Products
VR 55
Material
VR 55 is an asbestos-free gasket material. It is composed of aramide fibers and other asbestos substitutes which are resistant to high temperatures. These substitutes are processed with high-grade elastomers under elevated pressure and temperature.
Properties
VR 55 is a highly conformable gasket material featuring high compressibility and flexibility plus very good sealability against fluids and gases.
Application
- for sealed joints on lightweight components where surface pressure is relatively low, e.g. on valve covers, oil pans, covers, in IC engines, compressors, pipelines, apparatus and transmissions.
- for sealing engine, transmission, hydraulic, and refrigerating oils
- for sealing fuels, water, mixtures of water and antifreeze & corrosion inhibitors.
Surfaces
As standard, both sides of VR 55 are coated with a non-stick, high-friction layer that greatly facilitates disassembly. In most cases, additional surface treatment is unnecessary.
Technical Data
(nominal thickness 2.00 mm)
Density | g/cm³ | 1.4 – 1.7 | |
Ignition loss acc. to DIN 52 911 | % | < 45 | |
Tensile strength | |||
acc. to ASTM F 152 across grain |
| N/mm² | > 8 |
acc. to DIN 52 910 across grain |
| N/mm² | > 6 |
Residual stress acc. to DIN 52 913 | |||
16 h, 175 °C | N/mm² | ≈ 24 | |
Compressibility and recovery | |||
acc. to ASTM F 36, procedure J | |||
compressibility | % | 14 – 23 | |
recovery | % | > 50 | |
Sealability against nitrogen | |||
acc. to DIN 3535, part 6 FA | mg/(s·m) | < 0.01 | |
Swelling acc. to ASTM F 146 | |||
in IRM 903 Oil (replaces ASTM Oil No. 3) | |||
5 h, 150 °C | |||
increase in thickness | % | < 10 | |
increase in weight | % | < 20 | |
in ASTM Fuel B | |||
5 h, room temp. | |||
increase in thickness | % | < 15 | |
increase in weight | % | < 20 | |
in water / antifreeze (50:50) | |||
5 h, 100 °C | |||
increase in thickness | % | < 5 | |
increase in weight | % | < 15 | |
Maximum continuous temperature | °C | 250 | |
Maximum operating pressure | bar | 80 | |
Max. continuous temperature and max. pressure must not occur simultaneously.
Please contact us for sealing parameters.
DIN 28091-2: | ||
Cold creep εKSW | % | 11 – 20 |
Cold recovery εKRW | % | 6 – 11 |
Hot creep during service εWSW/T | % | 60 – 70 |
Hot recovery εWRW/T | % | ≈ 0.8 |
Recovery R | mm | ≈ 0.015 |
Specific leakage rate λ | mg/(s·m) | < 0.025 |
Residual surface pressure | % | > 50 |
after 1000 h (in air at 100 °C) | ||
| Please contact us for sealing parameters. | ||
The data quoted above are valid for the material “as delivered” without any additional treatment. In view of the countless possible installation and operating conditions, definitive conclusions cannot be drawn for all applications regarding the behavior in a sealed joint. Therefore, we do not give any warranty for technical data, as they do not represent assured characteristics. If you have any doubt, please contact us and specify the exact operating conditions.
Form of delivery
Sheets
60” x 60”, 120″ x 60″, 180” x 60” (standard size)
Nominal thicknesses and tolerances acc. to ASTM F 104
Dimensional limits within a shipment
1/64” | +0.005”/-0.002” |
1/32” | ±0.005” |
3/64” | ±0.005” |
1/16” | ±0.008” |
3/32” | ±0.008” |
1/8” | ±0.008” |
Max. thickness variation in a sheet:
0.1 mm for sheet thickness ≤1.00 mm, and 0.2 mm for thickness >1.00 mm
Products
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