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China Ceramic Wheel Valve Factory - Durable, Fully Ceramic-Lined Design from Leading Suppliers
⚙️ Main Technical Parameters
| Item | Y-ZrO₂ 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 |
ℹ️*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: Can be ignored or has no corrosion, recommended for use.
B
= 0.1~0.3 mmg/cm²/day: Slight or very minor corrosion, use with caution.
C
≥ 0.3 mmg/cm²/day: Significant corrosion, not recommended for use.
--
Intense corrosion, to the extent that measurement is 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 |
❓ Frequently Asked Questions
Q
What is the difference between Y-TZP (Y-ZrO₂) and M-PSZ (Mg-ZrO₂) ceramic materials?
A
Y-TZP (Yttria-stabilized Tetragonal Zirconia Polycrystal) offers higher density (6.0~6.05 g/cm³) and superior flexural strength (1150 MPa), making it ideal for high-stress applications. M-PSZ (Magnesia Partially Stabilized Zirconia) provides better fracture toughness (13~15 MPa√m) and thermal shock resistance (110°C), making it preferable in environments with significant temperature fluctuations.
Q
Which ceramic material is recommended for use in hydrofluoric acid (HF) environments?
A
For hydrofluoric acid environments, SiC (Silicon Carbide) is the top-rated material, achieving Grade A even at 95°C in 46% HF concentration. Si₃N₄ also performs well at lower HF concentrations (Grade A at 10% HF / 60°C). ZrO₂ and Al₂O₃ are not recommended for HF service as they receive a Grade C rating, indicating significant corrosion.
Q
How do I select the correct ball core type (O-type, V60°, V45°, V30°) for my ceramic ball valve application?
A
The O-type ball core provides the highest flow coefficient (Cv) and is suitable for full-bore on/off control. V-notch ball cores (V60°, V45°, V30°) are designed for flow regulation and throttling applications. The smaller the V-notch angle, the lower the flow coefficient and the more precise the flow control — V30° offers the finest modulation, while V60° provides a broader flow range. Selection depends on required flow range, rangeability, and control precision.
Q
What are the maximum operating temperatures for the different ceramic materials listed?
A
Operating temperature limits vary significantly by material: 99 Al₂O₃, Si₃N₄, and SiC all support up to 1500°C; 95 Al₂O₃ is rated up to 1250°C; 90 Al₂O₃ up to 1200°C; Mg-ZrO₂ (M-PSZ) up to 1000°C; and Y-ZrO₂ (Y-TZP) is limited to below 160°C due to phase transformation concerns. For high-temperature industrial processes, Si₃N₄, SiC, or high-purity alumina materials are the preferred choices.
Q
Why is ceramic material preferred over stainless steel (SS304/SS316) for corrosive media applications?
A
Ceramic materials such as ZrO₂, Al₂O₃, SiC, and PTFE consistently achieve Grade A corrosion resistance across a wide range of aggressive media including HCl, H₂SO₄, H₃PO₄, HNO₃, and NaOH. In contrast, SS304 and SS316 frequently receive Grade C ratings or show immeasurable (--) corrosion in many of these same media, particularly at elevated temperatures. Ceramics also offer zero water absorption (Y-ZrO₂, Si₃N₄) and excellent hardness, providing longer service life in demanding chemical environments.
Q
What does the fracture toughness (KIC) value indicate, and which material has the best toughness?
A
Fracture toughness (KIC) measures a material's resistance to crack propagation under stress — the higher the value, the more resistant the material is to sudden fracture. Among the ceramic materials listed, Mg-ZrO₂ (M-PSZ) achieves the highest ceramic toughness at 13~15 MPa√m, followed by Y-ZrO₂ (Y-TZP) at 10~12 MPa√m. While carbide alloy (20 MPa√m) and 45# steel (101 MPa√m) have higher values, zirconia ceramics offer the best balance of toughness and corrosion resistance for ceramic valve applications.