Product Overview
Compressed non-asbestos gasket sheets (CNAGS) are made by compressing a blend of aramid fibers, mineral fillers, and high-temperature elastomers. They serve as a safe, reliable replacement for asbestos-based materials, offering excellent chemical and thermal resistance, good compressibility and recovery, and dependable sealing under oil, steam, and heat. Ideal for medium- to high-pressure flanged joints in oil & gas, petrochemical, power, and general industrial equipment. Available in standard sheets, custom-cut rings, and certified grades (ASTM, EN)
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Reliable sealing performance across common industrial service conditions.
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Regulatory-compliant material options (no asbestos).
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Lower lifecycle cost vs. repeated maintenance: good ageing and creep resistance.
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Quick custom-cut parts for OEM assemblies and maintenance spares.
Key Features & Quick Facts
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Asbestos-free composition — aramid fibers, inorganic fillers, elastomer binder.
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Wide service range — typical service up to 200–450°C depending on grade.
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Good chemical resistance — oils, fuels, mild acids/alkalis (specify per grade).
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High compressibility & recovery — seals uneven flanges at moderate bolt loads.
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Available certified grades — ASTM-compliant, EN standards, low-ash options.
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Custom services — die-cutting, bonded metal gaskets, adhesive backing.
Product Aliases
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Compressed Non-Asbestos Gasket Sheet
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Compressed Asbestos Free Gasket Sheet
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Non-Asbestos Gasket Sheet
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Compressed Fibre Gasket Sheet
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CNAGS (abbreviation)
Technical Specifications
Material
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Fiber: aramid / cellulose blends
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Fillers: inorganic minerals (e.g., mica, clay)
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Binder: NBR / SBR or special high-temp elastomers
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Optional: graphite or PTFE facings for higher chemical/temperature resistance
Representative Physical Properties
| Property | Typical Value (example) |
|---|---|
| Sheet sizes | 1000 × 1000 mm / 1500 × 1500 mm / 2000 × 2000 mm |
| Thickness range | 0.5 mm – 6.0 mm (standard) |
| Density | 1.3 – 1.8 g/cm³ |
| Temperature limit | Up to 200°C standard; high-temp grades up to 450°C |
| Compressibility | 7–20% (depends on thickness & grade) |
| Recovery | ≥50% typical |
| Ash content | Low (specify grade) |
| Color | Brown / gray / black (varies by formula) |
Standard & Common Sizes
Typical Compressed Non-Asbestos Gasket Sheet Offerings
| Standard SKU | Size (mm) | Thickness |
|---|---|---|
| NAGS-101 | 1000 × 1000 | 1.0 mm |
| NAGS-102 | 1500 × 1500 | 2.0 mm |
| NAGS-103 | 2000 × 2000 | 3.0 mm |
| Custom | As requested | 0.5–6.0 mm |
Common Die-Cut Ring Examples
| Part No. | ID | OD | Thickness |
|---|---|---|---|
| NAGS-R1 | 25 mm | 50 mm | 2.0 mm |
| NAGS-R2 | 50 mm | 80 mm | 2.0 mm |
| NAGS-R3 | 150 mm | 200 mm | 3.0 mm |
Typical Applications & Industries
Typical Applications & Industries-
Oil & gas pipelines, valve and pump seals
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Petrochemical and refinery equipment
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Power plants and steam systems (use high-temp grades)
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Water treatment and desalination plants
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Marine engineering and shipboard seals
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Compressors, heat exchangers, and flange joints
Advantages & Buyer Benefits
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Asbestos-free & compliant — meets regulatory safety requirements.
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Cost-effective — competitive price vs. specialty PTFE/graphite for many services.
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Good oil & steam resistance — adaptable via grade selection.
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High compressibility — accommodates flange irregularities.
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Customizable — cut to drawing, bonded to metal rings, facings available.
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Proven supply for OEM & MRO — consistent sheet quality and traceability.
Material Comparison Table
| Feature / Material | Compressed Non-Asbestos | Compressed PTFE | Compressed Graphite | Rubber (NBR/EPDM) |
|---|---|---|---|---|
| Chemical resistance | Good (grade dependent) | Excellent | Moderate (not for oxidizers) | Poor–Fair |
| Temperature range | up to 200–450°C (grade) | -190°C to +260°C | up to ~450°C | -40°C to +120°C |
| Compressibility/recovery | High | Low–Medium | Medium | High |
| Cleanliness / contamination | Low (inorganic fillers) | Very low | Potential for particle shedding | Can swell in oils |
| Typical cost | Moderate | High | Moderate–High | Low |
| Best use case | Oil/steam flanges, general industrial | Food/pharma, aggressive chemicals | High-temp steam | Low-temp liquid seals |
Highlight where compressed non-asbestos is the best value: mid-temp, oil/steam, cost-sensitive maintenance programs.
Customization & Value-Added Services
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Die-cutting to DXF/PDF/CAD drawings.
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Bonded metal rings (spiral wound or PTFE-faced options).
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Surface facings: graphite, PTFE, metallic facing.
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Adhesive backing for easy placement.
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Private label packaging for OEM customers.
Installation, Maintenance & Best Practices
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Clean flange faces; remove old gasket remnants.
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Use correct gasket thickness for gap and bolt load.
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Apply recommended bolt torque sequence and values—provide torque chart for common flange classes.
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Inspect periodically; replace if deformation or chemical attack is observed.
FAQ
Q1: What is the minimum order quantity (MOQ)?
A: Standard stock sheets MOQ is typically 10 sheets. Custom die-cut MOQ usually starts at 200 pcs per SKU — tooling fees may apply. Contact sales to negotiate.
Q2: How long is the lead time?
A: Stock items ship in 1–5 business days. Custom die-cut parts: 7–21 calendar days depending on quantity and tooling.
Q3: Can you ship internationally?
A: Yes — we ship by express, air and sea. We support EXW/FOB/CIF terms and provide standard export documentation.
Q4: Are custom sizes and drawings accepted?
A: We accept DXF/CAD/PDF drawings. For new die tooling, tooling charges may apply; many standard sizes are cut without tooling fees.
Q5: What are common services for oil & steam applications?
A: Use PTFE or graphite facing grades for more aggressive chemicals or higher temperatures; specify grade when requesting quote.
Q6: Do you offer cleanroom packaging?
A: Yes — for food, pharma or other sensitive industries, clean packaging options are available.
