Application Considerations for Carbon Graphite Mechanical Seal Faces
Carbon graphite seal faces have the common advantages of metal materials and non-metal materials. The material characteristics of carbon graphite seal faces are excellent self-lubrication, chemical stability, high thermal conductivity, high temperature resistance, corrosion resistance, high wear resistance, low expansion, and easy processing. These characteristics of carbon graphite are exactly necessary for pure water hydraulic sealing materials. So carbon graphite seal faces are essential sealing elements in pure water hydraulic systems:
Performance Analysis of Carbon Graphite Mechanical Seal Faces:
1. Thermal properties of materials: The carbon graphite material used in Carbon Graphite Mechanical Seal Faces has high thermal conductivity and low expansion. Its thermal conductivity is second only to aluminum and steel, and it is the only material with high thermal conductivity among non-metallic materials. It can effectively keep the sealing surface in shape and avoid the problem of medium leakage caused by thermal deformation.
2. Chemical properties of the material: The carbon graphite material used in Carbon Graphite Mechanical Seal Faces is an inert material with high temperature and non-toxic chemical properties. It has strong chemical stability and good corrosion resistance in the air at 400 degrees Celsius;
3. Mechanical properties of the material: The carbon graphite material used in carbon graphite seal faces is a brittle material with high compressive strength, low tensile strength and shear strength, and poor impact resistance, but it can be processed into any Complicated shapes with good machinability.
4. The water solubility and lubricity of the material: the carbon graphite material used in carbon graphite seal faces has a small friction coefficient and excellent self-lubricating performance. The lubricator of graphite is even better under the conditions of other media. The lubricity can be better exerted under the condition of water and air, because the presence of water and air is the adsorption of water and gas molecules on the working surface of graphite, which increases the distance between the cleavage planes that slide each other and weakens the binding force between them. .
In addition: graphite material also has a characteristic that it has strong adhesion with most metal materials, so graphite is easy to form a layer of graphite film on the friction pair of grinding metal materials, resulting in the friction between graphite and graphite. , thereby greatly reducing the friction factor and wear.
The above are some common application knowledge of carbon graphite seal faces. For seals made of carbon graphite materials, if you have a clear understanding of its material properties, you can safely apply the seals to them.