Is it necessary to consider the required pressure rating when selecting an O-ring sealing ring?

When choosing O-ring sealing rings, it is indeed necessary to fully consider the required pressure rating. As a sealing component, the performance of O-ring is directly related to the sealing effect and service life, and pressure level is one of the important indicators to evaluate its performance.
Firstly, the pressure rating of an O-ring mainly depends on its hardness and material. O-rings of different hardness and materials can withstand different pressure ranges. Generally speaking, O-rings with lower hardness are suitable for low-pressure applications, while those with higher hardness are suitable for medium or high-pressure applications. For example, O-rings with a hardness of 70-80 Shore hardness are suitable for low-pressure applications and can withstand a pressure range of 0-16MPa; O-rings with a hardness of 90-95 Shore hardness are suitable for medium pressure applications and can withstand a pressure range of 16-32 MPa; O-rings with a hardness of 95-100 Shore hardness are suitable for high-pressure applications and can withstand a pressure range of 32-100MPa. These values are only general reference values and need to be selected according to specific operating conditions in practical applications.
Secondly, in addition to hardness and material, factors such as the size of the O-ring, working temperature, and the physical and chemical properties of the working medium can also affect its pressure rating. Therefore, when selecting O-rings, it is necessary to consider these factors comprehensively to ensure that the selected O-rings can meet the needs of actual working conditions.
In addition, it should be noted that the installation of O-rings and the design of the sealing system are also key factors affecting their pressure rating. The correct installation method and reasonable sealing system design can fully utilize the sealing performance of O-rings, improve their pressure rating and service life.
In summary, when selecting O-ring sealing rings, it is necessary to fully consider the required pressure rating, and comprehensively consider factors such as hardness, material, size, working temperature, and the physical and chemical properties of the working medium when making the selection. At the same time, attention should be paid to the installation of O-rings and the design of sealing systems to ensure that they can achieve the good sealing effect in practical applications.