Products
VR 90
Material
VR 90 is an asbestos-free gasket material. It contains aramid fibers, inorganic fillers and other high-temperature resistant substances which are bonded with high-quality elastomers with high strength and especially gas-tight under increased pressure and increased temperature.
Properties
VR 90 does not contain any physiologically harmful substances or colour pigments.
VR 90 exhibits high tensile strength plus stress and shearing resistance. The material is ideally suited for sealing gases and fluids, e.g. oils, solvents, fuels, Freons, liquid gases, water/antifreeze mixtures, saline solutions and many other media. It is also suitable for sealing hot water and steam up to approx. 200 °C in stationary applications and with an installation surface pressure of at least 50 N/mm². Please consult us if you have a specific application.
Other characteristic properties of the material are excellent temperature resistance, stress resistance under high operating pressure, and ease of handling.
Application
- for DIN and ANSI flanged joints, apparatus, pumps, fittings and pipelines in industrial plants
- for fittings with very narrow sealing surfaces, e.g. in gas and hot water units, solar panels, convection radiators and couplings, etc.
- for sealed joints in IC engines subject to high mechanical and thermal stress (oil filters, intake manifolds, water, fuel & vacuum pumps, etc.)
- for transmissions, gearboxes, refrigerating & air compressors, etc.
Since VR 90 is physiologically safe, it is also suitable for use in contact with drinking water & foodstuffs, and for sealing highly pure, pollutant-sensitive products such as paint bases, vitamins, etc.
Surfaces
As standard, both sides of VR 90 are coated with a non-stick, high-friction layer that greatly facilitates disassembly. In most cases, additional surface treatment is unnecessary.
However, a graphite coating on one or both sides of the gasket is recommended when used with components that rotate on the gasket during assembly, e.g. in threaded couplings, radiator plugs, etc., as a low friction value is required in these cases.
Approval
DIN-DVGW
(acc. to DIN 3535, part 6 FA)
FDA- compliant
acc. to 21 CFR § 177.2600 – suitable for flat gaskets with all types of foodstuffs
WRAS
Certification of gasket materials for use in drinking water (acc. to British Standard BS 6920)
DIN 30653 (formerly VP 401)
Gaskets with higher thermal resistance (HTB)
Fire Safe
acc. to BS 6755 and API 6FB
BAM
German Federal Institute for Materials Research and Testing, flanged joints in oxygen-conducting steel pipes
Grade X
acc. to BS 7531
TA Luft
High-quality gasket (200 °C for 48 h and 2000 h)
Germanischer Lloyd (DNV GL)
Approval for shipbuilding
ZP 5123
H2 tested acc. to certification programme 5123 of DVGW CERT Gmb
Technical Data
(nominal thickness 2.00 mm)
Density | g/cm³ | 1.8 – 2.0 |
Ignition loss acc to DIN 52 911 | % | < 34 |
Tensile strength | ||
acc. to ASTM F 152 accross grain | N/mm² | > 18 |
acc. to DIN 52 910 accross grain | N/mm² | > 12 |
Residual stress acc. to DIN 52 913 | ||
16 h, 300 °C | N/mm² | ≈ 25 |
16 h, 175 °C | N/mm² | ≈ 36 |
Compressibility and recovery | ||
acc. to ASTM F 36, procedure J | ||
compressibility | % | 5 – 8 |
recovery | % | > 55 |
Sealability against nitrogen | ||
acc. to DIN 3535, part 6 FA | mg/(s·m) | ≈ 0.02 |
Swelling acc. to ASTM F 146 | ||
in IRM 903 Oil (replaces ASTM Oil No. 3) | ||
5 h, 150 °C | ||
increase in thickness | % | < 7 |
increase in weight | % | < 7 |
in ASTM Fuel B | ||
5 h, room temp. | ||
increase in thickness | % | < 10 |
increase in weight | % | < 10 |
in water / antifreeze (50:50) | ||
5 h, 100 °C | ||
increase in thickness | % | < 10 |
increase in weight | % | < 10 |
Content of water-soluble chloride | ppm | < 100 |
Thermal conductivity | W/(m·K) | ≈ 0.7 |
Dielectric strength | ||
after storage at 50% relative | ||
humidity, 48 h | kV/mm | ≈ 20 |
at 300 °C, 4 h | kV/mm | ≈ 30 |
Electrical specific resistance | ||
after storage at 55% relative | ||
humidity, 48 h | Ω·cm | ≈ 1 x 1012 |
at 120 °C, 1 h | Ω·cm | ≈ 2 x 1013 |
Short-term peak temperature | °C | 400 |
Maximum continuous temperature | °C | 250 |
with steam up to | °C | 200 |
with metal inner bead (AFM 34 CO ME) with steam up to | °C | 220 |
Maximum operating pressure | bar | 150 |
Max. continuous temperature and max. pressure must not occur simultaneously.
Please contact us for sealing parameters.
DIN 28091-2: | ||
Cold creep εKSW | % | 5 – 8 |
Cold recovery εKRW | % | 3 – 5 |
Hot creep during service εWSW/T | % | 9 – 12 |
Hot recovery εWRW/T | % | ≈ 0.9 |
Recovery R | mm | ≈ 0.016 |
Specific leakage rate λ | mg / (s·m) | < 0.1 |
Media resistance | ||
Residual surface pressure | % | > 50 |
after 1000 h (in air at 100 °C) | ||
Sealing parameters: Characteristics acc. to EN 13555 are available on request. | ||
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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