Dayoo Advanced Ceramic Co.,Ltd
Dayoo Advanced Ceramic Co.,Ltd
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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.
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
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
| Parameter | Unit | Technical Index |
|---|---|---|
| Material Composition | - | 99.3% SiC |
| Bulk Density | g/cm³ | 3.10±0.02 |
| Hardness | HRA | ≥94 |
| Compressive Strength | MPa | ≥2600 |
| Flexural Strength | MPa | ≥420 |
| Maximum Service Temperature | °C | 1650 (Inert Atmosphere) |
| Thermal Conductivity | W/m·K | 95 |
| Surface Finish | Ra | ≤0.2μm |
High-purity silicon carbide powder → Binder addition → Isostatic pressing → Reaction sintering → Rough grinding → Precision polishing → Ultrasonic cleaning → Dimensional inspection → Laser marking → Vacuum packaging
Pre-Installation Preparation: Clean the sealing contact surface to ensure no scratches or contamination
Installation Alignment: Use special installation tools to ensure concentricity between the washer and sealing cavity
Clamping Force Control: Recommended clamping force ≤150N/mm² to avoid overload causing breakage
Temperature Adaptation: Initial heating should be gradual, with heating rate ≤100°C/h
Regular Inspection: Recommended to check sealing surface wear every 2000 hours of operation
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.
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
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
Q: Are non-standard size customizations supported?
A: Complete customization supported, processing according to provided drawings, diameter range 10-500mm, thickness 3-50mm
