Silicon Carbide Seal Rings are hard and boast excellent abrasion resistance, making them an excellent choice for many applications. In addition, their low coefficient of friction provides reduced drag while their chemical stability ensures stability over time. Reaction-bonded silicon carbide is the go-to material for mechanical seals, offering improved thermal shock and abrasion resistance over traditional sintered grades.
High Strength
Silicon carbide outshines carbon graphite when it comes to handling extreme speeds and pressures while being less vulnerable to thermal shock, being both hard and resistant to mechanical shock damage. Furthermore, its high strength also enables it to withstand temperatures in nuclear power plants reaching up to one hundred degrees Fahrenheit.
low coefficient of friction of Silicon Carbide Seal Rings allow them to conserve energy and prevent heat from escaping the system, improving efficiency. Furthermore, a Silicon Carbide seal ring has lower expansion rate compared to Tungsten Carbide seals, making it less susceptible to distortion.
Silicon Carbide, an inert material made up of crystals, is known for being hard and offering exceptional abrasion resistance. Furthermore, this hard and inert substance makes an excellent mating ring material in oil refineries with aggressive fluids such as water.
Instead of being limited to acid and alkali applications and vulnerable against oxidation, SiC ceramic is highly corrosion-resistant and stands up well to extreme temperatures and abrasion – which make it an excellent choice for sealing equipment used in mining operations as well as oil and gas processing facilities where radiation, high temperatures, and aggressive coolants may exist. This makes SiC an excellent material choice.
Low Coefficient of Friction
Silicon Carbide boasts an extremely low coefficient of friction compared to both Alumina Ceramic and Tungsten Carbide, making seals last longer and reducing wear that could otherwise lead to catastrophic equipment failure. Furthermore, this material’s highly corrosion resistant nature makes it perfect for environments containing chemicals.
Low coefficient of friction makes this material suitable for dynamic seals, as it reduces energy lost through friction between mating rings – which in turn translates into significant savings on production costs as well as maintenance expenses for equipment.
An experimental design using the Taguchi method was carried out to examine the effect of design factors on dynamic friction coefficient and wear in a carbon primary ring-silicon carbide mating tribological couple, using normal load, surroundings, mating ring finishing and rotational frequency as factors to analyze dynamic friction coefficient and wear rates of studied seal pair. Results demonstrated that each of these influences have different impacts on dynamic friction coefficient and wear rates of studied seal pair.
High Resistance to Corrosion
Silicon carbide stands out on the Mohs scale with an incredible hardness rating of 9 out of 10, making it difficult to damage. This extraordinary strength allows mechanical seals to withstand high pressure, high speeds, extreme temperatures and abrasive media without failure or repairs being necessary; furthermore it helps resist chemical corrosion to minimize costly downtime caused by failures or repairs.
Reaction bonded silicon carbide (RB-SiC) is an economical choice that offers excellent wear and corrosion properties. Produced by bonding porous carbon profiles to molten silicon then sintering into monolithic SiC, RB-SiC contains small amounts of free silicon for increased abrasion and corrosion resistance and should only be used in environments without strong acids or alkalis present.
Sintered silicon carbide is an economical choice for high-pressure, high-speed applications. Its benefits include superior wear, corrosion and thermal performance as well as decreased cost compared to tungsten; however it isn’t as tough, so a seal should be designed using hard face materials suitable for your application.
Graphite-loaded silicon carbide (G-SiC) mating rings provide another excellent choice for mating rings intended to complement carbon-graphite primary rings in challenging service conditions, thanks to their superior strength, low friction, and corrosion resistance properties. Their durability helps avoid catastrophic failures reducing warranty claims and repair costs significantly. Graphite-loaded SiC is often recommended in hydrocarbon process applications as well as applications involving vibration or mechanical shock.
Long Life
Silicon Carbide Seal Rings provide excellent wear resistance over an extended lifespan, are strong, corrosion resistant, and suitable for harsh environments such as mines. Unfortunately, however, unlike their tungsten carbide counterparts they may break when thermally shocked or exposed to sudden and significant temperature changes, requiring constant monitoring or replacement in such instances. Atmospheric pressure sintered silicon carbide is a high-density alpha-silicon carbide material formed through molding and sintered at high temperatures to form a monolithic element. Boron and carbon additives may be added as sintering aids to increase density and strength; reaction bonded sic is similar but uses graphite instead of free carbon; both materials have excellent tribological behavior when used as mating faces with carbon graphite or alumina material mating surfaces, while special carbon grades exist for applications like hydrofluoric acid environments or extreme chemical conditions such as hydrofluoric acid environments. Silicon Carbide Seal Rings are highly resilient and suitable for harsh environments like oil or gas without risk of damage, as well as mechanical shocks. Junty offers these seals in various shapes and sizes to meet all of your sealing needs.