Carbon Graphite Seal Rings

These Carbon Graphite Seal Rings are designed for aircraft engines and gas turbines where lubrication is limited. Made from specially impregnated graphite, the seals are self-lubricating with a very low friction coefficient. No external oil is needed, ensuring reliable performance in oil-free environments. Precision grinding achieves face flatness ≤0.001 mm and inner hole roundness ≤0.002 mm.

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Product Introduction

Technical Parameters

Parameter	Value
Product Name	Carbon Graphite Seal Rings
Applicable Medium	Compressed air, gas, oil, oil mist
Operating Temperature	-70°C – 420°C
Operating Pressure	≤ 2.5 MPa
Linear Speed	≤ 120 m/s
Hardness	Shore 75 – 90 HS
Face Flatness	≤ 0.001 mm
Inner Hole Roundness	≤ 0.002 mm
Radial Gap	0.01 – 0.08 mm
Wear Rate	≤ 0.05 mm / 1,000 h
Design Life	≥ 4,000 flight hours

Key Advantages

1. Self-Lubricating for Oil-Free Areas

2. Stable Under High Temperatures

Unlike ordinary seals, these rings remain stable up to 420°C without softening, coking, or powdering. Special impregnation with metal or resin ensures corrosion resistance in oil and fuel environments, making them ideal for high-temperature, high-speed shafts.

3. High-Precision Manufacturing and Customization

We offer full precision processing and testing, enabling customization for your shaft diameter and matching elastic components. These seals meet strict aviation standards, with wear rates ≤0.05 mm per 1,000 hours and Shore hardness 75–90 HS. Backed by over 100 patents and a decade of experience, our Carbon Graphite Seal Rings provide reliable, long-term performance.