Top-Chem 2000 — Modified PTFE Gasket (filled with silicon carbide)
Top-Chem 2000 is a silicon-carbide filled PTFE sealing sheet engineered for low creep, superior chemical resistance and long-term tightness in demanding flange joints.
Description
Top-Chem 2000 is a heavy-duty modified PTFE sealing sheet filled with silicon carbide (SiC). It delivers PTFE’s outstanding chemical resistance while significantly reducing cold-flow (creep) and offering superior mechanical strength at elevated temperatures and surface pressures. Top-Chem 2000 is engineered for demanding chemical, petrochemical and ship-building applications where long-term tightness and safety under severe conditions are required.
Key benefits
- Outstanding chemical resistance — suitable for strong acids, alkalis, steam and oxygen in most service conditions.
- Low creep / no-creep behaviour under load — maintains bolt forces even at high temperature and surface pressure, reducing the need for retightening.
- Fire-safe certified — Top-Chem 2000 is the only PTFE gasket material awarded a Fire-Safe certificate (improves safety in fire scenarios).
- High mechanical strength — performs reliably at high surface pressures and elevated temperatures.
- FDA conformity available — suitable grades for food / pharmaceutical contact where required.
Typical applications
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Chemical processing plants (acid/alkali service).
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Glass-lined reactors and vessels.
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Steam and oxygen lines, high-temperature flange joints
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Shipbuilding and marine chemical services
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Wherever long-term tightness and reduced maintenance are critical.
Why choose TOP CHEM modified PTFE
TOP-CHEM 2000 modified PTFE combines PTFE’s unmatched chemical inertness with engineered fillers to deliver far better dimensional stability and dramatically reduced cold-flow compared with virgin PTFE. The result is a sealing material that keeps bolt loads longer, gives reliable long-term tightness under high surface pressures and elevated temperatures, and resists aggressive media — reducing maintenance downtime and retightening needs in demanding chemical and industrial applications.
Typical technical specifications
| Basis composition | PTFE filled with silicon carbide (SiC) | Sheet size | 1500×1500 mm | |||
| Color | Grey | Thickness | 1.5 mm,2.0 mm,3.0 mm | |||
| Certificates | Fire-Safe certificate BAM / DVGW / TA-Luft / DNV GL and other relevant test approvals are reported for various Top-Chem grades — check datasheet for each approval and grade scope. FDA conformity for component materials available in specified grades. |
Tolerances Thickness:±10% Length:±50mm Width:±50mm |
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| Industry | ||||||
| General industry/Chemical/Oil&Gas/Energy/Infrastructure/Pulp&Paper/ Marine/Automotive/Food&Beverage/Pharma |
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| TECHNICAL DATA-Typical values for a thickness of 2.0 mm | ||||||
| Compressibility | ASTM F36M | % | 4 |
|---|---|---|---|
| Recovery | ASTM F36M | % | 50 |
| Stress relaxation (DIN 52913) | 30 MPa, 16h / 150℃ | MPa | 28 MPa, 16 h / 260 °C: 36 MPa |
| KLINGER cold/hot compression (50 MPa) | thickness decrease at 23℃ | % | 5 |
| KLINGER cold/hot compression (50 MPa) | thickness decrease at 150℃ | % | 11 |
| Tightness | DIN 28090-2 | mg/(s × m) | 0.08 |
| Density | g/cm³ | 2.5 |
Applications & industries
- Chemical processing & corrosive service lines (acid/alkali tanks).
- Glass-lined reactors and vessels (sealing against fragile linings).
- Pharmaceutical & food (FDA/EU-compliant grades available).
- Semiconductor & wet-process equipment (low particle, clean packaging).
