Classification and performance characteristics of fastener gaskets

During the use of fasteners, in order to seal between mechanical parts, we will use gaskets to seal, which can also prevent leakage between two objects due to pressure, corrosion, and natural thermal expansion and contraction of the pipeline. In daily life, our common gaskets have the following types, and their performance characteristics are different according to different types.

1. High, middle and low pressure asbestos rubber sheet gasket

Asbestos rubber gaskets are made of asbestos fibers and rubber as the main raw materials, supplemented by rubber compounding agents and fillers, through mixing and stirring, hot roll forming, vulcanization and other processes. Asbestos rubber gaskets can be divided into ordinary asbestos rubber gaskets and oil-resistant asbestos rubber gaskets according to their different formulations, technological properties and uses. According to the temperature and pressure used, it can be divided into low pressure asbestos rubber gasket, medium pressure asbestos rubber gasket and high pressure asbestos rubber gasket. It is suitable for the sealing of water, steam, oil, solvent, medium acid and alkali. Asbestos gaskets are mainly used in the sealing of medium and low pressure flange connections.

2. Oil-resistant asbestos rubber gasket

Performance characteristics: Oil-resistant asbestos rubber gaskets are refined from high-quality asbestos fibers, oil-resistant fibers, fillers, colorants, etc., and are widely used in pipelines and equipment in the petroleum and chemical industries. The corresponding grade can be selected according to the working conditions. Model.

Application: Oil-resistant asbestos gasket: mainly used for steam, hydraulic, gas, oil solvent and non-corrosive medium sealing. (Guide: Knowledge of Fastener Burr Treatment)

3. Cylinder gasket

Performance characteristics: Cylinder gaskets are refined from high-quality asbestos fibers, oil-resistant fibers, fillers, colorants, etc., and are widely used in automobiles. Motorcycle engine cylinders can be selected according to the working conditions.

4. Aramid gasket

Performance characteristics: Aramid gaskets, steam, organic solvents, acids, alkalis, etc., are widely used in the sealing of pumps, valves, pipes, containers, etc. used in fluid transportation equipment.

Composition and characteristics: A sealing product made of high-strength, high-abrasive aramid fiber as the main material and special materials with good lubricity. This sealing product has excellent lubricity and wear resistance. It can show its outstanding features on liquid devices that mix solid and liquid phases.

5. Non-asbestos sheet gasket

Non-asbestos gaskets (non-asbestos gaskets) are sealing materials made of aramid and other organic fibers and plant fibers, nitrile rubber, and inorganic minerals at high temperatures. Since they contain few asbestos fibers, they are suitable for Asbestos gasket is an alternative to asbestos gasket. Non-asbestos gaskets (non-asbestos gaskets) not only have high strength, but also have good resilience, and at the same time have super resistance to permeability. It is a good environmentally friendly material to replace asbestos gaskets under high temperature and high pressure.

6, asbestos mat

Compression molding with asbestos cloth and other auxiliary materials, used for corrosive high pressure and high temperature sealing. Used in reaction kettles, reaction tanks, manholes, hand holes, etc. Operating temperature: -100℃+1000℃; Operating pressure: PN<5.0Mp;

7. Rubber pad

A kind of vinylidene fluoride and fluorine-free, propylene fluoride, propylene material copolymer colloidal elastomer, widely used in the defense industry and civil industry, its characteristics are: high temperature resistance, ozone resistance, natural aging resistance, vacuum resistance, resistance Fuel oil, lubricating oil resistance, strong oxidant resistance, chemical resistance and electrical insulation properties are good.

8. Teflon lining rubber pad

PTFE lined rubber gasket is a tetrafluoroethylene sandwich rubber composite gasket. With strong anti-corrosion performance and high sealing resilience, it is suitable for anti-corrosion sealing of low-pressure chemical equipment such as enamel and glass pipelines.

9. Non-asbestos gasket

According to its formula, process performance and use, non-asbestos gaskets are roughly divided into non-asbestos rubber sheet gaskets and non-asbestos copy board gaskets. They are all made of aramid and other organic fibers and plant fibers, Dingqing The non-asbestos gasket series made of rubber and minerals through the rolling or copying process, because the non-asbestos gasket series not only has high strength, but also has good resilience, and at the same time has super resistance Permeability, so they are excellent environmentally friendly sealing gaskets to replace asbestos gaskets in the automotive and industrial machinery fields.

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