Application of Flexible Graphite in High Temperature Melt Pump

Flexible graphite is a familiar sealing material. So, can it be used for high temperature melt pump shaft seal? If so, why is it not common in practice? Zhengzhou Bate Melt Pump Manufacturer will analyze and discuss the above situation.
 

According to various data, flexible graphite has the advantages of high temperature resistance, corrosion resistance, good self-lubrication and relatively high compression resistance. This may be an ideal material for high temperature melt pumps. However, up to now, there are still many people who do not know enough about the application scope of flexible graphite. It is generally believed that flexible stone is commonly used for static sealing points, but also for semi-dynamic sealing points like valves. If it is used for dynamic sealing points, because of mechanical friction, flexible graphite will be destroyed quickly, because it is brittle, and the loaded flexible graphite is in the packing box. It is fragmented or granular. Therefore, in some important sealing occasions, especially in dynamic sealing occasions, we dare not use flexible graphite rashly. So, if we really use flexible graphite to do experiments on high temperature melt pumps, will there be adverse consequences?

First, it is necessary to analyze the feasibility of doing so. Some advantages of flexible graphite are just the shortcomings of other materials, but the plasticity is poor. Because of the good self-lubrication of flexible graphite, the mechanical friction will not be very large, and the filler will not be damaged quickly. Flexible graphite may be damaged quickly if it is rubbed by high-speed running machinery. But high temperature melt pumps are generally slow-running equipment. The compressive strength is greater than that of the other two materials, and the extrusion time by high pressure melt and capping can also be prolonged.