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Seal Ring To Prevent Oil Leakage And Foreign Matter Intrusion

Mar 25, 2019

A seal ring is made of one or several parts, it is used to forms a narrow labyrinth gap to prevent oil leakage and foreign matter intrusion.


1. O type Sealing Ring

It is made of fluorine rubber, nitrile rubber, silica gel, ethylene propylene rubber, difluoro rubber and other materials. It is widely used in various machinery, resistant to various petroleum base oils and various chemical media: it can work under temperature range 60℃~200℃. (double-fluorinated rubber FFKM through a specific vulcanization method up to 300 degrees or more) ,  pressure range: <10MPa (hydraulic), <1MPa (pneumatic),  <16MPa (static seal) of NBR The rubber and gasoline resistant (90, 93, 97) expansion ratio is zero.

2. Y type Seal Ring

Y sealing rings are made of fluorine-containing rubber, nitrile rubber, chlorine rubber and other materials, are widely used in hydraulic, mechanical, pneumatic and other industries. The resistant petroleum base oil has excellent wear resistance, and different rubber types can be used to meet the temperature range of 60℃~200℃.

3.V type Seal Ring

It is an axially acting elastic rubber seal that acts as a pressureless seal for the shaft. 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 prevent external water splash or dust from entering.

4.  YX type Seal Ring for Hole

This seal ring is used for pistons in reciprocating hydraulic cylinders. TPU: general hydraulic cylinder, general equipment hydraulic cylinder. CPU: Hydraulic cylinders for construction machinery and cylinders for high temperature and high pressure. Material: Polyurethane TPU, CPU, rubber Product hardness: HS85±2°, Working temperature: TPU: -40~+80℃, CPU: -40~+120℃, Working pressure: ≤32Mpa, Working medium: hydraulic oil, emulsion

5. YX type Baffle Ring

YX baffle ring is applicable to work with YX type seal ring when the working pressure of the cylinder is greater than 16MPa, or the function of protecting the seal ring when the cylinder is eccentrically stressed. Working temperature: -40~+100℃, Working medium: hydraulic oil , emulsion, aquatic product hardness: HS92 ± 5A,  Material: polytetrafluoroethylene



PTFE seal ring has excellent sealing performance and long working life. The dynamic pressure sealing working life is 5~10 times higher than the conventional rubber sealing products. Its service life can be long as the sealing substrate.

The frictional resistance of the sealing ring is very small, and the dynamic and static frictional forces are equal. It is 1/2-1/4 of the friction force of the O seal ring, which can eliminate the “crawling” phenomenon of low-speed and low-pressure movement.


The PTFE sealing ring is highly wear-resistant and has an automatic elastic compensation function after the sealing surface is worn.

The PTFE seal ring has good self-lubricating properties. Can be used as an oil-free lubrication seal.

The sealing ring has a simple structure and is easy to install.

PTFE seal ring working pressure: 0~300MPa, working speed: ≤15m/s; working temperature: -55-250℃.

Sealing ring for medium: hydraulic oil, gas, water, mud, crude oil, emulsion, water-glycol, acid, alkali, chemicals, etc.