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High-Performance FRFV Rotary Seal Feed Ceramic Valve - China Suppliers & Factory for Non-Polluting 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 |
Typical Applications
- Used for pressure-fed titanium dioxide powder discharge valves, organic silicon powder conveying valves, and similar applications.
Frequently Asked Questions (FAQ)
Q
What are the main advantages of Y-TZP (Yttria-stabilized Zirconia) ceramic over other ceramic materials?
Y-TZP ceramic offers outstanding fracture toughness (10–12 MPa√m), high flexural strength (1150 MPa), and excellent compressive strength (2000 MPa). Compared to alumina ceramics, it provides superior toughness and impact resistance, making it ideal for demanding mechanical applications such as ball valves, pump components, and wear parts.
Q
Which ceramic material is best suited for highly corrosive chemical environments?
ZrO₂ (Zirconia) and 99.9% Al₂O₃ (Alumina) ceramics demonstrate the broadest corrosion resistance across most acids and alkalis, achieving an "A" rating (≤ 0.1 mmg/cm²/day) in most tested media including HCL, H₂SO₄, H₃PO₄, and HNO₃. SiC also performs well in HF environments where ZrO₂ is less suitable.
Q
What is the maximum operating temperature for ceramic ball valves?
The maximum operating temperature varies by ceramic material. 99 Al₂O₃, Si₃N₄, and SiC ceramics can withstand temperatures up to 1500°C, while 95 Al₂O₃ is rated up to 1250°C and 90 Al₂O₃ up to 1200°C. Y-TZP zirconia is limited to approximately 160°C for structural stability, while Mg-PSZ can operate up to 1000°C.
Q
How does the flow coefficient (Cv) vary between different ceramic ball valve core types?
The O-type ball core provides the highest flow coefficients, suitable for full-bore on/off control. V-notch cores (V60°, V45°, V30°) offer progressively lower flow rates with better throttling and control characteristics. For example, at DN100, the O-type core has a Cv of 456, while the V30° core offers 128, enabling precise flow regulation in process control applications.
Q
Why is ceramic preferred over stainless steel (SS304/SS316) for handling aggressive media?
Stainless steel grades SS304 and SS316 show significant corrosion (rated "C") in many common industrial media such as HCL and H₂SO₄, and can suffer intense corrosion (rated "--") in high-temperature acid environments. In contrast, ZrO₂ and Al₂O₃ ceramics consistently achieve an "A" rating across the same conditions, offering far superior chemical resistance, longer service life, and lower maintenance costs.
Q
What are the typical application scenarios for ceramic ball valves?
Ceramic ball valves are widely used in industries where wear resistance, corrosion resistance, and high-temperature performance are critical. Typical applications include pressure-fed titanium dioxide powder discharge valves, organic silicon powder conveying systems, chemical processing pipelines, slurry and abrasive media handling, and high-temperature industrial furnace gas control systems.