PTFE gasket commonly known as Teflon gasket. It has the characteristics of corrosion resistance, aging resistance, low friction coefficient, non stick, high temperature resistance, and good elasticity. It is very suitable for manufacturing sealing components with high corrosion resistance requirements and operating temperatures above 100 ℃, such as machinery, heat exchangers, high-pressure vessels, large diameter vessels, valves and pumps, glass reaction tanks, flat flanges, etc. The sealing performance of PTFE gaskets will have a significant impact on the efficiency and performance of the entire equipment. So, do you know which factors will affect the performance of PTFE gaskets?

The factors that affect PTFE gaskets are as follows:

1. Different materials result in different sealing properties of PTFE gaskets. Soft plastic raw materials are easy to cause ductility or plastic deformation under the action of torque, which is conducive to sealing, thus blocking the running channel of fluid leakage, which is conducive to sealing. However, soft plastic raw materials cannot withstand the impact of high pressure Fluid mechanics, and the corrosion resistance, temperature resistance and relative density of gasket materials will affect the sealing of PTFE gaskets.

2. Medium to be sealed: The temperature of the medium directly affects the sealing performance of the PTFE gasket. In order to achieve better sealing effect, it is necessary to choose the material for the sealing gasket based on the actual temperature, pressure, pH value, acidity, and alkalinity of the sealing medium, such as the sealant-BD 7701 PTFE gas sealing material.

3. Condition of sealing surface. The shape and roughness of the sealing surface have a certain impact on the sealing performance, and a smooth surface is beneficial for sealing. Soft pads, such as PTFE gaskets, asbestos free gaskets, and asbestos free gaskets, have little effect on sealing performance due to their easy deformation characteristics; For hard gaskets, their surface condition has a significant impact on sealing performance. The larger the contact width between the sealing surface and the gasket, the better the sealing effect. However, under the same compression force, the larger the contact width, the smaller the sealing pressure. Therefore, when selecting sealing materials, the selection should be based on the actual situation.

4. Temperature at the location of use. The location of use will also have an impact on the sealing of the PTFE gasket, with temperature changes being more significant, which will directly affect the sealing performance of the gasket and lead to leakage.

     5. External factors, such as vibration of pipeline system software, deformation of connecting components, and deviation of installation position, are all reasons for the additional force of hydraulic sealing, which can have adverse effects on the sealing. Especially during vibration, the clamping force between protruding surfaces can cause regular changes, causing the connecting foot bolts to loosen and leading to seal failure. Vibration is caused by external factors and also by hydrodynamic flow within the system software.