Properties and application
A combination of carbon and aramide fibers together with carefully selected fillers and binders in BACF 4000 is utilized to contribute to the improvement of chemical and thermal stability. BACF 4000 has very high torque retention properties, excellent chemical resistance and sealability, which enables low maintenance costs and high gasket safety. Due to its outstanding chemical properties and steam resistance BACF 4000 is a first-rate choice in sealing strong alkaline media and steam. BACF 4000 meets all demands for application in chemical industry, pulp and paper industry and saturated steam distribution. Special surface treatment provides simple replacement of the gasket after use. BACF 4000 can also be used as a superior material for the sealing of oils, fuels, gases, Freons, and for general application in pipelines, radiators, boilers and many other flanged joints.
Basis | |
Composition | Carbon fibres, NBR |
DIN 28091-2 | FA-C1-0 |
Colour | Greenish blue / Black |
Approvals applied for | BAM, DIN-DVGW (DIN 3535/6),
HTB (DVGW VP 401), TA-LUFT (VDI 2440), TARC/MRPRA |
Surface treatment
The standard version has a non-stick top and bottom layer. Additional surface treatment is generally unnecessary. Special treatment with graphite, silicone or PTFE on one or both sides is available on request.
Dimensions of standard sheet
Sheet size | mm | 1000x1500, 1500x1500, 3000x1500, 4500x1500 |
Thickness | mm | 0.5, 0.8, 1.0, 1.5, 2.0, 3.0 |
other dimensions and thicknesses on request
Technical data
Typical values for a thickness of 2 mm
Density | DIN 28090-2 | g/cm3 | 1,5 – 1,7 |
Compressibility | ASTM F 36/J | % | 6 – 11 |
Recovery | ASTM F/36/J | % | › 55 |
Tensile strength | DIN 52910 | N/mm2 | ≈ 9 |
Stress resistance | DIN 52913 | | |
16h, 300°C, 50N/mm2 | | N/mm2 | ≈ 30 |
16h, 175°C, 50N/mm2 | | N/mm2 | ≈ 35 |
Thickness increase | ASTM F 146 | | |
Oil IRM 903, 5h, 150°C | | % | ≤ 5 |
ASTM Fuel B, 5h, 23°C | | % | ≤ 5 |
Specific Leak Rate | DIN 3535/6 | mg/sm | ≈ 0,10 |
Compression modulus | DIN 28090-2 | | |
At room temperature: εKSW | | % | 6,5 – 11,3 |
At elavated temperature: εWSW/200°C | | % | 8,0 –12,0 |
Percentage creep relaxation | DIN 28090-2 | | |
At room temperature: εKRW | | % | › 3,5 |
At elavated temperature: εWRW/200°C | | % | ≈ 1,4 |
Recovery R | DIN 28090-2 | mm | ≈ 0,026 |
Max. operating conditions | | | |
Peak temperature | | °C/F | 440 |
Continuous temperature | | °C/F | 350 |
- with steam | | °C/F | 280 |
Pressure | | bar/psi | 120 |
