Seal manufacturers believe that O-rings are made of nitrile rubber, silicone, and fluorine rubber, and are used for dynamic seals (piston seals, piston rod seals) and static seals (axial seals) of hydraulic and pneumatic components. It is one of the most widely used seals in hydraulic engineering (limited to low-speed rotary seals).
The O-ring is a sealing ring with an O-shaped cross-section installed in the groove and compressed by an appropriate amount. The O-ring of Hengshui Hi-Tech Rubber and Plastic Products Co., Ltd. is vulcanized and formed in the mold, and its size is usually defined by its inner diameter and section diameter.
O-rings have many advantages over other sealing elements:
1. Small structure, easy to assemble and disassemble
2. Low price and small size.
3. A large number of standard sizes are available in stock worldwide, which is convenient for maintenance and repair.
The seal manufacturer recommends that the main content of the O-ring seal design is the compression ratio and tension of the section diameter, which is of great significance to the sealing performance and service life. In order for the O-ring to form a good sealing effect, it is necessary to form a reasonable amount of compression and tension of the sealing ring, so the correct matching of the size of the O-ring and the size of the groove becomes an important factor.
When designing and processing the sealing device, if the O-ring compression amount is too large, the O-ring rubber stress will relax and cause leakage; if the compression amount is too small, it will cause leakage. Similarly, excessive stretching of the O-ring during operation will also accelerate aging and cause leakage. Standards all over the world have stricter regulations on this.