Highlights of Silicon Carbide Seal Ring
Compared to traditional materials like metal or graphite, silicon carbide seal rings are a lightweight ceramic with exceptional hardness comparable to diamond but much lower in density. SiC ceramics feature excellent thermal conductivity, high mechanical strength, low thermal expansion, outstanding chemical resistance, and superior thermal shock resistance.
Because of these advantages, silicon carbide seal rings are widely used in various fields: Chemical processing equipment, Fluid handling systems, Energy and power generation, Food manufacturing machinery, Gas production units, Precision machining tools, Pumping systems, Slurry and abrasive material handling, Water treatment facilities.
Wide Types for Silicon Carbide Seal Ring
Silicon carbide seal rings are an efficient material for applications where high wear and corrosion resistance are required.
Silicon Carbide Stationary RingCooperate with the dynamic ring to form a sealing surface.
Silicon Carbide Rotary Seal RingUsed on the rotating shaft, fits in with the sealing surface of the static ring.
Silicon Carbide Ceramic Flat SealSuitable for most of stable working conditions.
Silicon Carbide Mechanical SealHigh wear resistance, corrosion resistance, good sealing.
Good wear resistance and self-lubrication, reduce friction coefficient and energy loss.
Silicon Carbide PlungerHigh surface finish along with good sealing. Effectively prevent medium leakage.
Features and Applications of Silicon Carbide Seal Ring
Silicon carbide seal ring is mainly used in various high-precision machinery, for high temperature resistance, corrosion resistance, oxidation resistance, and wear resistance.
Mohs hardness >9, Vickers hardness >2500 HV, providing excellent hardness and wear resistance.
Lighter than metal rings, suitable for high-speed rotating parts. Durable and not increase the mechanical load.
Resistant to strong acids & alkalis (except hydrofluoric acid) and high temperature oxidation (up to 1600℃).
Bending strength 400 MPa, better for compression and impact resistance.
Why Choose Newthink Silicon Carbide Seal Ring?
Escolhendo NEWTHINK silicon carbide seal ring can provide you with long service life, low-maintenance solutions, helping to ensure stable operation under harsh working conditions.
Newthink use high-purity silicon carbide raw materials to make silicon carbide seal rings with a density of up to 3.16g/cm3.
Machining accuracy can reach 0.01mm, surface finish can reach Ra0.03.
Newthink implement precise and efficient production to control costs and provide our clients with efficient and money-saving solutions.
Quickly respond to customer requests and make suggestions based on drawings.
ISO certified, 100% full inspection to ensure no cracks, no defects, and ensure stable and reliable quality.
Successfully applied to chemical, photovoltaic, military, semiconductor and other industry fields.
Silicon Carbide Seal Ring Production Workshop
With over 14 years of experience in advanced ceramics, Newthink specializes in manufacturing high-performance silicon carbide seal rings using precision equipment for forming, sintering, and surface finishing. We offer both reaction bonding and pressureless sintering to meet diverse application needs. From prototypes to mass production, every step, from shaping to final polishing, is strictly controlled to ensure consistent quality, dimensional accuracy, and long-term durability.
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Technical Data of Silicon Carbide Seal Ring
Newthink provides different silicon carbide seal rings to meet the various requirements of the clients from domestic and abroad markets.
- RBSiC & SSiC
- Comparison of Corrosion Resistance of Different SiC Materials
| Item | Unit | SSiC | RBSiC |
| Densidade | g/cm3 | 3.08-3.16 | 2.9-3.02 |
| Hardness HV1 | Kg/mm2 | >2550 | >2350 |
| Young’s Modulus | GPa | 410 | 400 |
| Bending Strength (1200℃) | MPa | 400 | 280 |
| Compressive Strength | MPa | >2500 | >2250 |
| Coefficient of Linear Expansion | 10–⁶/K | 4.0-4.5 | 4.3-4.8 |
| Max Working Temperature | ℃ | 1650 | 1380 |
| Test Environment (Conc. Reagent) | Temp (°C) | Corrosive Weight Loss (No Free SiC) (mg/cm²·yr) | Corrosive Weight Loss (12% SiC) (mg/cm²·yr) |
| 98% H₂SO₄ | 100 | 1.8 | 55 |
| 50% NaOH | 100 | 2.6 | >1000 |
| 53% HF | 25 | <0.2 | 7.9 |
| 85% H₃PO₄ | 100 | <0.2 | 8.8 |
| 70% HNO₃ | 100 | <0.2 | 0.5 |
| 45% KOH | 100 | <0.2 | >1000 |
| 25% HCl | 70 | <0.2 | >1000 |
| 10% HF + 57% HNO₃ | 25 | <0.2 | >1000 |
Produtos relacionados
Anel de vedação de carboneto de silícioFor hydrocyclone and wear-resistant application in pumps, valves and other equipments.
Mancal deslizante de carboneto de silícioPara requisitos de alta carga e alta velocidade.
Silicon Carbide Oil SealDurable for its good wear resistance, oil resistance and corrosion resistance.
Silicon Carbide Piston RingUsed in internal combustion engines, compressors and other equipments.
- High hardness, can resist the erosion of particles in high-speed fluid.
- It has high compressive strength and bending strength, and can withstand high pressure without deformation.
- Good toughness makes it not easy to break when subjected to certain impact or vibration, and can better adapt to complex working conditions.
- Low friction coefficient helps to reduce the friction power consumption between the sealing surfaces and reduce the energy consumption of equipment operation.
This is a common fault. The following are common solutions: Select the type of silicon carbide seal ring strictly according to the working conditions (pressure, temperature, medium, speed); use a laser alignment instrument to calibrate to ensure concentricity; use double-end seals and add isolation fluid, preferably silicon carbide on silicon carbide wear-resistant combination, formulate a preventive maintenance plan, and train personnel to standardize operations.
The function of a silicon carbide gasket is to provide a seal between two components or flanges that have flat surfaces. A silicon carbide seal ring crafted from silicon carbide (SiC) is identified as a part that interfaces between engine mechanisms, pumps, and rotating shafts. Gaskets serve the purpose of providing non-moving seals. Silicon Carbide seal rings placed between engine parts, pumps, or rotating shafts are called dynamic seals because they manage fluid containment during movement.
The role of the silicon carbide seal ring is to ensure a safe and reliable seal ring between two mating surfaces, prevent liquid or gas leakage, prevent contaminants from entering, maintain normal function, and improve safety.
Silicon carbide seal achieves sealing through the relative rotation of two precisely matched rings (static seal ring and dynamic seal ring) to prevent leakage of media in the pump. The ultra-hardness and wear resistance of silicon carbide (hardness 2500 HV) can effectively reduce wear and tear. Silicon carbide seal rings achieve zero leakage and long service life in high-speed, high-pressure, and corrosive environments through the combination of material hardness + chemical inertness + thermal stability, and the reliability is improved by more than 50% compared with traditional seals.
Silicon carbide seal rings are better than other materials such as metals, alumina and zirconia. They possesses better hardness, wear resistance and corrosion stability. High thermal conductivity provides heat dissipation under high-speed rotation. Compared with alumina, SiC is harder and more corrosion-resistant. Compared with zirconia, SiC maintains stability even at high temperatures. SiC seal ring offers reliability in different industrial environment.
SiC seal rings perform well in harsh environment where traditional materials fail. They are ideal for corrosive, abrasive, high-temperature or high-pressure systems. SiC seal rings have good chemical stability and thermal conductivity. They provide effective heat management and maintain tight in high-speed pumps. They are also suited for applications requiring extreme cleanliness like semiconductor and pharmaceutical equipment.
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