As a common sealing material, O-rings are useful in many equipment. Today, let's talk about how to select a suitable O-ring for chemical machinery and equipment.
First of all, chemical machinery and equipment are mostly in contact with chemicals. We can't use one at random. The common O-rings include polyurethane, rubber and CPU, because rubber is easy to react with many chemicals, resulting in changes in toughness and strength, or even direct adhesion, which is equivalent to waste, Therefore, for chemical machinery, we generally choose O-rings of the other two materials.
Secondly, let's see whether a parameter of the O-ring of the other two materials meets our requirements. The high temperature working point of TPU is about 80 degrees, and the CPU is about 120 degrees, so the CPU is naturally more resistant to high temperature than the O-ring of TPU. The natural price is also higher than TPU, so we can choose according to our actual needs.
Finally, the selection of O-ring depends on several other options. Wear resistance, if the contact surface is broken, whether it has the automatic filling function, the friction resistance of O-ring, and the movement of O-ring under different speeds and pressures.
In this way, we can select the appropriate O-ring according to the specific situation of chemical machinery.
