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Meeting High-Pressure and High-Temperature Challenges — Silicon Nitride Ceramic Plungers Deliver Long-Term Sealing and Wear Resistance

2025-09-23

Manufacturers of hydraulic pumps and high-pressure systems often struggle with rapid wear and sealing failure of metal plungers. Exposure to corrosive or high-temperature fluids leads to scoring, pitting, and eventual leakage.

The silicon nitride ceramic plunger provides a proven solution. With bending strength above 1000 MPa and a friction coefficient below 0.3, it operates smoothly even under dry or poor-lubrication conditions. Its self-lubricating surface minimizes friction and heat buildup, ensuring stable sealing performance.

Unlike steel, Si₃N₄ does not react with liquid metals or corrosive media, offering excellent chemical stability and long-term reliability. Testing shows a service life three times longer than steel plungers, with consistent sealing and dimensional stability.

Today, silicon nitride plungers are widely adopted in high-pressure cleaning pumps, coating systems, hydraulic presses, and fuel delivery units, helping customers achieve lower downtime and reduced maintenance costs.

Wuxi Special Ceramic Electrical Co.,Ltd

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Al2O3 Ceramic

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Silicon Nitride Ceramics

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Silicon Carbide Ceramics

Cordierite Ceramics

zpp@wxspecialcera.com.cn 17351500728

No4 Longshan Road,Xinwu District,Wuxi City,Jiangsu Province

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