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FAAV Ceramic A Valve - Top China Suppliers and Factory for High-Performance Sealing Solutions
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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.
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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.
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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 |
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Frequently Asked Questions
QWhat is the difference between Y-TZP and M-PSZ zirconia ceramics?
Y-TZP (Yttria-stabilized Tetragonal Zirconia Polycrystal) offers higher density (6.0~6.05 g/cm³), superior flexural strength (1150 MPa), and excellent fracture toughness (10~12 MPa√m), making it ideal for high-stress mechanical applications. M-PSZ (Magnesia-stabilized Partially Stabilized Zirconia) provides slightly higher fracture toughness (13~15 MPa√m) and better thermal shock resistance (110°C), suited for environments with thermal cycling.
QWhich ceramic material has the best corrosion resistance against hydrofluoric acid (HF)?
SiC (Silicon Carbide) demonstrates the best performance against both 10% and 46% HF at elevated temperatures, rated "A" in all HF test conditions. Si₃N₄ also performs well at 10% HF/60°C. ZrO₂ and Al₂O₃ are not recommended for HF environments, as they are rated "C" under high concentration or high temperature HF exposure.
QWhat are the maximum operating temperatures for different ceramic materials?
99 Al₂O₃, Si₃N₄, and SiC all support operating temperatures up to 1500°C, making them suitable for high-temperature industrial applications. 95 Al₂O₃ can be used up to 1250°C, while 90 Al₂O₃ is rated up to 1200°C. Y-TZP zirconia has a relatively low upper limit of 160°C for continuous use, while M-PSZ can be used up to 1000°C.
QHow does the flow coefficient (Cv) vary between O-type and V-type ceramic ball valve cores?
The O-type ball core provides the highest flow coefficient across all pipe sizes — for example, DN200 delivers a Cv of 1822. V-type cores offer progressively reduced flow: V60° provides approximately 63% of the O-type flow, V45° approximately 42%, and V30° approximately 28%. V-type cores are designed for precise flow control and throttling applications, while the O-type core is optimized for full-bore, high-flow service.
QWhy is SiC ceramic not recommended for use with strong alkaline solutions like NaOH?
While SiC performs excellently in most acid environments, it maintains an "A" rating even in 30% NaOH at both 60°C and 95°C, making it one of the more versatile ceramic materials. However, Si₃N₄ is rated "C" in 30% NaOH at 95°C, meaning it is not suitable for high-temperature strong alkali service. Always refer to the corrosion table to match the right ceramic material to your specific chemical media and temperature conditions.
QWhat does zero water absorption mean for ceramic valve components?
Zero water absorption (0%) in Y-TZP, M-PSZ, and Si₃N₄ ceramics indicates a fully dense, non-porous microstructure. This means the material will not absorb process fluids, preventing contamination, swelling, or degradation over time. In contrast, common ceramics exhibit 5~10% water absorption, which can lead to structural weakening and chemical attack in wet or corrosive environments. Zero water absorption is a critical property for long-term reliability in fluid handling applications.