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China ESFV Rotary Star Feed Ceramic Valve Manufacturers, Suppliers, and Factory for Fine Particle Transport
⚙️ Performance Characteristics
- 🔵 Fully Ceramic-Lined: All internal surfaces in contact with the material are lined with alumina ceramic, providing excellent wear and corrosion resistance while preventing metal contamination. Critical components include the rotor and valve body lining.
- 🔵 Clean and Non-Polluting: Suitable for applications requiring contamination-free handling of powders or fine particles.
- 🔵 Precise Adjustment & Backflow Prevention: Rotor design ensures smooth and controlled feeding, effectively preventing backflow.
- 🔵 Versatile Feeding Solution: Ideal for use as a metered feeding device in air-flow mills, mechanical crushers, ball mills, vibration mills, stirred mills, and other powder-handling equipment. Can also function as a discharge device at the outlet.
📊 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
- 🔋 Battery powder discharge valves
- ⚗️ Chemical powders and fine particle handling in high-tech material processing
- ⚙️ Feeding devices for various powder processing mills and equipment
❓ Frequently Asked Questions
Q What materials are used for the internal lining of the ceramic rotary valve?
All internal surfaces in contact with the material are lined with alumina ceramic. This includes critical components such as the rotor and valve body lining, ensuring excellent wear resistance, corrosion resistance, and zero metal contamination.
Q Which ceramic material offers the best corrosion resistance for highly acidic environments?
Based on the anti-corrosive performance reference table, SiC (Silicon Carbide) demonstrates the broadest resistance across most acid media including HCL, H₂SO₄, H₃PO₄, and HF. ZrO₂ and 99.9% Al₂O₃ also perform well in most acids except HF environments.
Q What types of powder processing equipment is this valve compatible with?
The ceramic rotary valve is compatible with a wide range of powder processing equipment, including air-flow mills, mechanical crushers, ball mills, vibration mills, and stirred mills. It can serve as both a metered feeding device and a discharge device at the outlet.
Q What is the maximum operating temperature for 99 Al₂O₃ ceramic components?
According to the technical parameters table, 99 Al₂O₃ ceramic components can be used at temperatures up to 1500°C, making them suitable for high-temperature industrial applications.
Q How does the V-type ball core differ from the O-type ball core in terms of flow capacity?
The O-type ball core provides the highest flow capacity across all pipe sizes. For example, at DN100, the O-type delivers a Cv of 456, while the V60°, V45°, and V30° cores provide 289, 192, and 128 respectively. V-type cores are preferred for precise flow throttling and control applications.
Q Is the ceramic rotary valve suitable for battery manufacturing applications?
Yes. The fully ceramic-lined design makes it ideal for battery powder discharge valve applications, where contamination-free handling of fine particles is critical. The clean, non-polluting characteristics ensure product purity throughout the process.