TESNIT® BA-U

TESNIT® BA-U combines very good thermomechanical properties and chemical resistance, making it a general-purpose gasket material. It is well-suited for gas and potable water supplies.

PROPERTIES

APPROPRIATE INDUSTRIES & APPLICATIONS

AUTOMOTIVE AND ENGINE BUILDING INDUSTRIESCOMPRESSORS & PUMPS
FOOD INDUSTRYGAS SUPPLY
GENERAL PURPOSEHEATING SYSTEMS
PETROCHEMICAL INDUSTRYPOTABLE WATER SUPPLY
REFRIGERATION & COOLINGSHIPBUILDING
VALVESWATER SUPPLY
Composition Aramid fibers, inorganic fillers, NBR binder. Optional steel wire mesh reinforcement.
Color Blue
Approvals and compliances
ABSAGA AS 4623BAM (oxygen)
DNV GLDVGW DIN 30653DVGW DIN 3535-6
EC 1935/2004ELL (hot)SVGW DIN 3535-6
TA Luft (VDI 2440)TZW W270WRAS
Sheet dimensions

Size (mm): 1500 x 1500 | 3000 x 1500 | 4500 x 1500
Thickness (mm): 0.5 | 1.0 | 1.5 | 2.0 | 3.0
Other sizes and thicknesses available on request

Tolerances

Length and width: ± 5 %
Thickness ≤ 1.0 mm: ± 0.1 mm
Thickness > 1.0 mm: ± 10 %

Surface finish

Standard: 4AS. Optional: graphite or PTFE.

TECHNICAL DATA

Typical values for 2 mm thickness
Density DIN 28090-2 g/cm3 1.7
Compressibility ASTM F36J % 11
Recovery ASTM F36J % 60
Tensile strength ASTM F152 MPa 12
Residual stress DIN 52913
50 MPa, 175°C, 16 h MPa 27
50 MPa, 300°C, 16 h MPa 23
Specific leak rate DIN 3535-6 mg/(s·m) 0.02
Thickness increase ASTM F146
Oil IRM 903, 150°C, 5 h % 2
ASTM Fuel B, 23°C, 5 h % 5
Compression modulus DIN 28090-2
At room temperature: εKSW % 9.5
At elevated temperature: εWSW/200°C % 16.1
Creep relaxation DIN 28090-2
At room temperature: εKRW % 4.7
At elevated temperature: εWRW/200°C % 0.8
Maximum operating conditions
Peak temperature °C/°F 350/662
Continuous temperature °C/°F 250/482
Continuous temperature with steam °C/°F 200/392
Pressure bar/psi 100/1450

P-T diagram EN 1514-1, Type IBC, PN 40, DIN 28091-2 / 3.8, 2 mm

P-T diagrams indicate the maximum permissible combination of internal pressure and service temperature which can be simultaneously applied to a given gaskets thickness, size and tightness class. Given the wide variety of gasket applications and service conditions, these values should only be regarded as a guidance for the proper gasket assembly. In general, thinner gaskets exhibit better P-T properties.
  • General suitability - Under common installation practices and chemical compatibility
  • Conditional suitability - Appropriate measures ensure maximum performance for joint design and gasket installation. Technical consultation is recommended
  • Limited suitability - Technical consultation is mandatory.

BO DIAGRAMS DIN 28090-1

σBO diagrams represent σBO values for different gasket material thicknesses. These values indicate the maximum in-service compressive pressures which can be applied on the gasket area involved without destructing or damaging the gasket material.

CHEMICAL RESISTANCE CHART

The recommendations made here are intended as a guideline for the selection of a suitable gasket type. As the function and durability of products are dependent upon a number of factors, the data may not be used to support any warranty claims. If there are specific type-approval regulations, these have to be complied with.

