Silicon nitride sealing spin ring

Product Introduction of Silicon Nitride Sealing Swivel Rings

High-pressure resistant silicon nitride sealing swivel rings are high-performance ceramic sealing components made from silicon nitride (Si₃N₄) material, possessing excellent wear resistance, high-temperature resistance, and chemical corrosion resistance. This product is manufactured using a vacuum hot-pressing sintering process, followed by precision grinding and polishing to ensure a high-precision sealing surface.

Product Performance

1. High Pressure Resistance: Can withstand alternating loads exceeding 50 MPa, suitable for high-pressure pumps, valves, and other equipment.

2. High Temperature Resistance: Maintains stable physical and chemical properties even at temperatures up to 1200°C.

3. Chemical Inertness: Exhibits strong resistance to strong acids (except hydrofluoric acid), strong bases, and various corrosive media.

4. Self-Lubricating: A silicon dioxide lubricating film can form on the surface, enabling low-wear operation without external lubrication.

5. High Mechanical Strength: Bending strength reaches 600-800 MPa, and fracture toughness is >6.0 MPa·m¹/².

Manufacturing Process

1. Raw Material Preparation: High-purity silicon nitride powder (purity >99.9%) is used.

2. Hot Press Sintering: Sintering is performed at 1600-1800℃ and a pressure of over 30 MPa.

3. Precision Machining: Diamond grinding technology is used, with dimensional accuracy controlled within ±0.005mm.

4. Surface Treatment: Surface roughness Ra ≤ 0.2μm.

Product Features

1. Service life is 3-5 times longer than traditional metal materials.

2. Can operate continuously for 5 years without leakage under extreme working conditions (such as temperature fluctuations of 200-800℃ + 65% nitric acid vapor).

3. Extends equipment maintenance cycles from 3 months to 3 years (taking hydrogen fuel cells as an example).

4. Reduces equipment operating resistance and improves working efficiency.

Application Fields

1. Mechanical Seals: Shaft seals for rotating equipment such as pumps, compressors, and mixers.

2. Semiconductor Equipment: Key components such as vacuum pumps and reactors.

3. Chemical and Petrochemical Industry: Seals for systems transporting highly corrosive media.

4. Aerospace: Engine guide bushings and combustion chamber components.

5. New Energy: Bipolar plate seals for hydrogen fuel cells.

6. Automotive Industry: Turbocharger rotors and battery production lines.

Supports custom specifications.