WSC Mechanical Seals
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"The Mechanical Seal Experts"
Mechanical Seal Stationary & Rotary Seal Face Materials
Selecting the proper mechanical seal face material combination is crucial in providing every mechanical seal a prolonged seal life & eliminating any chances of a premature seal failure.  WSC Mechanical Seals offers an extensive variety of mechanical seal face materials and gladly offers experienced advice of which mechanical seal face materials are best suited for your exact operating conditions.
Tungsten Carbide
Tungsten Carbide is a versatile seal face material.  It is a hard material & heavy to the touch, making it easy to distinguish from other materials.  Tungsten Carbide is ideal for high pressure applications with little face distortion.  It is also applied into extreme debris mechanical seal enviroments. With its dense construction characteristics, Tungsten Carbide will not break or crack under these severe conditions.
Silicon Carbide
Silicon Carbide is a versatile seal face material like Tungsten Carbide.  It is a hard material & light to the touch, with a bluish color.  Silicon Carbide has much better lubrication qualities than most mechanical seal face materials. Alpha Sintered Silicon Carbide is most common & suited for chemical applications, as well as higher temperature sealing enviroments.  Silicon Carbide is a hard material, but unlike Tungsten Carbide, it will shatter/crack if contacted with force or dropped.
Ceramic is a versatile seal face material, that is generally inexpensive.  It is a hard material & light to the touch, with a white color.  Ceramic offers excellent wear characteristics & chemical compatibility. Unlike other mechanical seal face materials though, it cannot handle thermal shocks.  Ceramic retains heat when equipment is not operating, and general startup procedures can easily crack this seal face material.  Ceramic, like Silicon Carbide, will shatter/crack if contacted with force or dropped.
Carbon Graphite is a self-lubricating mechanical seal face material, generally used as a mechanical seal rotating face.  Our standard grade of carbon used is CNFJ.  It has superior wear characteristics with a broad chemical resistance.  For severe applications, Antimony Filled Carbon can be applied to assist with any mechanical seal face issues.  Carbon is light to the touch & black in color.
Ni-Resist is a form of cast iron with a high nickel content to lower the friction generated by the mechanical seal's rotating face.  It is typically an inexpensive mechanical seal face material that can substitute for Tungsten Carbide.  Ni-Resist shows signs of wear earlier than Carbide seal faces, but is ideal for Rotary Vane/Screw Gas Compressors or Oil applications.  If installed into a water application, Ni-Resist will show signs of corrision.