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The rated pressure of the VITON O-ring is usually determined based on its compression rate and hardness.

Generally speaking, the higher the hardness of the VITON O-ring, the higher its pressure resistance. Normally, the conventional hardness of nitrile rubber, EPDM rubber, and fluorine rubber is 70 degrees, while the conventional hardness of silicone is 50 degrees.

In addition, the compression rate of the O-ring can also affect its pressure resistance. Usually, the higher the compression rate, the higher the pressure resistance.

Therefore, when choosing to use VITON O-rings, it is necessary to determine their hardness and compression rate based on the actual usage environment and requirements to ensure that they can achieve the required pressure resistance.

It should be noted that the pressure rating is also related to the cross-sectional diameter of the O-ring. Generally speaking, the larger the cross-sectional diameter, the higher the pressure resistance. Therefore, when selecting an O-ring, it is necessary to choose the appropriate cross-sectional diameter based on the actual usage needs.

In addition, it should be noted that when the operating pressure exceeds the rated pressure, it may cause compression deformation, rupture, and other situations of the O-ring. Therefore, it is necessary to strictly follow the rated pressure when using it.