12 hot-selling seal categories in 2025

Different types of sealing rings are determined according to the requirements of product applications, such as V-shaped sealing rings, U-shaped sealing rings, O-shaped sealing rings, Y-shaped sealing rings, etc. Different types of sealing rings have different media resistance, hardness, and scope of use.

1. V-shaped sealing ring

It is an axially acting elastic rubber sealing ring used as a pressure-free seal for rotating shafts. The sealing lip has good mobility and adaptability, can compensate for large tolerances and angular deviations, can prevent internal grease or oil from leaking out, and can also prevent splashing water or dust from the outside.

2. U-shaped sealing ring

It is often used to manufacture reciprocating seals in hydraulic systems. It is widely used in the sealing of hydraulic cylinders in engineering machinery.

3. O-shaped sealing ring

It is mainly used for static sealing and reciprocating motion sealing.

When used for rotary motion sealing, it is limited to low-speed rotary sealing devices.

4. Rectangular sealing ring

It is generally installed in a groove with a rectangular cross-section on the outer circle or inner circle to play a sealing role.

5. Y-type sealing ring

Widely used in reciprocating sealing devices.In addition, there are spring tension (spring energy storage) sealing rings, which are made by adding a spring to the PTFE sealing material. There are O-type springs, V-type springs, and U-type springs.

6. YX-type sealing rings for holes

Product use: used for sealing pistons in reciprocating hydraulic cylinders.

Scope of application: general hydraulic cylinders, general equipment hydraulic cylinders, hydraulic cylinders for engineering machinery, and high-temperature and high-pressure cylinders.

Material: polyurethane, rubber.

Product hardness: HS85±2°A.

Working temperature: -40～+120.

Working pressure: ≤32Mpa.

Working medium: hydraulic oil, emulsion.

7. YX-type retaining ring (sealing ring) for holes

Product use: This standard is applicable to the use of YX-type sealing rings when the working pressure of the cylinder is greater than 16MPa, or when the cylinder is eccentrically stressed, it plays the role of protecting the sealing ring.

Working temperature: -40～+100.

Working medium: hydraulic oil, emulsion

Hardness: HS92±5A

Material: polytetrafluoroethylene.

8. YX-type sealing ring for shaft

Product use: used for sealing the piston rod in the reciprocating hydraulic cylinder.

Scope of application: TPU: general hydraulic cylinder, general equipment hydraulic cylinder, hydraulic cylinder for engineering machinery and high temperature and high pressure cylinder.

Material: polyurethane, rubber.

Product hardness: HS85±2°A.

Working temperature: -40～+120

Working pressure: ≤32Mpa.

Working medium: hydraulic oil, emulsion.

9. YX-type retaining ring (sealing ring) for shaft

Product use: This standard is applicable to the use of YX-type sealing ring when the working pressure of the cylinder is greater than 16MPa, or when the cylinder is eccentrically stressed, it plays the role of protecting the sealing ring.

Working temperature: -40～+100.

Working medium: hydraulic oil, emulsion, water. Product hardness: HS92±5A.

Material: polytetrafluoroethylene

10. O-type rubber sealing ring

Product use: The O-type rubber sealing ring in this standard is suitable for hydraulic and pneumatic systems and various mechanical equipment and components. It plays a sealing role in static or moving state under the specified pressure, temperature and different liquid and gas media.

Working temperature: -40～+230.

Working medium: air, water, oil.

Product hardness: 40～85±2A.

Material: nitrile rubber, silicone, fluorine rubber, ethylene propylene rubber

11. O-ring retaining ring (sealing ring)

Product use: This standard is applicable to the use of O-rings when the cylinder pressure is greater than 10MPa.

Working temperature: -100～200

Working medium: hydraulic oil, emulsion, water

Material: polytetrafluoroethylene

12. J-type skeletonless dust ring (seal ring)

Product use: used for dust prevention of the exposed piston rod or valve stem in reciprocating cylinders and cylinders.

Scope of application: engineering machinery, general machinery, various valves of cylinders, engineering machinery cylinders, oil and gas cylinders with harsh working conditions.

Material: polyurethane, nitrile rubber.

Working temperature: -40～120.

Product hardness: HS80±5A

Conclusion:

FA Seals has been a reputable leading distributor and manufacturer of premium sealing products. We take pride in providing global customers with hydraulic sealing products from the most trusted brands, including WKF, Hallite, and UKS. Our extensive range of sealing solutions includes face seals, hydraulic seals, seal kits, and more. We are committed to delivering exceptional service and product quality that meets the standards required for our customers’ equipment and applications. With over 28,000 uniquely designed sealing products to choose from, we help clients maintain the efficient operation of their machinery.FA Seals – Your Top Choice for O-Rings and sealing products. Request a quote and have it shipped the same day!