Product Overview
MOR sic seal rings are advanced ceramic sealing components engineered for demanding industrial scenarios. Made from high-purity silicon carbide, they deliver exceptional performance-boasting a Mohs hardness of 9.2 (second only to diamond), thermal conductivity of 120–200 W/(m·K), and resistance to wear, corrosion, and extreme temperatures. These traits make them ideal for mechanical seals in pumps, compressors, and rotating equipment where traditional metal or carbon seals fail.
Product Features
Exceptional Hardness & Wear Resistanc
With a Mohs hardness of 9.2 and wear rate ≤ 0.001 mm per 1000 hours (tested in abrasive slurries), these rings resist wear, abrasion, and erosion. Their service life of 12,000–18,000 hours is 3x longer than carbon graphite seals-ideal for water treatment pumps handling sand-containing slurries.
High Thermal Conductivit
At 120–200 W/(m·K) (5x higher than alumina ceramics), they efficiently dissipate heat. In 400℃ high-temperature pumps, they keep seal interface temperatures 30–50℃ lower than metal seals, avoiding thermal deformation and failure.
Strong Chemical Resistance
Resisting 98% of common corrosive media (98% sulfuric acid, 50% sodium hydroxide, petroleum solvents), their weight loss rate is ≤ 0.005% per 100 hours in 20% hydrochloric acid (25℃). This maintains integrity for chemical processing equipment.
Excellent Thermal Stability
Operating stably from -50℃ to 800℃ (power generation turbine temperatures), their dimensional change rate is ≤ 0.05% at 800℃-ensuring consistent sealing without cracking.
Low Friction Coefficient
A friction coefficient of 0.08–0.12 (paired with stainless steel shafts) reduces wear and energy use. For a 150 mm diameter pump shaft at 2800 rpm, this cuts energy consumption by ~10% versus stainless steel seals.
Lightweight & High Strength
With a density of 3.2 g/cm³ (40% lighter than stainless steel) and flexural strength of 450–550 MPa, they suit high-speed equipment (linear speed ≤ 200 m/s), reducing centrifugal force on the seal system.
Structural Details of MOR Silicon Carbide Seal Rings
| Outer Surface | Precision-machined to Ra 0.4 μm roughness for tight housing fit. For 100 mm outer diameter rings, maximum radial clearance with housing is ≤ 0.02 mm, preventing operation shifts. |
| Inner Surface | Ground to Ra 0.2 μm roughness with H7 inner hole tolerance, ensuring ≥ 99% shaft contact area-eliminating leakage gaps in high-pressure systems (up to 3 MPa). |
| Cross-Section | Standard rectangular cross-sections (thickness 5–25 mm, width 10–35 mm) are available, plus custom shapes (trapezoidal, U-shaped, grooved) with ±0.03 mm minimum tolerance-adapting to dry gas seals and split assemblies. |
Material selection
| ●Reaction-Bonded Silicon Carbide (RBSC) | Composed of 85–90% silicon carbide and 10–15% silicon, it offers flexural strength of 300–350 MPa and cost-effectiveness. Ideal for general industrial use (water treatment pumps, low-pressure compressors). |
| ●Sintered Silicon Carbide (SSIC) | Pure silicon carbide (purity ≥ 99%) with Mohs hardness 9.3, thermal conductivity 180–200 W/(m·K), and flexural strength 450–550 MPa. Suits harsh scenarios: chemical reactors, high-pressure oil and gas pipelines, power turbines. |
| ●Silicon Carbide with Graphite (SiC-G) | Infused with 5–10% graphite, it reduces friction to 0.06–0.09 for dry/low-lubrication environments (dry gas seals, vacuum pumps). |
Product application areas
Mechanical Seals：Used in pumps, compressors, and mixers to prevent leakage. Their low wear rate suits abrasive media (slurry pumps) and high-temperature compressors.
Chemical Processing：Ideal for reactors, agitators, and chemical transfer pumps-resisting corrosive media for pharmaceutical and petrochemical plants.
Oil and Gas Industry：Suitable for drilling mud pumps, wellhead valves, and high-pressure pipelines-withstanding H₂S corrosion and 600℃ temperatures in downhole equipment.
Power Generation：Integrated into steam and gas turbines-relying on thermal stability (-50℃ to 800℃) and high strength for reliable sealing.
Aerospace：Used in aircraft hydraulic systems and turbine engines-meeting weight (3.2 g/cm³) and high-temperature requirements.
Water Treatment：Resists sand/sludge wear in water pumps-extending service life in sewage treatment and desalination plants.
We offer tailored solutions for sic seal rings and silicon carbide seal rings
Size customization: Shaft diameters 20–600 mm, tolerance up to ±0.01 mm.
Structural customization: Split rings, dry gas seal rings with spiral grooves, SiC rings with DLC coating (enhancing wear resistance by 50%).
Material matching: Recommend optimal grades (RBSC/SSIC/SiC-G) based on customer working conditions (temperature, pressure, media).
Hot Tags: mor sic ssic seal rings, China mor sic ssic seal rings suppliers, factory, ptfe seal ring, carbon graphite seal rings, carbon o ring, seals spare parts, ptfe spring energized seals, tc seal ring
