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China FXZV Ceramic Downward Discharge Valve - Reliable Suppliers & Factory for High-Performance 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 (FAQ)
Q
What makes Y-TZP (Yttria-stabilized Zirconia) ceramic stand out compared to other ceramic materials?
Y-TZP offers an exceptional combination of high fracture toughness (10–12 MPa√m), high flexural strength (1150 MPa), and excellent corrosion resistance. It is one of the toughest ceramic materials available, making it ideal for demanding applications such as ceramic ball valves, pump components, and wear-resistant parts.
Q
Which ceramic material is best suited for high-temperature applications above 1200°C?
For operating temperatures up to 1500°C, 99 Al₂O₃ (99% Alumina), Si₃N₄ (Silicon Nitride), and SiC (Silicon Carbide) are the top choices. These materials maintain their structural integrity and mechanical properties at extreme temperatures, making them suitable for furnace components, high-temperature valves, and industrial linings.
Q
How does ZrO₂ ceramic perform in hydrofluoric acid (HF) environments?
ZrO₂ is rated C (significant corrosion, not recommended) for both 10% HF at 60°C and 46% HF at 95°C. For HF media, SiC is the recommended ceramic material, as it achieves an A rating (no significant corrosion) across all tested HF concentrations and temperatures.
Q
What do the corrosion ratings A, B, and C mean in the Anti-Corrosive Performance Reference Table?
The ratings indicate the corrosion rate of the material in a given medium: A (≤ 0.1 mmg/cm²/day) means negligible or no corrosion and is recommended for use; B (0.1–0.3 mmg/cm²/day) means slight corrosion and should be used with caution; C (≥ 0.3 mmg/cm²/day) means significant corrosion and is not recommended; -- indicates intense corrosion beyond measurable limits.
Q
How do I select the right V-port ball core angle for my ceramic ball valve?
The choice of ball core angle depends on your required flow capacity (Cv value). The O-type ball core provides the highest flow rate, while V60°, V45°, and V30° progressively reduce flow for more precise throttling control. For example, a DN50 valve with an O-type core has a Cv of 114, while the V30° core reduces it to 32. Select a smaller angle for tighter flow regulation in process control applications.
Q
Why is ceramic preferred over stainless steel (SS304/SS316) for corrosive media handling?
As shown in the Anti-Corrosive Performance Reference Table, stainless steel SS304 and SS316 often rate C (not recommended) in many acid environments such as HCL, H₂SO₄, H₃PO₄, and HF. In contrast, ceramic materials like ZrO₂, Al₂O₃, and SiC consistently achieve A ratings in these same media. Ceramics also offer zero water absorption and superior hardness, making them far more durable in aggressive chemical environments.