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FERV Ceramic Eccentric Rotary Valve - Top China Suppliers & Factory for High-Performance Process Solutions
Overview & Structural Features
Full Ceramic Lining & Self-Cleaning
All internal surfaces fully lined with ceramic, no dead spaces or corners. Ideal for crystallizing, scaling, sticky, or contaminated media.
Simple Flow Path & Low Resistance
High flow capacity and efficient operation. At 90° full open, valve core and pivot are outside the flow path; stem and pivot protected by ceramic sleeves.
Wide Adjustable Range & High Kv Value
Precise control over flow rates with an adjustable ratio of up to 200.
Torque-Sealed, Forced Sealing Design
High shut-off performance with reduced friction between rotor and valve seat, minimizing wear on sealing surfaces.
Spherical Compression Seat
Effectively breaks up crystallized or sticky materials, enhancing performance in challenging media.
Lightweight & Energy Efficient
Lighter than same-size ball valves, allowing actuators to operate with lower output torque, weight, and cost.
Bidirectional Installation
Supports installation in either direction without affecting performance.
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 — No or negligible corrosion, recommended for use.
B = 0.1~0.3 mmg/cm²/day — Slight corrosion, use with caution.
C ≥ 0.3 mmg/cm²/day — Significant corrosion, not recommended.
-- Intense corrosion, measurement 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
🏭
Coal Chemical Industry
Black and grey water control valves; quench water flow control valves.
⚙️
Non-Ferrous Metals Industry
Aluminum processing applications.
📄
Pulp & Paper Industry
Control of coatings or other additives in paper machines.
🛢️
Petrochemical Industry
Oil slurry and residue pipelines.
Frequently Asked Questions (FAQ)
Q
What makes a full ceramic lining ball valve better suited for abrasive or corrosive media compared to standard metal valves?
Full ceramic lining ball valves cover all internal surfaces with ceramic material, eliminating dead spaces and corners where media can accumulate. This design provides exceptional resistance to abrasion, corrosion, and scaling, making them far superior to metal valves when handling crystallizing, sticky, or chemically aggressive fluids. The ceramic surfaces also offer outstanding hardness (up to HRA 94) and low water absorption, ensuring long service life even in harsh conditions.
Q
Which ceramic material is recommended for high-temperature applications above 1000°C?
For applications requiring operating temperatures above 1000°C, 95 Al₂O₃ (usable up to 1250°C), 99 Al₂O₃, Si₃N₄, or SiC ceramics are recommended, each supporting temperatures up to 1500°C. Y-ZrO / Y-TZP is limited to below 160°C, so material selection should be carefully matched to the actual process temperature.
Q
How does the V-type ball core differ from the O-type ball core in terms of flow control?
The O-type ball core provides the highest Kv flow values and is best suited for on/off or high-flow applications. V-type ball cores (V60°, V45°, V30°) offer progressively reduced Kv values, enabling more precise throttling and proportional flow control. The V30° core provides the finest control resolution, making it ideal for applications requiring accurate flow regulation over a wide adjustable range of up to 200:1.
Q
Is the ceramic ball valve suitable for handling hydrofluoric acid (HF)?
For HF service, material selection is critical. ZrO₂ and Al₂O₃ ceramics are rated C (significant corrosion) in 10% HF at 60°C and are not recommended. SiC and Si₃N₄ ceramics perform significantly better (rated A) in HF environments, along with PTFE and Fluororubber sealing materials. Always refer to the Anti-Corrosive Performance Reference Table and consult with our engineering team for specific HF concentration and temperature requirements.
Q
Can the ceramic ball valve be installed in both flow directions?
Yes. The ceramic ball valve supports bidirectional installation, meaning it can be mounted in either flow direction without any impact on sealing performance or flow characteristics. This flexibility simplifies piping design and reduces installation errors in the field.
Q
What industries are most suitable for ceramic ball valves, and why?
Ceramic ball valves are widely used in the coal chemical industry (black/grey water and quench water systems), non-ferrous metals processing (aluminum), pulp and paper manufacturing (coatings and additive control), and the petrochemical industry (oil slurry and residue pipelines). These industries involve highly abrasive, corrosive, or scaling media where standard metal valves fail prematurely, and the exceptional hardness, corrosion resistance, and self-cleaning properties of ceramic valves deliver significantly extended service life and reduced maintenance costs.