KLINGER®top-chem 2000

Universal gasket material for high surface pressures at simultaneous high temperatures

KLINGER® top-chem 2000 offers the advantages of PTFE gaskets without the disadvantages commonly associated with PTFE materials.

This allows you to use these materials in applications where traditionally they are unsuitable, saving you maintenance time and improving plant safety.

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Advantages in the use of KLINGER®top-chem 2000

With KLINGER®top-chem 2000 the high relaxation typical of standard filled PTFE gaskets is not observed. At a load of 50 MPa and a temperature of 200°C the relaxation of this material is only just 2%.

This ensures that bolt forces are even under severe conditions.

Therefore it is not necessary to retighten the bolts and the risk of increasing the leakage through loss in surface pressure is minimized. This behavior is unique in the world of PTFE gaskets and can only be achieved with use of KLINGER®top-chem 2000.

KLINGER®top-chem 2000 has excellent chemical resistance in strongly acidic and alkaline applications and offers exceptional performance applications with high mechanical requirements at high temperatures.

Material characteristics

The universal heavy-duty gasket for an extremely wide range of applications in the chemical and petrochemical industries are well as in the shipbuilding industry for chemical tanker applications.

Due to its unique load bearing properties it is able to withstand high temperatures and pressures and it is the only PTFE gasket with a Fire Safe Certificate.

It is also the first choice in the food sector and in the pharmaceutical industry, for steam applications and in oxygen pipes and where special requirements are made acc. to TA Luft (German Clean Air regulation).


PTFE filled with silicon-carbide.

pT diagrams

The Klinger pT diagram provides guidelines for determining the suitability of a particular gasket material for a specific application based on the operating temperature and pressure only. Always refer to the chemical resistance of the gasket to the fluid.

1. In area one, the gasket material is normally suitable subject to chemical compatibility.
2. In area two, the gasket materials may be suitable but a technical evaluation is recommended.
3. In area three, do not install the gasket without a technical evaluation.

Technical Data – Typical values for 1.5mm thickness

Compressibility ASTM F 36 J 2%
Recovery ASTM F 36 J 55%
Stress relaxation DIN 52913
50 MPa, 16 h/260°C 35MPa
30 MPa, 16 h/150°C 28MPa
Klinger cold/hot compression
23°C / 50 MPa 2%
260°C / 50 MPa 5%
Tightness DIN 3535/6 0.5 ml/min
Tightness DIN 28090-2 0.05 mg/s m
Thickness/weight increase
H2SO4, 100%: 18 h/23°C 1/1%
HNO3, 100%: 18 h/23°C 1/2%
NaOH, 33%: 72 h/110°C 1/3%
Density 2.5g/cm3

Dimensions of the standard sheets

Sizes: 1500 x 1500 mm

Thicknesses: 1.0 mm, 1.5 mm, 2.0 mm, 3.0 mm; other thicknesses and sizes on request.

Thickness acc. DIN 28091-1, length ± 50 mm, width ± 50 mm

Function and durability

The performance and service life of KLINGER gaskets depend in large measure on proper storage and fitting, factors beyond the manufacture’s control. We can, however, vouch for the excellent quality of our products. With this in mind, please also observe our installation instructions.

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