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China ESFV Rotary Star Feed Ceramic Valve - Precision Control from Reliable Suppliers & Factory
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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.
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Clean and Non-Polluting Suitable for applications requiring contamination-free handling of powders or fine particles.
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Precise Adjustment & Backflow Prevention Rotor design ensures smooth and controlled feeding, effectively preventing backflow.
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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.
| 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 |
- 🔋 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
❓ 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. Critical components such as the rotor and valve body are fully ceramic-lined, providing excellent wear resistance, corrosion resistance, and preventing any metal contamination of the processed material.
❓ Which ceramic material offers the highest hardness and wear resistance?
Based on the technical parameters table, SiC (Silicon Carbide) achieves the highest hardness rating of HRA 94, followed by Si₃N₄ and 99 Al₂O₃ at HRA 92. For applications requiring maximum hardness and wear resistance, SiC is the top choice among the listed ceramic materials.
❓ Is the ceramic ball valve suitable for handling highly corrosive media such as hydrochloric acid or sulfuric acid?
Yes. According to the anti-corrosive performance reference table, ZrO₂ and 99.9% Al₂O₃ ceramic materials achieve an "A" rating (≤ 0.1 mmg/cm²/day) when exposed to 20% HCL at 60°C and 90°C, as well as 90% H₂SO₄ at both 60°C and 95°C, making them highly recommended for these corrosive environments.
❓ What types of powder processing equipment is this ceramic rotary valve compatible with?
The ceramic rotary valve is a versatile feeding solution compatible with a wide range of powder processing equipment, including air-flow mills, mechanical crushers, ball mills, vibration mills, and stirred mills. It can also serve as a discharge device at the outlet of such equipment.
❓ 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 flow of 456, while the V60°, V45°, and V30° cores provide 289, 192, and 128 respectively. The V-type cores are designed for more precise flow control and metering applications, with smaller notch angles offering finer regulation.
❓ What are the typical industry applications for this fully ceramic-lined rotary valve?
The fully ceramic-lined rotary valve is widely used in battery powder discharge systems, chemical powder and fine particle handling in high-tech material processing industries, and as feeding or discharge devices for various powder processing mills. Its contamination-free design makes it especially suited for sensitive or high-purity material handling applications.