Cemented carbide sealing valve balls are a key precision component in industrial valves, mainly used to control the opening and closing and regulation of fluids. In practical applications, cemented carbide sealing valve balls need to be precisely matched with valve seats made of hard alloy or other high-performance materials (such as silicon carbide, special ceramics) to form a sealing combination. When the valve is closed, the valve ball presses tightly against the valve seat under mechanical force (such as valve stem action) or fluid pressure, achieving a tight fit between the metal surfaces, thereby blocking the fluid passage.
I. Material Properties of Cemented Carbide Sealing Valve Balls
Hard alloy is typically made by sintering high-hardness tungsten carbide (WC) particles with a binder phase such as metallic cobalt (Co) through powder metallurgy. This material endows the valve core ball with extremely high hardness and wear resistance, far exceeding that of traditional metals such as stainless steel. It effectively resists the erosion and wear of solid particles in fluids (such as slurry and ash), significantly extending its service life under frequent opening and closing or high-speed fluid conditions. Furthermore, hard alloy sealing valve core balls possess excellent corrosion resistance and chemical stability, exhibiting superior resistance to most acids, alkalis, salts, and organic solvents, making them particularly suitable for environments with corrosive media, such as petrochemical, coal chemical, and polysilicon production.
II. Core Advantages of Cemented Carbide Sealing Valve Balls
High Reliability: Under harsh conditions such as high temperature, high pressure, strong corrosion, and high wear, it will not age, swell, or decompose like soft sealing materials, maintaining long-term stable sealing performance.
Wide Applicability: Capable of handling a wide range of temperatures and pressures, from ultra-low temperatures to medium and high temperatures, and from vacuum to high pressure.
Long Maintenance Cycle: Its superior wear resistance significantly reduces downtime for maintenance and component replacement due to sealing surface damage, lowering the total life cycle cost.
III. Main Applications of Cemented Carbide Sealing Valve Balls
Oil and Gas: Oil and gas transportation, water injection, fracturing, and other high-pressure, high-wear processes.
Chemical and Pharmaceutical Industries: Handling highly corrosive, toxic, or high-purity media.
Power and Metallurgy: Ash removal in power plants, coal-water slurry transportation, and metallurgical slurry control.
Nuclear Power and Deep-Sea Engineering: Extreme environments with extremely high safety and reliability requirements.
