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China Angle Valve Suppliers - High-Quality Ceramic Angle Valve from Trusted Factory
FCAV Ceramic Angle Valve
Liquids that are both flash-prone and corrosive present particular challenges. For example, flash steam in steel valves induces both corrosion and erosion of the soft oxide layer generated by corrosion, producing damage greater than either mechanism alone. In such cases, structural ceramics with inherent corrosion and wear resistance provide an excellent solution.
The main sealing pair and the fixed circular plate seat of the ceramic angle valve are made of high-performance structural ceramic materials, providing excellent wear resistance, corrosion resistance, and erosion resistance, significantly extending the valve's service life. With a simple and compact structure, the valve features low operating torque, is not prone to jamming, and has a self-cleaning function. There is no high-frequency vibration between the valve core and the seat, effectively avoiding the high-frequency vibration noise issue found in traditional linear stroke plunger angle valves, as well as preventing scratching and sticking between the valve core and the sealing seat.
Structural Characteristics
- Both the valve core and seat have flow channels, creating a planar seal at the edges of the valve core and seat flow channel holes. The valve core rotates relative to the seat to achieve throttling, opening, and closing of the fluid.
- The valve is quarter-turn, allowing for direct installation of quarter-turn actuators. This significantly reduces the overall dimensions compared to linear actuators, thereby reducing the valve's installation space.
- Each valve seat and valve core are paired and ground to ensure the valve's sealing performance.
- The valve core and seat are always in close contact, preventing high-frequency vibration and avoiding valve core fracture due to such vibrations.
- The valve core and seat are made of structural ceramics, and the remaining flow channels are lined with ceramics, providing excellent corrosion, wear, and erosion resistance, greatly extending the valve's service life.
- A wide spiral wound gasket is set within the mortise and tenon seal structure, ensuring zero leakage of the casing under pipeline stress or cyclic thermal stress.
- The packing box is equipped with a "live load" that maintains a constant load even under high wear conditions, ensuring long-lasting packing life.
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 |
Main Applications
Media with both flashing and corrosive properties are particularly troublesome. Reducing the speed of erosive fluids and selecting valves with minimal changes in fluid direction can minimize particle impact. Ceramic angle valves have excellent erosion resistance, corrosion resistance, and cavitation resistance, enhancing valve service life and ensuring long-term stable operation.
- Coal Chemical Industry: Black water angle valve.
- Hydrometallurgy: Discharge pipeline from high-pressure leaching autoclave to flash tank.
- Exhaust pipeline from high-pressure leaching autoclave.
- Pipeline from flash tank to adjustment tank.
- Controls high-pressure autoclave pressure and slurry discharge volume.
Frequently Asked Questions
What makes the FCAV Ceramic Angle Valve suitable for flash and corrosive media?
The valve's main sealing pair and fixed circular plate seat are manufactured from high-performance structural ceramics, which offer inherent corrosion resistance, wear resistance, and erosion resistance. This makes it especially effective in handling media that are simultaneously flash-prone and corrosive, where conventional steel valves would suffer accelerated damage from combined corrosion and erosion mechanisms.
How does the quarter-turn design benefit installation and operation?
The quarter-turn design allows direct mounting of quarter-turn actuators, which significantly reduces the overall valve assembly dimensions compared to linear stroke actuators. This compact configuration saves installation space, simplifies actuator selection, and enables faster response during open/close operations.
How does the FCAV Ceramic Angle Valve prevent high-frequency vibration issues?
The valve core and seat are always maintained in close contact, eliminating the gap that causes high-frequency vibration in traditional linear stroke plunger angle valves. This design prevents vibration-induced noise, avoids valve core fracture, and eliminates scratching or sticking between the valve core and the sealing seat.
What sealing measures are used to ensure zero leakage in the casing?
A wide spiral wound gasket is integrated within a mortise and tenon seal structure. This combination ensures zero leakage from the valve casing even under pipeline stress or cyclic thermal stress conditions, providing long-term sealing reliability in demanding process environments.
Which ceramic materials are available for the valve core and seat, and how do they compare?
Several structural ceramic options are available, including Y-TZP (Y-ZrO₂), M-PSZ (Mg-ZrO₂), 90/95/99 Al₂O₃, Si₃N₄, and SiC. Each material offers different profiles in hardness, flexural strength, fracture toughness, compressive strength, thermal shock resistance, and corrosion resistance, allowing selection based on specific process media, temperature, and mechanical requirements.
What are the primary industrial applications of the FCAV Ceramic Angle Valve?
The FCAV Ceramic Angle Valve is widely used in the coal chemical industry as a black water angle valve, and in hydrometallurgy for discharge pipelines from high-pressure leaching autoclaves to flash tanks, exhaust pipelines from autoclaves, pipelines from flash tanks to adjustment tanks, and for controlling high-pressure autoclave pressure and slurry discharge volume.