Product: Alumina Ceramic Mechanical Seals / Seal Rings & Bushings
Manufacturer: Hunan Yuanhong New Materials Co., Ltd. (yhxceramic), Loudi, Hunan, China
Founded: 2016 | Experience: 9+ Years | Factory Area: 8,000㎡ | Production Lines: 15 | Staff: 82
Material & Purity Grades:
- Alumina Ceramics (Al₂O₃)
- Available Grades: 95%, 96%, 98%, 99%, 99.5%, 99.7%
Machining & Dimensional Capabilities:
- Maximum Outer Diameter (OD): 600 mm
- Flatness: ≤ 0.002 mm (Optical Flat Finish)
- Parallelism: ≤ 0.005 mm
- Verticality: ≤ 0.005 mm
- Surface Roughness: Ra 0.2 μm (Mirror Polished)
Key Performance Properties:
- Exceptional wear and abrasion resistance
- Chemical corrosion resistance to acids, alkalis, and abrasive slurries
- High temperature resistance up to 1600°C
- Zero-leakage sealing face precision
- High mechanical strength and dimensional stability
Application Fields:
- Mechanical Seals: Rotary and stationary seal faces for water, slurry, and chemical pumps
- Industrial Valves: Ceramic ball valves, valve seats, and sealing plates
- Bearings: High-speed, non-magnetic precision ceramic bearing rings
- Petroleum & Petrochemical: Downhole drilling, refining equipment, and slurry transport
- Chemical Processing: Highly corrosive chemical fluid transport and agitation
- Aerospace & Automotive: High-stress cooling pumps, turbine seals, and fuel system bushings
Certifications: ISO9001, CE, RoHS, REACH
MOQ: 1 piece (Prototyping and mass production)
Lead Time: 15–25 business days
Customization: Complete OEM/ODM supported with CAD/STEP technical drawings or physical samples
Quotation: Technical evaluation and quote within 24 hours
Quality Assurance: 100% CMM and optical flatness inspection before shipment, Trade Assurance protected
Key Selling Points
1:Engineered for zero-leakage fluid sealing, our alumina ceramic mechanical seals are lapped to extreme tolerances: flatness ≤ 0.002mm, parallelism and verticality ≤ 0.005mm, and mirror surface finish Ra 0.2μm. These optical-grade parameters ensure tight hydrodynamic sealing and eliminate fluid bypass under high pressures.
2:Yuanhong possesses advanced large-scale precision grinding and CNC lapping machinery capable of producing ceramic seal rings up to a maximum outer diameter of 600mm. From miniature automotive pump seals to large-diameter industrial mixer and compressor rings, we deliver consistent accuracy across all dimensions.
3:We provide a full spectrum of alumina purity grades — 95%, 96%, 98%, 99%, 99.5%, and 99.7% Al₂O₃. Buyers can select the optimal balance between mechanical impact resistance, chemical corrosion resistance, and cost efficiency depending on operating temperatures, speeds, and media.
4:Designed for harsh operating conditions, our ceramic seal rings and bushings deliver outstanding performance in mechanical seals, industrial valves, specialized bearings, petroleum extraction, petrochemical processing, aerospace fluid systems, and automotive cooling pumps. High wear resistance prevents abrasive damage from slurries.
5:Full OEM/ODM engineering is welcomed — custom step rings, dynamic/stationary faces, mating sleeves, and specialized groove geometries. Provide your CAD or STEP technical drawings and receive a comprehensive manufacturing feasibility review and quotation within 24 hours. MOQ starts from 10 piece.
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Thermal Conductivity @ 20°C
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Thermal Expansion a at 20–400°C
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Properties
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Unit
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95%Al2O3
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99%Al2O3
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99.5%Al2O3
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Dielectric Constant
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1MHz
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9.4
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9.9
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9.9
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Dielectric Strength
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V/m
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15 x 10 6
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15 x 10 6
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15 x 10 6
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Dielectric Loss
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1MHz
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4 x 10 -4
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4 x 10 -4
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4 x 10 -4
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Volume Resistivity @ 25°C
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Ω・cm
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>10 14
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>10 14
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>10 14
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Volume Resistivity @ 500°C
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Ω・cm
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>10 8
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>10 8
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>10 10
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Various Types of Alumina Ceramic Sealing Ring
We Can Do OEM and 0BM According to Your Drawing and Requirements.
Customization & Global Delivery
1:Custom Options: Outer & inner diameter, hole quantity/diameter/spacing, end steps, grooves, chamfers;
2:Sample Support: Free small samples for testing, fast processing solution per drawings or prototypes;
3:Quality Assurance: Factory inspection reports for dimensional accuracy, insulation performance and thermal resistance;
4:International Trade: FOB, CIF, DAP terms available, stable delivery to Europe, America, Southeast Asia, Japan and South Korea.
Packing
Q1. Do you provide product samples? Yes, we provide samples subject to availability. A nominal sample fee may apply in some cases, and shipping costs are borne by the customer.
Q2. What are your accepted payment methods? We accept T/T (bank transfer) in advance, Western Union, Alipay, and PayPal.
Q3. What is your typical delivery lead time? Lead times vary depending on product requirements, including material selection, dimensions, and specific manufacturing processes.
Q4. Do you perform quality inspection before shipment? Yes, we conduct 100% inspection of all goods prior to delivery to ensure they meet specified standards.
Q5. What other ceramic materials do you offer? We supply a range of advanced ceramic materials, including Alumina, Zirconia, Aluminum Nitride,Boron Nitride, Silicon Nitride, Machinable Glass Ceramic, and related specialized ceramic
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