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China Suppliers Factory FCCV Unlined Hard Ceramic Ball Valve for Extreme Conditions - High Wear & Corrosion Resistance
Structural Characteristics and Advantages
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Three-piece floating ball structure for easy maintenance and reliable sealing.
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Connection options: internal thread, butt weld, and flange (standards DIN/ANSI/API/JIS available).
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Sealing design: ceramic-to-ceramic main seal with graphite auxiliary seal, ensuring leak-free operation up to 500°C.
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Full-bore passage minimizes pressure loss and prevents blockage when handling particulate or fibrous media.
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High strength ceramic ball and seat resist abrasion far beyond traditional metal valves.
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 |
Application Fields
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Steel industry: coal powder injection, hot metal desulfurization, silica and MgO handling.
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Gas and pneumatic conveying: sand, glass particles, cement, ore, and dust.
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Power plants: flue gas dust handling and abrasive ash systems.
Thanks to its robust design and unlined ceramic construction, the FCCV unlined hard ceramic ball valve provides long service life, reduced downtime, and excellent cost-performance ratio in environments where conventional alloy valves fail. It is the preferred choice for industries demanding maximum reliability under abrasive and high-temperature conditions.
Frequently Asked Questions (FAQ)
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What is the maximum operating temperature of the FCCV unlined hard ceramic ball valve?
The FCCV unlined hard ceramic ball valve is designed to operate at temperatures up to 500°C, thanks to its ceramic-to-ceramic main seal combined with a graphite auxiliary seal, which ensures leak-free performance under extreme thermal conditions.
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What ceramic materials are available for the ball and seat, and how do they differ?
Several ceramic grades are available, including Y-TZP (Y-ZrO₂), M-PSZ (Mg-ZrO₂), 90/95/99 Al₂O₃, Si₃N₄, and SiC. They differ in hardness, flexural strength, fracture toughness, thermal shock resistance, and maximum operating temperature. For example, 99 Al₂O₃ offers usage up to 1500°C, while Y-TZP provides superior flexural strength of 1150 MPa.
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Which connection standards are supported by the FCCV ceramic ball valve?
The valve supports multiple connection types including internal thread, butt weld, and flange connections. It is compatible with major international standards: DIN, ANSI, API, and JIS, making it suitable for global industrial applications.
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Is the FCCV ceramic ball valve suitable for handling corrosive media such as strong acids and alkalis?
Yes. The ceramic materials used — particularly ZrO₂, Al₂O₃, and SiC — demonstrate excellent corrosion resistance (rated A) against most strong acids such as HCL, H₂SO₄, H₃PO₄, and HNO₃, as well as alkalis like NaOH. Please refer to the Anti-Corrosive Performance Reference Table for specific media and temperature ratings before selection.
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What are the main advantages of a full-bore ceramic ball valve over a standard metal valve?
A full-bore ceramic ball valve minimizes pressure drop across the valve, prevents blockage when handling media containing particles or fibers, and offers significantly higher hardness (up to HRA 94 for SiC) compared to 45# steel (HRA 36). This translates to far superior abrasion resistance, longer service life, and reduced maintenance costs in demanding industrial environments.
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In which industries is the FCCV unlined hard ceramic ball valve most commonly used?
The FCCV valve is widely used in the steel industry (coal powder injection, desulfurization, silica and MgO handling), gas and pneumatic conveying systems (sand, cement, ore, glass particles), and power plants (flue gas dust and abrasive ash systems). It is the preferred solution wherever conventional alloy valves suffer rapid wear or corrosion failure.