The O-shaped
seal is made of nitrile
rubber, silica gel, fluoroplastic material, and a dynamic seal (piston seal, piston rod seal) and a static seal (axial seal) for hydraulic pneumatic elements. It is a wide seal in hydraulic engineering (limited to low speed rotary sealing).
Seal manufacturer product
The O-ring is a sealing ring mounted in a trench and an appropriate amount of compressed O-section. The O-ring is formed in the mold, and its size is commonly defined by the inner diameter and cross-section diameter.