, etc. VITON fluorine rubber seal ring: It has better high temperature resistance than silicone rubber, some weather resistance, ozone resistance and chemical resistance, but poor cold resistance. It has resistance to most oils and solvents, especially acids, aliphatic hydrocarbons, aromatic hydrocarbons and animal and vegetable oils. It is suitable for the sealing needs of diesel engines, fuel systems and chemical plants. It is not recommended to use with ketones, low molecular weight esters and mixtures containing nitric acid.
Therefore, seals and sealing rings are both components used to seal between parts. The difference between the two lies mainly in the scope of action and shape. Seals are more common than sealing rings, while sealing rings are a special form of seals.