In actual use, the pressure range of O-rings is a problem worthy of people's attention. The pressure range affects its performance and applicable scenarios. The following is the introduction of relevant standards:
Pressure range:
The pressure range of a sealing ring usually refers to the limited range of working pressure it can withstand. Working pressure refers to the medium pressure the sealing ring withstands in actual use, including static and dynamic pressure. Factors such as manufacturing materials, hardness, size, and sealing structure usually determine the pressure range of a sealing ring.
Generally speaking, the pressure range of a sealing ring can be divided into three levels: low pressure, medium pressure, and high pressure. The low-pressure range is generally below 0.1MPa, the medium-pressure range is from 0.1MPa to 10MPa, and the high-pressure range is above 10MPa. This range is not a strict division, and the specific pressure range is also affected by factors such as the diameter, cross-sectional shape, and operating temperature of the sealing ring.
Related standards for sealing rings:
A series of relevant standards have been formulated internationally to ensure the quality and performance of O-rings. ISO 3601 is one of the international standards for sealing rings. The ISO 3601 standard specifies the size, material, hardness, pressure range, etc. of the sealing ring in detail, providing a reference for manufacturers and users.
The ISO 3601 standard usually expresses the sealing ring's pressure range in MPa (megapascals). This helps users clarify the applicable working pressure range when selecting and using the sealing ring to ensure the sealing effect and safety.
Application characteristics under different working conditions:
Low-pressure application: In the low-pressure range, the sealing ring is usually used in some ordinary sealing occasions, such as household appliances, faucets, pipe connections, etc. Its simple structure and low manufacturing cost are suitable for some occasions that do not require high sealing performance.
Medium pressure application: The sealing rings in the medium pressure range are widely used in industrial equipment, hydraulic systems, automobile engines, and other fields. Since higher sealing performance is required under medium pressure environment, the selection of the sealing ring needs to be determined according to the specific working conditions to ensure that it can work stably and reliably.
High-pressure application: In the high-pressure range, O-rings are usually used in some special industrial equipment, hydraulic cylinders, high-pressure pipelines, and other occasions. For sealing rings in high-pressure environments, the selection of manufacturing materials and manufacturing processes are more critical to ensure that they have good elasticity and durability under high pressure.