PTFE packing vs graphite packing

Material Differences

1. Graphite packing: Graphite packing is made of natural graphite and contains no fibers. It is stable and hard, with excellent chemical resistance and high-temperature resistance.

2. PTFE packing: PTFE packing is made of polytetrafluoroethylene and has high chemical stability and corrosion resistance, but is slightly inferior to graphite in this regard.

Temperature Resistance Differences

1. Graphite packing: Graphite packing can be used in high-temperature environments, with a maximum operating temperature of up to 450°C.

2. PTFE packing: PTFE packing can be used in both low and high-temperature environments and can be normally used within the range of -200°C to +250°C.

Corrosion Resistance Differences

1. Graphite packing: Graphite packing has good corrosion resistance and remains stable under the corrosive effects of acids, alkalis, and other chemicals.

2. PTFE packing: PTFE packing has excellent corrosion resistance in strong acids, strong alkalis, and other solvents, making it suitable for use in corrosive environments.

Application Differences

1. Graphite packing: Graphite packing is suitable for sealing high-temperature and high-pressure gases or fluids and is commonly used in industries such as chemical engineering, oil refining, power, aviation, and nuclear energy.

2. PTFE packing: PTFE packing is widely used in industries such as chemical engineering, food, medicine, electronics, light industry, petroleum, pharmaceuticals, and electronics. It is particularly in high demand in the fields of fluorine chemical engineering and biotechnology.

[Conclusion] Graphite packing and PTFE packing, as pipe sealing elements, each have their own characteristics and advantages. The appropriate product should be selected based on actual usage requirements.