What are the precautions for replacing the sealing ring of the cylinder?

What I want to share with you today is how to replace the sealing ring of the cylinder, and what points to pay attention to during the replacement process. In this issue, we mainly use SMC as an example. The situation of other brands is similar. One-stop solution.





How to replace the sealing ring of the cylinder?
The main steps and contents of replacing the sealing ring of the cylinder are: first clean the surface of the cylinder, and then disassemble the cylinder, but it must be done in the prescribed order and cannot be reversed. After removing the various sealing rings, conduct corresponding inspections and clean the cylinder head, etc. at the same time. Apply grease to the new sealing ring to lubricate it, and then install it in order so that the new sealing ring can achieve a good sealing effect.



When using the inlet O-ring, the operation quality of the installation process directly determines whether the sealing state is stable, and it also has a huge impact on the service life of the inlet O-ring. In addition, leakage problems that occur during later use are often caused by imperfect installation operations, which can easily cause damage to O-ring products. Although imported O-ring components can be replaced while the equipment is running, if the damaged sealing components are not replaced in time, it will cause great production losses and may even cause damage to the production equipment.





Therefore, SMC cylinders must pay attention to every detail during the installation process, especially scratches and damage must be adjusted in time. No mistakes are allowed during the installation operation. Although the imported O-ring itself has high elasticity and deformation strength, incorrect installation will still cause great damage to the sealing components. Problems such as scratched sealing rings or distortion caused by careless installation are typical safety hazards.

Before installing the SMC cylinder, the sealing groove and mating surface must be thoroughly cleaned to remove all impurities. If there are cracks or scratches, intact parts should be replaced in time. At the same time, apply grease evenly on the surface of the O-ring to ensure the integrity of the equipment during use.

In addition, in order to prevent the imported O-ring from being scratched by sharp objects during installation operations, a certain lead-in angle is left at the installation shaft end and hole section to ensure that the sealing ring can be successfully installed in a fixed position. If a section of thread needs to be passed during installation, a special metal guide bush must be used for the operation. In addition, when passing through the incision, more attention must be paid to keeping the O-ring from contacting sharp parts. Normal operation can only be guaranteed when it is intact.


SMC cylinder sealing rings are mainly used for sealing pneumatic systems. In fact, we know that cylinder sealing ring standards can be divided into many types according to the cross-section of the sealing ring. Here is a different introduction. Cylinder sealing rings are important in solving the leakage problem of pneumatic systems. effective measures. If the sealing ring of the hydraulic system is poor, the cylinder sealing ring may leak out, and the leaked oil will pollute the environment;it may also cause air to enter the oil suction chamber, affecting the working performance of the air pressure pump and the smoothness of the movement of the air pressure actuator. . Therefore, the reasonable selection and design of sealing ring devices is very important in the design of pneumatic systems.

But as for what rubber O-rings are, I believe many people, like the editor, are confused. After studying, the editor has compiled the following information, please take a look.





1. Brief description
The SMC cylinder is a rubber ring with a circular cross-section. Because its cross-section is O-shaped, it is called a rubber O-ring. It is the most widely used type of hydraulic and pneumatic transmission systems.


The SMC cylinder is an annular rubber seal with a circular cross-section, which is mainly used to prevent the leakage of liquid and gaseous media in mechanical components under static conditions. In some cases, O-rings can also be used as dynamic sealing elements for axial reciprocating motion and low-speed rotation. According to different conditions, different materials can be selected to suit them.
When selecting SMC cylinders, large-section O-rings should be used as much as possible. Under the same gap, the volume of the O-type sealing ring squeezed into the gap should be smaller than the maximum allowable size.


SMC cylinder is a commonly used sealing form in fluid power systems. It works well in many fluid power systems, but it must be used cautiously and carefully. O-rings can only function when they are deformed. The O-ring is shaped like an O-ring. It is installed in the sealing groove and then pressed tightly so that there is no gap in the sealing groove, thus sealing the liquid or air flow. Although this simple sealing structure works well in fluid power systems, good sealing can only be achieved with careful design, careful selection, and proper installation.



2. Causes and countermeasures for rubber O-ring failure
(1) Installation damage
lose