Size range: Φ0.6-50mm (for grinding media), valve ball diameters cover DN15-DN1000.
Pressure rating: Commonly 1.6-32.0 MPa, also suitable for high-pressure homogenizers (>100 MPa).
Service life: Up to 10,000 cycles of opening and closing without leakage under harsh working conditions.
Zirconia Ceramic Valve Needle Product Introduction
Zirconia ceramic valve needles are valve components made primarily from high-performance zirconia ceramic (ZrO₂), possessing high hardness, excellent wear resistance, and superior chemical stability. Structurally, they typically consist of a zirconia ceramic ball and valve seat, manufactured using precision machining processes to ensure high sphericity and surface finish.
Application Fields
Zirconia ceramic valve needles are primarily used in industrial applications requiring stringent sealing, corrosion resistance, and wear resistance, including:
1. Energy and Power: Control of boiler steam pipelines in thermal power plants.
2. Chemical Industry: Transportation systems for corrosive media such as strong acids and bases.
3. Petroleum and Metallurgy: Wear-resistant control of high-particle-content fluids.
4. Pharmaceutical and Food Industries: Fluid control requiring high levels of cleanliness.
Production Process and Technical Parameters
1. Production Process
Dry powder isostatic pressing: Pressure > 150 MPa.
High-temperature sintering: Sintered at 1550℃ to form a dense microcrystalline structure.
Precision polishing: Achieves ultra-precision machining standards.
Material Characteristics and Advantages
characteristic | Parameters/Performance | Advantages |
hardness | HRA 88 or higher (Mohs hardness 8.5+) | The wear resistance is more than 10 times that of stainless steel. |
Corrosion resistance | Resistant to most acids and bases, except for hydrofluoric acid. | The service life is several times longer than that of metal valves. |
High temperature resistance | The melting point is as high as 2700℃. | Suitable for high-temperature fluid environments. |
Sealing performance | Surface finish meets W2 grade. | Achieve a "zero leakage" sealing effect. |
Mechanical properties | Bending strength exceeds 800 MPa. | Excellent impact resistance. |
Supports custom specifications.
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