A Die-formed Ring is a graphite ring with a special low friction coating. This helps ensure maximum service life. The coating is sinter-bonded to the graphite prior to the moulding process. It also prevents the fine leak paths between the packing fibers.

These rings are used in valve stems to provide a leak free seal. They can be manufactured in various styles and materials to meet your application requirements. Some common types of graphite ring are flexible, wedge and profiled. Wedge shaped rings are ideal for sealing applications involving high pressures. Profiled graphite rings have better compression performance.

These rings are commonly used in valves for dry gases and other fluids. They are primarily made of low sulphur expanded graphite, and are generally square cross section. Graphite die formed moulded rings are useful for valves with high friction. Because they have exceptional low friction, they can greatly reduce the torque required for effective valve action.

These rings are designed for long life and can be used in the presence of high temperatures. Typically, they are used in self-sealing gaskets in high pressure valves. However, they can also be used in other applications.The use of Die-formed Ring Sets is beneficial because they minimize installation and replacement costs. They are easier to install and remove, as there is no need to remove the valve drive.