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How to choose the specifications of PTFE gasket?
Oct 18, 2018

PTFE gaskets are called PTFE gaskets, and foreign countries are also called PTFE gaskets or gaskets. Flat gaskets, V-shaped gaskets, piston rings, ball valve gaskets, etc., which are mechanically turned or cut from Teflon rods, tubes and plates, have good corrosion resistance, anti-aging and non-conductivity. The pH of polytetrafluoroethylene is 0-14 (except for molten alkali metal and high temperature, fluorine under high pressure). The gasket can have good mechanical strength between -100 ° C and 100 ° C.


Introduction of different PTFE gaskets


Pure PTFE gasket:


In addition to the introduction at the beginning, it should also be noted that when the temperature is below -185 °C, the Teflon gasket will become brittle. The pure Teflon gasket is a clean sealing product that will not be in contact with it. Any substance that forms pollution can be widely used in food, medicine and other industries.


Graphite filled PTFE gasket:


Graphite-filled PTFE gaskets, also known as graphite-reinforced PTFE gaskets or black PTFE gaskets, are a unique material with unique operating characteristics for excellent compressibility, recovery and sealing. Its unique properties and advanced properties exhibit sealing and torque retention, overcoming the shortcomings of conventional PTFE in cold flow and creep properties of materials, while maintaining better bolt loading than conventional PTFE. This not only improves the durability of the seal, but also reduces the maintenance of the graphite. The advantages of graphite filling and filling of the PTFE gasket are: low friction coefficient, good compressive strength and improved wear resistance, which makes its use greatly exceed the traditional PTFE. This improves both the environment and the cost, and is suitable for chemical, petrochemical, hydrocarbon reactions and power plants.


Glass fiber filled PTFE gasket:


Also known as glass fiber reinforced PTFE gasket, it is a special material with unique operating characteristics. It has excellent compressibility, recovery and sealing. Its unique properties and advanced properties show tightness and torque retention. The cold flow and the creep properties of the material overcome the shortcomings of conventional PTFE, and it maintains the bolt load better than conventional PTFE, which improves the durability of the seal and reduces the maintenance of the flange.


Glass fiber filled PTFE gasket Advantages: Improve wear resistance and chemical resistance, making it use much more than traditional PTFE, which not only improves the environment but also saves costs for chemical, petrochemical, hydrocarbon reaction and power plants. It is especially suitable for food, pulp, paper, pharmaceutical industry and other places where it is not allowed to pollute the environment.


Expanded PTFE gasket:


Expanded PTFE gaskets are truly advanced and unique materials. It has anti-creep, anti-cold flow, ultra-low temperature resistance, no pollution, and easy to install and replace. Under a small preload, even under pressure fluctuations, it can withstand considerable internal pressure, which is very suitable for rough or wear-resistant and fragile glass surface flanges, temperature alternating sealing occasions.