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China Ceramic Eccentric Rotary Valve Suppliers - High Performance for Slurries and Gas-Solid Media | Factory Direct
Overview & Structural Features
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Full Ceramic Lining & Self-Cleaning: All internal surfaces are fully lined with ceramic, with no dead spaces or corners, providing excellent self-cleaning and making the valve ideal for crystallizing, scaling, sticky, or contaminated media.
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Simple Flow Path & Low Resistance: Ensures high flow capacity and efficient operation, minimizing erosion. At 90° full open, the valve core and pivot are positioned outside the flow path, while the stem and pivot are protected by ceramic sleeves.
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Wide Adjustable Range & High Kv Value: Offers precise control over flow rates, with an adjustable ratio of up to 200.
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Torque-Sealed, Forced Sealing Design: High shut-off performance with reduced friction between the rotor and valve seat, minimizing wear on sealing surfaces.
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Spherical Compression Seat: Effectively breaks up crystallized or sticky materials, enhancing performance in challenging media.
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Lightweight & Energy Efficient: Lighter than same-size ball valves, allowing actuators to operate with lower output torque, weight, and cost.
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Bidirectional Installation: Supports installation in either direction without affecting performance.
Main Technical Parameters
| Item | Y-ZrO Y-TZP | Mg-ZrO₂ M-PSZ | 90 Al₂O₃ | 95 Al₂O₃ | 99 Al₂O₃ | Si₃N₄ | SiC | Common Ceramics | Carbide Alloy | 45# Steel |
| Density g/cm³ | 6.0~6.05 | 5.72~5.74 | 3.45~3.55 | 3.6~3.75 | 3.9~3.95 | 3.2~3.33 | 3.15~3.25 | 3.0~3.5 | 14~18 | 7.8 |
| Hardness HRA/C | 87 | 85 | 90 | 90 | 92 | 92 | 94 | 50~60 | 70 | 36 |
| Flexural Strength MPa | 1150 | 900 | 350 | 370 | 450 | 1200 | 470 | 20~50 | 2000 | 804 |
| Fracture Toughness (KIC) MPa√m | 10~12 | 13~15 | 3.4 | 3.6 | 4.5 | 7 | 4 | -- | 20 | 101 |
| Compressive Strength MPa | 2000 | 1800 | 1700 | 2000 | 2200 | 2800 | -- | -- | 4000 | 2000 |
| Thermal Shock Resistance °C | 87 | 110 | -- | -- | 50 | 200 | 75 | -- | 500 | 500 |
| Thermal Expansion Coefficient ×10⁻⁶/°C | 9.6 | 10 | 7.6 | 7.8 | 8.3 | 3.4 | 4 | -- | 7 | 12 |
| Modulus of Elasticity GPa | 200 | 200 | 310 | 330 | 350 | 300 | 400 | -- | 600 | -- |
| Crushing Load KN (Φ6mm) | 15 | 10 | 3.5 | 3.6 | 4 | 18 | 3.5 | -- | -- | -- |
| Using Temperature °C | <160 | <1000 | <1200 | <1250 | <1500 | <1500 | <1500 | -- | -- | <560 |
| Water Absorption | 0 | 0 | 0.02% | 0.01% | 0.00% | 0 | 0.50% | 5~10% | -- | -- |
| Corrosion Prevention | Good | Good | Good | Good | Good | Good | Good | Flooey | Good | Flooey |
* Data sources: test results or issued original documents.
Anti-Corrosive Performance Reference Table
| Media | Temperature | ZrO₂ | 99.9% Al₂O₃ | SiC | Si₃N₄ | Graphite | PTFE | Fluororubber | SS304 | SS316 | HC |
| 20% HCL | 60°C | A | A | A | B | A | A | A | C | C | B |
| 20% HCL | 95°C | A | A | A | C | A | A | A | -- | -- | C |
| 90% H₂SO₄ | 60°C | A | A | A | A | A | A | A | C | C | B |
| 90% H₂SO₄ | 95°C | A | A | A | B | A | A | A | C | C | C |
| 60% H₃PO₄ | 60°C | A | A | A | C | A | A | A | C | C | A |
| 60% H₃PO₄ | 95°C | A | A | A | C | A | A | A | C | C | A |
| 10% HF | 60°C | C | B | A | A | A | A | A | C | C | B |
| 46% HF | 95°C | C | C | A | C | A | A | A | -- | -- | C |
| 60% HNO₃ | 60°C | A | A | A | C | B | A | A | A | A | C |
| 60% HNO₃ | 95°C | A | B | A | C | B | A | A | B | B | C |
| 30% NaOH | 60°C | A | B | A | B | A | A | A | A | A | A |
| 30% NaOH | 95°C | B | B | A | C | A | A | A | A | B | A |
✔ A
≤ 0.1 mmg/cm²/day — No or negligible corrosion, recommended for use.
