Flanged Ring-Type Silicon Carbide Ceramic Sealing Washer

Product Introduction

This product is a flanged ring-type silicon carbide (SiC) ceramic sealing washer manufactured using reaction sintering technology. Silicon Carbide (SiC), as a new generation of high-performance ceramic material, possesses hardness close to diamond and exceptional chemical stability. The product features a unique flanged ring design, with a central through-hole combined with a raised peripheral ring structure that creates a perfect sealing interface. The surface is precision polished to a mirror finish, presenting typical dense black ceramic characteristics. This structural design ensures sealing pressure while providing excellent positioning functionality.

Primary Applications

• High-Temperature Sealing: Widely used in dynamic/static sealing rings for chemical pumps, valves, and mechanical seal devices

• Special Equipment Insulation: Serves as high-temperature insulating gaskets in semiconductor equipment and power electronic devices

• Wear-Resistant Mechanical Components: Used as wear-resistant gaskets and positioning rings for bearing sleeves and mechanical guides

• Corrosive Environment Applications: Suitable for mechanical seals in pumps and valves under strong acid and alkali conditions

Product Advantages

• Exceptional Sealing Performance: Hardness up to HRA 94 ensures maintaining a complete sealing interface under high-pressure conditions

• Outstanding Temperature Resistance: Can maintain stable sealing performance long-term in high-temperature environments up to 1650°C

• Excellent Corrosion Resistance: Resistance to acid and alkali corrosion surpasses most metals and engineering plastics

• Superior Wear Life: Wear rate is only 1/5 that of hard alloys, extending service life by 5-8 times

• Low Thermal Expansion Coefficient: Thermal expansion coefficient of 4.2×10⁻⁶/°C ensures dimensional stability at high temperatures

Specifications Table

Manufacturing Process

High-purity silicon carbide powder → Binder addition → Isostatic pressing → Reaction sintering → Rough grinding → Precision polishing → Ultrasonic cleaning → Dimensional inspection → Laser marking → Vacuum packaging

Usage Instructions

1. Pre-Installation Preparation: Clean the sealing contact surface to ensure no scratches or contamination

2. Installation Alignment: Use special installation tools to ensure concentricity between the washer and sealing cavity

3. Clamping Force Control: Recommended clamping force ≤150N/mm² to avoid overload causing breakage

4. Temperature Adaptation: Initial heating should be gradual, with heating rate ≤100°C/h

5. Regular Inspection: Recommended to check sealing surface wear every 2000 hours of operation

After-Sales Service

18-month product quality warranty provided, with customer usage records established. Technical support responds 7×24 hours, emergency requirements supported within 5 working days. Free technical consultation and product selection services offered.

FAQ

1. Q: What is the sealing pressure rating of the washer?
   A: Standard product sealing pressure rating reaches 25MPa, special treatment can achieve up to 40MPa

2. Q: What are the advantages compared to graphite washers?
   A: Strength increased by 10 times, wear resistance improved by 20 times, and no graphite dust pollution

3. Q: Are non-standard size customizations supported?
   A: Complete customization supported, processing according to provided drawings, diameter range 10-500mm, thickness 3-50mm