Hexoloy Mechanical Seal Face Introduction
Hexoloy®SiC... Your Mechanical Seal Face Material Solution
Saint-Gobain Ceramics offers a family of Hexoloy sintered alpha silicon carbide grades, providing high performance seal face materials that have proven successful in such diverse applications as automotive water pumps, chemical processing, refining, mining, pulp and paper processing, mixers, and refrigeration.
No other commercially available seal material offers the performance package Hexoloy SiC provides.
The advantages of Hexoloy SiC include:
Whether the application involves exposure to corrosive environments, abrasives, high temperatures and pressures, or high speeds, Hexoloy sintered alpha silicon carbide will outperform other hard face materials including fine-grained, reaction bonded SiC and tungsten carbide.
There's a Hexoloy® SiC Material for your application
Hexoloy SA Silicon Carbide
Hexoloy SA SiC is a pressureless, sintered form of alpha silicon carbide, with a density greater than 98 percent theoretical. It has a very fine grain structure (less than 10 µm) for excellent wear resistance and contains no free silicon, which makes it highly chemically resistant in both oxidizing and reducing environments. The combination of fine grain structure and universal corrosion resistance results in a hard face material with excellent performance in a wide range of applications.
Hexoloy SP Silicon Carbide
Hexoloy SP SiC is a sintered alpha silicon carbide material designed specifically for optimum performance in sliding contact applications such as pump seal faces. This material improves upon the exceptional corrosion and erosion resisting properties of Hexoloy SA SiC through the addition of unique spherical pores. These discrete, evenly dispersed pores act as fluid or lubricant reservoirs helping to promote the retention of a fluid film at the interface of sliding component surfaces. (Reference Hexoloy SP SiC performance charts)
Hexoloy SP SiC Performance
Corrosion Test Results in Liquids
Noralide® NBD-200 Hot Pressed Silicon Nitride
Noralide® NBD-200 Hot Pressed Silicon Nitride (Si3N4) offers a combination of characteristics that make it an ideal material for mechanical seal face components as well as for other applications where maximum fracture toughness and flexural strength are required. Hot-pressed for maximum strength and density, Noralide� Si3N4 provides better fracture resistance than other ceramic materials. It can easily be machined in a variety of shapes and worked to close tolerances.
Compare Hexoloy® SiC to Other Common Seal Face Materials
Testing shows that Hexoloy SiC outperforms other common seal face materials in properties such as hardness, thermal conductivity and specific strength.
Some examples of how Hexoloy SiC solves application requirements
Automotive Water Pumps - Because of greater resistance to both wear and thermal shock, Hexoloy SiC has replaced aluminum oxide as the material of choice for automotive water pump seal faces, one of the most challenging hard-on-hard applications. Over 90 million units are sold annually to meet the demands of global automakers.
Chemical Processing - Hexoloy SiC provides a universal solution for many applications in the chemical processing industry where corrosion resistance and high temperature resistance are critical in such demanding environments.
Oil Refineries - Hexoloy SP is the ideal solution for oil refinery applications where limited lubrication situations occur. Hexoloy SP provides exceptional low friction properties while retaining univeral corrosion resistance.
Industrial Applications - Net shape moldable Hexoloy SiC offers a high performance, cost-effective seal face solution for high volume general purpose industrial pump seals.
Special Applications - Hexoloy SiC can be applied in critical seal face applications such as high speed compressors and nuclear reactor cooling water pumps.
Your Applications - Contact Saint-Gobain Ceramics engineers to assist you in the design of a seal face solution for your seal needs.
Hexoloy SiC the way you need it
Saint-Gobain Ceramics, Structural Ceramics, supplies both Hexoloy SA and Hexoloy SP as:
Your Source for Cost-Effective Hexoloy SiC...Worldwide
Saint-Gobain Ceramics offers vast resources to meet your needs for silicon carbide products. With representation in Asia by Norton KK (a Saint-Gobain company) and locations in Europe, Australia and South America, we can deliver your solution when you need it, where need you need it, in virtually every corner of the world.
*Composition code: Si = free silicon metal;
C = free graphite; SiC = silicon carbide;
N = nitrogen; Si3N4 = silicon nitride
***RT to 1000°C
****Dependent upon dopants in Hexoloy®SA
SiC which will decrease electrical resistivity
**Test Bar Size: 3 x 4 x 45 mm
(0.118" x 0.157" x 1.772")
We supply Hexoloy SiC:
- Finished components
- Unfinished tubes and machined blanks - See PDF
- Pressed near net shape blanks
- High volume pressed net shape components
- Complex, highly machined parts