Applications involving high temperatures are challenging for many gasket materials. Non-graphite gasket materials, such as Nitrile, Silicone, PTFE, and others, will only support temperatures up to a certain level. For example, Nitrile gaskets will service application temperatures up to about 95°C, while Silicone and PTFE will service application temperatures up to 200°C and 260°C respectively. For applications involving temperatures higher than these, graphite gaskets are the preferred choice.
Graphite, a form of carbon, is an inert material which resists chemical attack even at high temperatures. Because it is an inert material, it has a low propensity to react with, or contaminate, other substances. Graphite also has a low coefficient of friction which is useful when being used to seal joints – gasket made from graphite sheet easily accommodate to loading forces as flange faces are tightened.
Graphite sheet used to produce gaskets will support high temperatures. Typical temperature ranges include -240°C to 510°C in an oxidizing atmosphere, and pressures up to 2000 psi. High-purity graphite sheet can become brittle and for this reason, the high-purity sheet is often reinforced with metal core inserts to provide additional strength and stability.
CRG offers graphite gaskets cut from a range of graphite sheets. These include the following:
CRGI has over 30 years of experience in manufacturing precision-cut flexible graphite gaskets for industrial fluid sealing applications. All gaskets we manufacture are produced to customer specifications and requirements using the latest manufacturing processes, including water jet cutting, flex/flash cutting, and die cutting. If required, we can supply gaskets from flexible graphite sheet with or without pressure sensitive adhesive (PSA) backing. For further information on the flexible graphite gaskets we can supply, please contact our sales department at email@example.com.