Specialized Graphite Sealing Gasket of Custom Thickness for High-Vacuum Deep-Cooling Systems in Petrochemical Refineries & Heavy Industrial Plants
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Specialized Graphite Sealing Gasket of Custom Thickness
For High-Vacuum Deep-Cooling Systems in Petrochemical Refineries & Heavy Industrial Plants
Products Description
Manufacturing Process
Product Range
- Expanded graphite sheets
- Graphite foil
- Graphite tape
- Graphite strips
- Graphite paper
Standard Specifications
| Parameter | Coil Type | Sheet Type |
|---|---|---|
| Width | 1000mm / 1500mm | 1000mm / 1500mm |
| Length | 30m / 50m / 80m | — |
| Thickness | 0.15–1.0mm | 1.0–5.0mm |
| Density | 0.8–1.25 g/cm³ | 0.8–1.25 g/cm³ |
Core Performance Indicators
| Item | Standard Value |
|---|---|
| Carbon Concentration | 99% |
| Sulfur Concentration | ＜1000 ppm |
| Chlorine Concentration | ＜45 ppm |
| Tensile Strength | 4.5 MPa |
| Compressibility | ＞40% |
| Recovery | ＞10% |
| Operating Temperature | -200°C ~ 600°C |
| Working Pressure | Up to 20 MPa |
| Thickness Tolerance | -0.04mm ~ +0.04mm |
| Dimension Tolerance | Custom per drawing |
| Density Tolerance | -0.06 ~ +0.06 g/cm³ |
Grade Classification (JB/T 53392-1999)
| Mechanical Data | Qualified Product | Top Grade | Superior Grade |
|---|---|---|---|
| Density Tolerance
|
±0.10
|
±0.05 | ±0.05 |
| Tensile Strength (MPa) | ≥3.2 | ≥4.5 | ≥5.0 |
| Compression Ratio (%) | 35–55 | 35–55 | 35–55 |
| Rebound Rate (%) | ≥9 | ≥11 | ≥12 |
| Stress Relaxation Rate (%) | ≤10 | ≤10 | ≤10 |
| Ash Content (%) | ≤6.0 | ≤3.0 | ≤1.0 |
| Heat Loss 450°C / 600°C | ≤1.0 / ≤20 | ≤0.5 / ≤15 | ≤0.5 / ≤15 |
| Sulfur Content (ppm) | ≤1500 | ≤1000 | ≤600 |
| Chloride Content (ppm) | ≤100 | ≤50 | ≤20 |
Key Performance Benefits
-
Extreme Thermal & Vacuum StabilityStable performance from deep-cooling cryogenic temperatures up to high-temperature service; low outgassing ideal for high-vacuum systems.
-
Superior Chemical ResistanceResists acids, alkalis, hydrocarbons, and corrosive media commonly found in petrochemical and refining environments.
-
Strong Mechanical ReliabilityHigh compression recovery and low stress relaxation ensure leak-free performance under pressure cycling and long-term service.
-
Custom Composite DesignCan be laminated with stainless steel or copper alloys for reinforced structural gaskets suitable for heavy-duty flanges and valves.
Typical Applications
- Dynamic shaft seals and packing rings for pumps, valves, and compressors
- Custom die-cut flange gaskets for pipelines, reactors, and pressure vessels
- High-vacuum chamber seals and thermal barriers in deep-cooling systems
- Heavy industrial seals for refineries, processing plants, and energy equipment
Cling-Seal Supply & Service Terms
- Target Customers: Mainly overseas corporate buyers, factory procurement, engineering firms, and OEM industrial clients.
- Shipping Origin: All orders shipped exclusively from China.
- Individual Buyers: Accepted only if the buyer agrees to cover full international shipping costs for single-piece dropshipping. Orders cannot be processed without confirmed freight arrangements.
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