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FAAV Ceramic A Valve: Premium China Suppliers & Factory for Long-Lasting, Zero-Leakage Solutions
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: 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 are the main differences between Y-TZP (Y-ZrO₂) and Mg-PSZ (Mg-ZrO₂) ceramic materials?
Y-TZP offers higher density (6.0–6.05 g/cm³), higher flexural strength (1150 MPa), and excellent fracture toughness (10–12 MPa√m), making it ideal for high-stress mechanical applications. Mg-PSZ has a slightly lower density (5.72–5.74 g/cm³) but superior fracture toughness (13–15 MPa√m) and better thermal shock resistance (110°C), making it better suited for applications involving thermal cycling.
Q
Which ceramic material has the best corrosion resistance against strong acids?
ZrO₂ (Zirconia) and 99.9% Al₂O₃ (Alumina) generally show excellent corrosion resistance (Grade A) against most strong acids including HCl, H₂SO₄, H₃PO₄, and HNO₃. However, both ZrO₂ and Al₂O₃ are not recommended for use with hydrofluoric acid (HF), where SiC demonstrates superior resistance.
Q
What is the maximum operating temperature for ceramic ball valves made from 99 Al₂O₃, Si₃N₄, or SiC?
All three materials — 99 Al₂O₃, Si₃N₄, and SiC — share the same maximum operating temperature of up to 1500°C, making them the top choices for high-temperature industrial applications. In contrast, Y-ZrO has a much lower operating limit of under 160°C, and 45# Steel is limited to below 560°C.
Q
How does the flow coefficient (Cv) change with different ball core types in ceramic ball valves?
The O-type ball core provides the highest flow coefficient across all pipe sizes (e.g., 1822 for DN200), offering full-bore, unrestricted flow. V60°, V45°, and V30° ball cores progressively reduce the flow coefficient, providing finer flow control. For example, at DN200, the V30° core has a Cv of only 514, approximately 28% of the O-type — ideal for precise throttling applications.
Q
Why is SiC (Silicon Carbide) preferred for applications involving hydrofluoric acid (HF)?
SiC achieves a Grade A corrosion rating for both 10% HF at 60°C and 46% HF at 95°C, while ZrO₂, Al₂O₃, and Si₃N₄ all show Grade C (significant corrosion) under similar conditions. SiC's unique chemical inertness to fluoride-based media makes it the preferred material for HF environments. Additionally, SiC offers high hardness (HRA 94), excellent compressive strength, and a very low thermal expansion coefficient (4 × 10⁻⁶/°C).
Q
How do advanced ceramics compare to carbide alloy and steel in terms of mechanical properties?
Advanced ceramics such as Si₃N₄ and ZrO₂ offer significantly lower density than carbide alloy (14–18 g/cm³) and steel (7.8 g/cm³), reducing component weight. While carbide alloy excels in compressive strength (4000 MPa) and fracture toughness (KIC 20), ceramic materials like Si₃N₄ achieve comparable flexural strength (1200 MPa) with far superior corrosion resistance and zero water absorption — advantages that steel and carbide alloy cannot match in chemically aggressive environments.