​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Chesterton 1830 is an advanced, expanded, graphite PTFE packing made up of filaments developed to meet rigid specifications. It is well-suited for use in pumps, valves, agitators, mixers, and other rotating equipment. The PTFE resin is combined with graphite and expanded by using the latest technologies, resulting in a high-quality filament.​​