⚠ B
= 0.1~0.3 mmg/cm²/day — Slight corrosion, use with caution.
✘ C
≥ 0.3 mmg/cm²/day — Significant corrosion, not recommended.
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Intense corrosion, measurement not possible.
Flow Characteristic Sheet of Ceramic Ball Valve
| Core Specifications | O-type Ball Core | V60° Ball Core | V45° Ball Core | V30° Ball Core |
| DN15 | 10 | 7 | 4 | 3 |
| DN20 | 18.2 | 12 | 8 | 5 |
| DN25 | 29 | 18 | 12 | 8 |
| DN32 | 47 | 30 | 20 | 13 |
| DN40 | 73 | 46 | 31 | 21 |
| DN50 | 114 | 72 | 48 | 32 |
| DN65 | 181 | 115 | 76 | 51 |
| DN80 | 292 | 185 | 123 | 82 |
| DN100 | 456 | 289 | 192 | 128 |
| DN125 | 712 | 452 | 300 | 201 |
| DN150 | 1025 | 650 | 432 | 289 |
| DN200 | 1822 | 1156 | 769 | 514 |
Typical Applications
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Coal Chemical Industry: Black and grey water control valves; quench water flow control valves.
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Non-Ferrous Metals Industry: Aluminum processing.
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Pulp & Paper Industry: Control of coatings or other additives in paper machines.
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Petrochemical Industry: Oil slurry and residue pipelines.
Frequently Asked Questions (FAQ)
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What makes a full ceramic lining ball valve better for sticky or crystallizing media?
The full ceramic lining covers all internal surfaces with no dead spaces or corners, which prevents material buildup and ensures excellent self-cleaning performance. This makes it particularly effective for handling crystallizing, scaling, sticky, or contaminated media that would otherwise clog or damage conventional valves.
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Which ceramic material offers the best corrosion resistance for strong acid applications?
ZrO₂ (Zirconia) and 99.9% Al₂O₃ (Alumina) both demonstrate excellent resistance (Grade A) against most strong acids including HCl, H₂SO₄, H₃PO₄, and HNO₃ at elevated temperatures. SiC also shows outstanding acid resistance, particularly against HF. The choice depends on the specific media, concentration, and operating temperature.
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What is the maximum adjustable ratio of the ceramic ball valve flow control?
The ceramic ball valve offers a wide adjustable range with a control ratio of up to 200, enabling precise regulation of flow rates across a broad spectrum of operating conditions. This high Kv value ensures efficient and accurate flow management in demanding industrial processes.
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Can the ceramic ball valve be installed in either flow direction?
Yes. The ceramic ball valve supports bidirectional installation, meaning it can be installed in either direction within the pipeline without any impact on its performance, sealing integrity, or service life. This flexibility simplifies installation and reduces the risk of errors during setup.
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How does the ceramic ball valve compare to standard ball valves in terms of weight and actuator requirements?
Ceramic ball valves are significantly lighter than conventional ball valves of the same size. This reduced weight means that actuators require lower output torque to operate the valve, which translates into smaller, lighter, and more cost-effective actuator selections — reducing both capital and operational costs.
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What industries are best suited for ceramic ball valve applications?
Ceramic ball valves are widely used in industries that handle aggressive or abrasive media, including: the Coal Chemical Industry (black/grey water and quench water control), the Non-Ferrous Metals Industry (aluminum processing), the Pulp & Paper Industry (coating and additive control), and the Petrochemical Industry (oil slurry and residue pipelines). Their durability and corrosion resistance make them ideal for these challenging environments.