Black Double-Step Silicon Carbide Ceramic Ring (Industrial Grade Wear-Resistant Sealing Component)

Product Introduction

This product is a high-performance industrial ceramic ring made of Reaction Bonded Silicon Carbide (SiSiC). It features a deep black appearance with a precision-ground surface finish of Ra ≤ 0.4μm. The unique double-step design combines concentric rings with multi-level planes, ensuring effective sealing surface contact while providing stable axial positioning capability. This product fully utilizes the high hardness, high-temperature resistance, and corrosion resistance of silicon carbide material, specifically designed for mechanical seals, bearing sleeves, and wear-resistant components in extreme working conditions.

Core Advantages

• Exceptional Wear Life: Hardness reaches Hv2000-2500, with wear resistance 7 times higher than ordinary alumina ceramics.

• Excellent High-Temperature Resistance: Maintains structural integrity at 1380°C (up to 1600°C in inert atmosphere), with outstanding thermal shock resistance.

• Stable Corrosion Resistance: Excellent resistance to most acid and alkali media (except hydrofluoric acid and hot concentrated alkalis).

• Low Density & High Stiffness: Density only 3.02–3.15 g/cm³, 60% lighter than metal components, while maintaining high mechanical strength (flexural strength ≥400MPa).

Primary Applications

• Chemical Machinery: Mechanical seal rings for reactors, shaft sleeves for pumps.

• High-Temperature Equipment: Guide rails for sintering furnaces, roller bearing sleeves.

• Energy Sector: Sealing components for nuclear power cooling pumps.

• Precision Machinery: Isolation rings for high-speed bearings.

Specifications Table

Manufacturing Process

Raw material formulation (silicon carbide powder + carbon black) → Isostatic pressing → CNC machining of step structure → Reaction sintering (1600°C) → Non-destructive testing → Precision surface grinding → Laser dimensional verification → Ultrasonic cleaning → Vacuum packaging.

Usage Instructions

1. Installation Preparation: Ensure the installation contact surface is clean and free of oil stains, and align the step groove with the base positioning pin.

2. Fastening Requirements: Use progressive diagonal tightening sequence for bolts, with torque not exceeding 20N·m to avoid local stress concentration.

3. Thermal Gap Reservation: Maintain 0.15–0.25mm thermal expansion gap with metal contact surfaces.

4. Medium Compatibility: Avoid use in hydrofluoric acid and molten alkali metal environments.

5. Initial Startup: Recommended stepwise heating at ≤200°C/h for thermal adaptation treatment.

After-Sales Service

• 12-month product quality guarantee

• Supports customization from drawings (minimum order quantity: 20 pieces)

• Provides material test reports and installation guide manuals

• Establishes exclusive product usage files for customers

FAQ

1. Q: What are the outstanding advantages compared to silicon nitride ceramic rings?
   A: Thermal conductivity is 3 times higher (110W/m·K), maximum service temperature is 400°C higher, making it more suitable for strong heat conduction scenarios.

2. Q: Do you support customization of non-standard step dimensions?
   A: Yes, we do. Please provide axial cross-sectional drawings and precision requirements. Standard customization cycle is 25 working days.

3. Q: What is the service life under strong acid conditions?
   A: Continuous service life ≥8000 hours in pH=2-10 working conditions. Annual flatness inspection of the sealing surface is recommended.

4. Q: Do you offer discounted reorders for broken parts?
   A: We provide fracture analysis reports and offer 5% discount on same-specification orders for replacement parts.