Sheet Good Materials
Thermoseal Klingersil C-4500 is a premium grade, high-pressure gasket material designed for use in high-temperature alkaline media and superheated steam. C-4500 is a superior performance material suitable in the pulp and paper industry and the chemical industry.
This material is manufactured with carbon fibers and special heat-resistant additives and reinforced with a nitrile binder.
- Creep relaxation ASTM F38B : 20%
- Sealability ASTM F37A (1/32″) : <0.3 ml/h
- Gas Permeability DIN 3535/6 : < 0.1 ml/min
- Compressibility ASTM F36J 8– 14 %
- Recovery ASTM F36J : 50 % minimum
KLINGER Hot Compression Test
- Thickness Decrease 73°F (23°C): 12 % initial
- Thickness Decrease 572°F (23°C) : 10 % additional
- Weight increase ASTM F146 after immersion in
- Fuel B, 5h/73°F (23°C) : 10 % maximum
- Thickness Increase ASTM F146 after immersion in
- ASTM Oil IRM 901, 5h/300°F (149°C) : 0 – 5 %
- ASTM Oil IRM 903, 5h/300°F (149°C) : 0 – 3%
- ASTM Fuel A, 5h/73°F (23°C) : 0 – 5%
- ASTM Fuel B, 5h/73°F (23°C): 0 – 5%
- Dielectric Strength ASTM D149-95a : 1.5 kV/mm
- Density ASTM F1315 : 87 lb/ft ³ (1.4 g/cc ³)
- Leachable Chloride Content FSA Method : 200 ppm
- ASTM F104 Line Call Out : F712121B3E12K6M5
- Color: Black
The pressure/temperature graphs shown are the most current method of determining the suitability of a gasket material in a known environment. However, chemical compatibility must also be considered.
pT diagram for thickness 1/16":

Liquids

Gases & Steam
In area 1
the gasket material is suitable using common installment practices subject to chemical compatibility
In area 2
appropriate measures are necessary for installation of the gasket to ensure maximum performance. Please call or refer to KLINGER expert for assistance.
In area 2
appropriate measures are necessary for installation of the gasket to ensure maximum performance. Please call or refer to KLINGER expert for assistance.
In area 3
do not install gaskets in these applications without first referring to KLINGER expert or contacting KLINGER Thermoseal’s technical support service
