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China FCCV8 Double Lining Ceramic Ball Valve - Reliable Suppliers & Factory for Corrosive Applications
Structural Characteristics and Advantages
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Double lining, double sealing: ensures enhanced safety and corrosion protection.
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Molded PTFE lining with dovetail groove fixation: prevents peeling or detachment.
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Split-body design with minimized cavity: avoids material accumulation, reducing leakage risks.
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Ceramic flow passage: guarantees high resistance to abrasion and chemical attack, extending valve lifespan.
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Enhanced external protection: preserves the integrity of the metal outer wall, reducing maintenance costs.
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
The FCCV8 is widely used in chemical plants, salt chemical industry, pharmaceutical production, and environmental protection systems, where media are strongly corrosive and highly volatile.
With its double safety protection and advanced lining technology, the FCCV8 is a high-security ceramic valve solution, delivering unmatched durability and reliability in the harshest industrial environments.
Frequently Asked Questions (FAQ)
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What is the purpose of the double lining and double sealing design in the FCCV8 ceramic ball valve?
The double lining and double sealing design provides two independent layers of protection against corrosion and leakage. This ensures that even if one layer is compromised, the second layer maintains a secure seal, significantly enhancing operational safety in aggressive chemical environments.
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Why is a ceramic flow passage used instead of metal in this valve?
Ceramic materials such as ZrO₂ and Al₂O₃ offer exceptional hardness (up to HRA 94), superior compressive strength, and outstanding resistance to chemical corrosion and abrasion. Unlike metal, ceramics do not corrode when exposed to strong acids, alkalis, or highly abrasive media, which significantly extends the valve's service life and reduces maintenance frequency.
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What industries are best suited for the FCCV8 ceramic ball valve?
The FCCV8 is ideal for chemical plants, salt chemical industry, pharmaceutical production, and environmental protection systems. It is specifically designed for applications involving strongly corrosive media, high-volatility fluids, and abrasive slurries where standard metal valves would degrade rapidly.
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How does the PTFE lining with dovetail groove fixation prevent detachment?
The PTFE lining is molded directly into a dovetail groove structure within the valve body. This mechanical interlocking method creates a secure physical bond between the lining and the body, preventing the lining from peeling, shifting, or detaching even under high pressure, temperature fluctuations, or repeated cycling conditions.
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What do the corrosion resistance ratings A, B, and C mean in the anti-corrosive performance table?
Rating A (≤ 0.1 mmg/cm²/day) indicates negligible or no corrosion — recommended for use. Rating B (0.1–0.3 mmg/cm²/day) indicates slight corrosion — use with caution. Rating C (≥ 0.3 mmg/cm²/day) indicates significant corrosion — not recommended. A "--" rating means corrosion is so intense it cannot be measured.
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What are the available ball core types and how do they affect flow control?
The FCCV8 is available with four ball core types: O-type (full bore, highest flow), V60°, V45°, and V30° (progressively reduced flow for more precise throttling control). The V-notch designs allow for better proportional flow regulation, making them suitable for applications requiring accurate flow adjustment across a wide range of pipe sizes from DN15 to DN200.