Product: Custom 99% Alumina Ceramic Rotary Valve Disc for Seawater Drainage
Material Grade: 99.5% High-Purity Technical Alumina Ceramics (Al2O3 >= 99.5%)
Manufacturer: Hunan Yuanhong New Materials Co., Ltd. (yhxceramic), Loudi, Hunan, China
Established: 2016 | Facility Area: 8,000 sqm | Production Lines: 15 | Workforce: 82
Product Overview
|
|
Certified Material Properties (as per Laboratory Performance Chart):
- Density: 3.90 g/cm3 (Dense fine-grained microstructure)
- Rockwell Hardness: 91 HRA (Extreme abrasive wear resistance)
- Vickers Hardness: 1550 HV1
- Flexural Strength: 320 MPa (High fracture toughness and water hammer resistance)
- Compressive Strength: 2300 MPa (Superior axial load bearing)
- Maximum Use Temperature: Up to 1400 deg C in oxidizing or inert atmosphere
- Thermal Expansion Coefficient: 6.8 x 10^-6 K^-1 (20-1000 deg C)
- Thermal Conductivity: 32 W/m.K
- Thermal Shock Resistance: Delta T 220 deg C
- Volume Resistivity at 20 deg C: 10^15 Ohm.cm (Excellent dielectric insulation)
- Dielectric Strength: 20 kV/mm
|
Key Selling Points:
Selling Point 1 — 100% Seawater & Chemical Corrosion Resistance
Manufactured from high-purity 99.5% Al₂O₃ alumina technical ceramics. Completely chemically inert to chloride ions, saline water,
aggressive acids, and alkaline slurries. Eliminates galvanic corrosion, pitting, and scaling completely, lasting 5–10 times longer than
duplex stainless steel and titanium alloys.
Selling Point 2 — High Hardness (91 HRA) & Robust Flexural Strength (320 MPa)
Lab-certified physical performance: Rockwell hardness of 91 HRA (1550 HV1) and flexural strength of 320 MPa, paired with 2300 MPa
compressive strength. Easily withstands severe hydraulic pressure pulsations, water hammer impacts, and high-velocity abrasive slurry
flows without chipping.
Selling Point 3 — Precision CNC Milled Hydrodynamic Sector Ports & Stepped Cavity
Advanced 5-axis CNC machining creates smooth sector-shaped fluid openings, internal stepped depth relief cavities, and peripheral
radial indexing guide notches. Optimized fluid passage design minimizes cavitation, turbulence, and dynamic pressure drops.
Selling Point 4 — Optical Mirror-Lapped Sealing Surfaces (Flatness Down to 0.002mm)
Both sealing faces undergo ultra-fine double-sided diamond lapping, achieving flatness down to 0.002mm and surface roughness down
to Ra 0.02μm. Guarantees hermetic dynamic rotary sealing with ultra-low friction torque and zero leakage in high-pressure drainage lines.
Selling Point 5 — Multi-Industry Applications: Marine, Power & Mining Drainage
Field-proven reliability across demanding industries: seawater desalination brine discharge, marine ballast water systems, thermal power
plant flue gas desulfurization (FGD) slurry valves, and mineral processing tailings drainage where severe abrasion and corrosion coexist.
Selling Point 6 — Factory Direct Customization & 100% CMM Coordinate Inspection
Produced in Hunan Yuanhong's 8,000㎡ precision ceramics facility with ISO9001 certification. Every piece is 100% verified using coordinate
measuring machines (CMM) and monochromatic optical flats. Fast engineering evaluation delivers custom prototypes in 3–7 business days.
Key Geometric & Engineering Features:
- Circular rotary distribution disc profile with precision center drive shaft bore
- Hydrodynamically optimized sector-shaped flow ports for high-flow, low-turbulence fluid discharge
- Stepped internal circular chamber for pressure relief and balanced fluid dynamics
- Peripheral radial indexing guide notches and outer circumferential locking slots for precise positioning
- Double-sided optical mirror lapped surfaces achieving flatness down to 0.002 mm and Ra 0.02 um
Target Media & Operating Environments:
- Natural seawater, concentrated brine, and marine ballast water
- Strong acidic, alkaline, and high-salinity industrial chemical effluents
- Abrasive mineral tailings slurry, sand-bearing wastewater, and limestone gypsum slurry
Quality Control & Assurance:
- Certifications: ISO9001, CE, RoHS, REACH
- Inspection: 100% CMM 3D Coordinate Measuring, Optical Flatness Interferometer Verification
- Prototyping Lead Time: 3 to 7 business days
- Production Lead Time: 15 to 20 business days
- Packaging: Form-fitted EPE shock-absorbing foam + Export-standard fumigated wooden crate
- Technical Service: 2D/3D CAD drawing design optimization and NDA confidential manufacturing
Application
Primary Application Sectors:
- Seawater Desalination: High-pressure reverse osmosis brine discharge & energy recovery valves
- Marine & Shipbuilding: Ballast water drainage, bilge water treatment, marine scrubber valves
- Power Generation: Coal-fired flue gas desulfurization (FGD) limestone slurry rotary shutoff valves
- Mining & Metallurgy: Tailings thickener discharge, hydrocyclone underflow rotary valves
- Chemical Processing: Metering and distribution of concentrated corrosive and erosive liquids
|
|
|
|
|
|
|
|
|
|
|
|
Thermal Conductivity @ 20°C
|
|
|
|
|
Thermal Expansion a at 20–400°C
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Properties
|
Unit
|
95%Al2O3
|
99%Al2O3
|
99.5%Al2O3
|
|
Dielectric Constant
|
1MHz
|
9.4
|
9.9
|
9.9
|
|
Dielectric Strength
|
V/m
|
15 x 10 6
|
15 x 10 6
|
15 x 10 6
|
|
Dielectric Loss
|
1MHz
|
4 x 10 -4
|
4 x 10 -4
|
4 x 10 -4
|
|
Volume Resistivity @ 25°C
|
Ω・cm
|
>10 14
|
>10 14
|
>10 14
|
|
Volume Resistivity @ 500°C
|
Ω・cm
|
>10 8
|
>10 8
|
>10 10
|
Various Types of Alumina Ceramic Part
We Can Do OEM and 0BM According to Your Drawing and Requirements.
Features of alumina ceramic
* Relatively low density;
* Extremely high operating temperature;
* Very high hardness and compressive strength;
* Excellent electrical insulation properties;
* Corrosion and wear resistance;
* Biologically inert, food compatibility.
Alumina Ceramic Properties
The following only lists the performance parameters of the three most common aluminum oxide ceramics. Normally, alumina ceramics
are composed of these types
Packing
|
Hunan Yuanhong New Material Co.,Ltd was established in 2016 ,there are over 100 sets of ceramic professional equipments , several types of furnace in more than 8000 square meters production workshops. ISO9001 certified, a variety of advanced ceramic materials are ROHS and REACH certified. |
Q1: Can this ceramic holder replace wooden guide block directly?
A1: Yes, we can produce same size as your original wooden block, direct replacement without modifying machine.
Q2: Is it resistant to cooling liquid and acid lye?
A2: 99 alumina ceramic has excellent chemical stability, completely resistant to common drawing cooling fluid, acid and alkali liquid.
Q3: Do you accept small trial order?
A3: Yes, small batch sample order is welcome for customer test.
Your message must be between 20-3,000 characters!