Silicone sealing ring waterproof principle

The silicone waterproof sealing ring is known for its good waterproof performance, but the resistance to water vapor is not good, and the pressure is more than 50 pa. Compatible with most oils, chemicals and solvents. General silicone rubber good acid and alkali resistance, polar solvent resistance is acceptable, not resistant to alkane hydrogen and aromatic oil products. It is not recommended for use in most concentrated solvents, concentrated acids, oils, and diluted caustic soda solutions. Special silicone rubber also has radiation resistance, fire resistance, oil resistance and other properties. It has low tensile strength and weak wear resistance, and is generally not used for dynamic sealing.

Waterproof seal ring is the most commonly used seal in hydraulic cylinder, it is a typical lip seal, whether used for piston or piston rod can obtain a good sealing effect, U-ring in low pressure, only rely on the interference deformation of the lip to produce a seal, due to small contact area, friction force is relatively low, as the pressure rises, the lip elastic deformation increases, stretching, stretching, etc. With the increase of compression and bending stress, the radial compression force of the U-ring automatically increases, and the length of contact with the sealing surface continues to increase, until the entire axial length of the U-ring contacts the sealing surface, so as to ensure good sealing under high pressure.

Silicone waterproof sealing ring is a new type of sealing environmental protection products, the introduction of advanced technology in the same industry in developed countries and silica gel as raw materials, advanced vulcanization process made of silicone waterproof sealing ring, excellent quality, stable performance, favored by domestic industry users. Delong Xingye waterproof sealing ring, fresh-keeping box sealing ring, water cup waterproof sealing ring and other products are typical of this kind of products, the design makes the sealing ring close to the inner slot, sealed well, effectively prevent water leakage, dust, air and so on.