01
High-Performance FRFV Rotary Seal Feed Ceramic Valve - China Suppliers & Factory for Precision Control
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 |
* 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 |
≤ 0.1 mmg/cm²/day: Can be ignored or has no corrosion, recommended for use.
= 0.1~0.3 mmg/cm²/day: Slight or very minor corrosion, use with caution.
≥ 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 |
Typical Applications
- ✔ Used for pressure-fed titanium dioxide powder discharge valves, organic silicon powder conveying valves, and similar applications.
Frequently Asked Questions (FAQ)
What are the main advantages of Y-TZP (Y-ZrO₂) ceramic over alumina ceramics?
Y-TZP zirconia ceramic offers significantly higher flexural strength (up to 1150 MPa) and superior fracture toughness (10–12 MPa√m) compared to alumina ceramics. It also provides excellent corrosion resistance across a wide range of chemical media, making it ideal for demanding industrial applications such as ball valves and wear-resistant components.
Which ceramic material has the best resistance to hydrofluoric acid (HF)?
According to the anti-corrosive performance reference table, SiC (Silicon Carbide) demonstrates the best resistance to hydrofluoric acid (HF), rated "A" at both 10% HF/60°C and 46% HF/95°C conditions. ZrO₂ and 99.9% Al₂O₃ are rated "C" under high-concentration HF exposure and are not recommended in those environments.
What does the flow coefficient (Cv) data in the Flow Characteristic Sheet represent?
The flow coefficient values in the Flow Characteristic Sheet indicate the flow capacity of ceramic ball valves for different bore sizes (DN15 to DN200) and ball core types (O-type, V60°, V45°, V30°). Higher values correspond to larger pipe diameters and more open ball core configurations, helping engineers select the appropriate valve for their specific flow control requirements.
What is the maximum operating temperature for 99 Al₂O₃ ceramic components?
99 Al₂O₃ (99% alumina) ceramic can be used at temperatures up to 1500°C, making it one of the highest-rated materials in the comparison table for high-temperature applications. Its zero water absorption and excellent corrosion resistance further enhance its suitability for extreme operating conditions.
Why is a ceramic ball valve recommended for titanium dioxide powder and organic silicon powder conveying?
Ceramic ball valves are specifically suited for titanium dioxide powder discharge and organic silicon powder conveying due to their exceptional hardness, wear resistance, and zero water absorption. The ceramic surfaces resist abrasion from fine powder particles and do not react chemically with these materials, ensuring long service life and contamination-free operation in powder handling systems.
How does Si₃N₄ (Silicon Nitride) compare to SiC (Silicon Carbide) in terms of mechanical properties?
Si₃N₄ offers a higher flexural strength (1200 MPa vs. 470 MPa for SiC) and greater fracture toughness (7 MPa√m vs. 4 MPa√m), making it more resistant to mechanical shock. SiC, however, has a higher hardness (HRA 94 vs. 92), better thermal shock resistance (200°C vs. 75°C), and superior resistance to hydrofluoric acid. The best choice depends on the specific mechanical and chemical requirements of the application.