Ultra-long lifespan: Up to 10,000 switching cycles without leakage under harsh operating conditions.
Excellent sealing: High-roundness ball and self-lubricating surface achieve a "zero leakage" effect.
Chemical inertness: Resistant to most corrosive media except hydrofluoric acid.
Low friction loss: The surface oxide film reduces the friction coefficient and minimizes operating torque.
Zirconia Ceramic Valve Stem Product Introduction
Zirconia ceramic valve stems are key components of industrial valves made from zirconia (ZrO₂) as the main raw material, possessing the following characteristics:
1. Material Properties: Zirconia itself is an excellent inorganic non-metallic material with a melting point of approximately 2700℃ and a Mohs hardness of 8-8.5.
2. Manufacturing Process: A uniform and dense grain distribution structure is formed through precise control of raw material formulation, molding process, and sintering conditions.
3. Main Applications: Used in valves for conveying systems handling high-hardness particulate media (such as lime slurry) or corrosive media, ensuring long-term reliability of valve regulation and sealing.
Application Fields
1. Industrial Valves: Core components of ceramic control valves and ceramic ball valves; suitable for metallurgical molten metal transfer systems.
2. Special Operating Conditions: Semiconductor special gas transportation, resistance to hydrogen sulfide corrosion in the petrochemical industry.
3. Other Fields: Wastewater treatment projects, nuclear power plant cooling water systems.
Core Parameters
Performance indicators | Reference values | Comparative advantage |
hardness | HRA 88 or higher (second only to diamond) | Far superior to metal valve stems. |
Flexural strength | >800MPa | High toughness and impact resistance |
Compressive strength | >3000MPa | Withstand high-pressure fluids |
Temperature resistance | Suitable for most industrial high-temperature applications. | Excellent thermal stability |
Supports custom specifications.
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