Legend:
  • Recommended
  • Recommendation depends on operating conditions,
  • Not recommended
Acetamide
Acetic acid, 10%
Acetic acid, 100% (Glacial)
Acetone
Acetonitrile
Acetylene (gas)
Acid chlorides
Acrylic acid
Acrylonitrile
Adipic acid
Air (gas)
Alcohols
Aldehydes
Alum
Aluminium acetate
Aluminium chlorate
Aluminium chloride
Aluminium sulfate
Amines
Ammonia (Gas)
Ammonium bicarbonate
Ammonium chloride
Ammonium hydroxide
Amyl acetate
Anhydrides
Aniline
Anisole
Argon (gas)
Asphalt
Barium chloride
Benzaldehyde
Benzene
Benzoic acid
Bio-diesel
Bio-ethanol
Black liquor
Borax
Boric acid
Butadiene (gas)
Butane (gas)
Butyl alcohol (Butanol)
Butyric acid
Calcium chloride
Calcium hydroxide
Carbon dioxide (gas)
Carbon monoxide (gas)
Castor oil
Cellosolve
Chlorine (dry)
Chlorine (in water)
Chlorine, <0.5% in water
Chlorobenzene
Chloroform
Chloroprene
Chlorosilanes
Chromic acid
Citric acid
Copper acetate
Copper sulfate
Creosote
Cresols (Cresylic acid)
Cyclohexane
Cyclohexanol
Cyclohexanone
Decalin
Dextrin
Dibenzyl ether
Dibutyl phthalate
Diesel oil
Diethyl ether
Dimethylacetamide (DMA)
Dimethylformamide (DMF)
Dioxane
Diphyl (Dowtherm A)
Esters
Ethane (Gas)
Ethers
Ethyl acetate
Ethyl alcohol (Ethanol)
Ethyl cellulose
Ethyl chloride (gas)
Ethylene (gas)
Ethylene glycol
Formaldehyde (Formalin)
Formamide
Formic acid, 10%
Formic acid, 85%
Formic acid, 100%
Freon-12 (R-12)
Freon-134a (R-134a)
Freon-22 (R-22)
Fruit juices
Fuel oil
Gasoline
Gelatin
Glycerine (Glycerol)
Glycols
Helium (gas)
Heptane
Hydraulic oil (Mineral)
Hydraulic oil (Glycol based)
Hydraulic oil (Phosphate ester-based)
Hydrazine
Hydrocarbons
Hydrochloric acid, 10%
Hydrochloric acid, 37%
Hydrofluoric acid, 10%
Hydrofluoric acid, 48%
Hydrogen (gas)
Iron sulfate
Isobutane (Gas)
Isooctane
Isoprene
Isopropyl alcohol (Isopropanol)
Kerosene
Ketones
Lactic acid
Lead acetate
Lead arsenate
Magnesium sulfate
Maleic acid
Malic acid
Methane (Gas)
Methyl alcohol (Methanol)
Methyl chloride (Gas)
Methylene dichloride
Methyl ethyl ketone (MEK)
N-Methyl-pyrrolidone (NMP)
Milk
Mineral oil type ASTM 1
Motor oil
Naphtha
Nitric acid, 10%
Nitric acid, 65%
Nitrobenzene
Nitrogen (Gas)
Nitrous gases (NOx)
Octane
Oils (Essential)
Oils (Vegetable)
Oleic acid
Oleum (Sulfuric acid, fuming)
Oxalic acid
Oxygen (gas)
Palmitic acid
Paraffin oil
Pentane
Perchloroethylene
Petroleum (Crude oil)
Phenol (Carbolic acid)
Phosphoric acid, 40%
Phosphoric acid, 85%
Phthalic acid
Potassium acetate
Potassium bicarbonate
Potassium carbonate
Potassium chloride
Potassium cyanide
Potassium dichromate
Potassium hydroxide
Potassium hydroxide, 20%, 80°C
Potassium iodide
Potassium nitrate
Potassium permanganate
Propane (gas)
Propylene (gas)
Pyridine
Salicylic acid
Seawater/brine
Silicones (oil/grease)
Soaps
Sodium aluminate
Sodium bicarbonate
Sodium bisulfite
Sodium carbonate
Sodium chloride
Sodium cyanide
Sodium hydroxide
Sodium hydroxyde, 50%, rt
Sodium hypochlorite (Bleach)
Sodium silicate (Water glass)
Sodium sulfate
Sodium sulfide
Starch
Steam
Stearic acid
Styrene
Sugars
Sulfur
Sulfur dioxide (Gas)
Sulfuric acid, 10%
Sulfuric acid, 20%
Sulfuric acid, 98%
Sulfuryl chloride
Tar
Tartaric acid
Tetrahydrofuran (THF)
Titanium tetrachloride
Toluene
2,4-Toluenediisocyanate
Transformer oil (Mineral type)
Trichloroethylene
Vinegar
Vinyl chloride (gas)
Vinylidene chloride
Water
White spirits
Xylenes
Xylenol
Zinc sulfate

All information and data quoted are based upon decades of experience in the production and operation of sealing elements. This data may not be used to support any warranty claims. With its publication this latest edition supersedes all previous issues and is subject to change without further notice.