The material of the PTFE bar gasket: the soft material is easy to produce elastic or plastic deformation under the pre-tightening force, thereby blocking the passage of the fluid leakage, thus facilitating the sealing; but the soft material generally cannot withstand the high pressure fluid. effect. The corrosion resistance, heat resistance, and density of the gasket material have a certain influence on the sealing.

The temperature of the PTFE rod is sealed. The temperature of the medium fluid directly affects the sealing performance of the gasket. Therefore, the material must be equal to or higher than the temperature of the field. In addition, the temperature change will directly affect the gasket. The sealing performance causes a leak.

Teflon rod medium fluid: The function of the seal is to seal the medium and prevent leakage. In order to better seal the solution, the temperature, pressure, PH value and corrosivity of the medium must be taken into consideration.

The size of the sealing surface of the Teflon rod: the larger the contact width between the gasket and the sealing surface, the longer the path through which the medium fluid leaks is required, but under the same pressing force, the larger the contact width, the sealing ratio The pressure will decrease. Therefore, it is necessary to find a suitable contact width according to the material of the seal.

The shape and surface roughness of the sealing surface have a certain influence on the sealing property, and the smooth surface is favorable for sealing. Soft gaskets are insensitive to surface conditions due to their ease of deformation, while surface conditions are extremely influential for hard gaskets. The greater the contact width of the sealing surface with the gasket or packing, the longer the path through which the fluid leaks is required, and the greater the flow resistance loss, thus facilitating sealing. However, under the same pressing force, the larger the contact width, the smaller the sealing specific pressure will be. Therefore, Dongguan Teflon rotary seal manufacturers should seek suitable contact width according to the material of the seal.