Non-Metallic Gaskets A “Soft Gasket” material is a term used when referring to a gasket material that is easily compressed under a low bolt load. This term has been used to distinguish the difference from a metallic gasket. A soft gasket material can be selected from a large variety of elastomers, compressed non-asbestos, PTFE, flexible graphite and high temperature sheet products. Soft gaskets are used in a wide range of applications such as for pipe flanges, heat exchangers, compressors and bonnet valves, to name just a few. Soft gasket material can be purchased in a variety of cut shapes or be provided in sheet or rolls Types 1- Compressed Non-Asbestos Sheet 2- Tanged Graphite Sheet 3- Rubber Sheet 4- PTFE Sheet 5- Envelope Gasket (PTFE with Nin-Asbestos)
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Non-Metallic Gaskets - Arabian Broz · 2018-10-29 · Non-Metallic Gaskets A “Soft Gasket” material is a term used when referring to a gasket material that is easily compressed
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Non-Metallic Gaskets
A “Soft Gasket” material is a term used when referring to a gasket material that is
easily compressed under a low bolt load. This term has been used to distinguish the
difference from a metallic gasket. A soft gasket material can be selected from a large
variety of elastomers, compressed non-asbestos, PTFE, flexible graphite and high
temperature sheet products. Soft gaskets are used in a wide range of applications such
as for pipe flanges, heat exchangers, compressors and bonnet valves, to name just a
few. Soft gasket material can be purchased in a variety of cut shapes or be provided in
sheet or rolls
Types
1- Compressed Non-Asbestos Sheet
2- Tanged Graphite Sheet
3- Rubber Sheet
4- PTFE Sheet
5- Envelope Gasket (PTFE with Nin-Asbestos)
Compressed Non-Asbestos Sheet
Most manufacturers of non-asbestos sheet materials use synthetic fibers, like aramid
or Kevlar, in conjunction with an elastomeric binder. The elastomeric binder makes
up a larger percentage of this sheet and thereby becomes a more important
consideration when determining applications
.
1- NON ASBESTOS GASKET JOINTING SHEET STYLE 01
Suitable for water/oil resistant gasket material for light to medium loading. Suitable
for low operating pressure, e.g. transformers, compressors and also used for
easily deformable components with low surface pressure like valve covers and
pans in internal combustion engines.
General Data
Material Composition(Type of fiber ) Aramid Fiber,
Mineral Fiber
Binders NBR
Operating Condition:
Max.Peak Temp 300°C
Max. Continuous Temp 220°C
Max.Continuous Temp. with steam160°C
Max. Operating Pressure 80 Kg/cm2
Specified Value Unit Test Method Properties S.NO
1.70 - 2.00 gm/cm3 DENSITY 1
TENSILE STRENGTH 2
> 8 N/mm2 (a) ACC to ASTM F152(ACROSS
GRAIN)
> 5 N/mm2 (b) ACC to DIN52910 (ACROSS
GRAIN)
5 – 15 % ASTM F36A COMPRESSIBILITY 3
> 50 % ASTM F36A RECOVERY 4
ASTM F 146 FLUID ABSORPTION 5
(a) IN ASTM OIL NO. 3
< 15 % NCREASE IN MASS
< 10 % INCREASE IN THICKNESS
ASTM F 146 (b) IN FUEL B
< 10 % INCREASE IN MASS
< 10 % INCREASE IN THICKNESS
ASTM F 146 (c) IN WATER/ANTIFREEZE
< 15 % INCREASE IN MASS
< 15 % INCREASE IN THICKNESS
< 35 % DIN 52911 IGNITION LOSS 6
< 1.0 cm /min. DIN 3535 SEALABILITY AGAINST Nitrogen 7
STRESS RESISTANCE 8
N/mm2 DIN 52913 16h 300 C
N/mm2 DIN 52913 16h 175 C
From 1.5 to 6 mm Thickness < 1mm = ± 0.10 mm
> 1mm = ± 10% Thickness Tolerance
± 50 mm Length
± 50 mm Width
2- STEEL NON ASBESTOS GASKET JOINTING SHEET STYLE 02
Suitable for oil resistant gasket material for light to medium loading. Suitable for
low operating pressure, e.g. transformers, compressors and also used for easily
deformable components with low surface pressure like valve covers and oil pans in
internal combustion engines.
General Data
Material Composition (Type of fiber) Aramid Fiber . Mineral Fiber
with metal gauge center
Binders NBR
Operating Condition:
Max.Peak Temp 300°C
Max. Continuous Temp 220°C
Max.Continuous Temp.with steam 160°C
Max. Operating Pressure 100 Kg/cm2
Specified Value Unit Test Method Properties S.NO
1.70 - 2.00 gm/cm3 DENSITY 1
TENSILE STRENGTH 2
> 8 N/mm2 (a) ACC to ASTM F152(ACROSS
GRAIN)
> 5 N/mm2 (b) ACC to DIN52910 (ACROSS
GRAIN)
5 – 15 % ASTM F36A COMPRESSIBILITY 3
> 50 % ASTM F36A RECOVERY 4
ASTM F 146 FLUID ABSORPTION 5
(a) IN ASTM OIL NO. 3
< 15 % NCREASE IN MASS
< 10 % INCREASE IN THICKNESS
ASTM F 146 (b) IN FUEL B
< 10 % INCREASE IN MASS
< 10 % INCREASE IN THICKNESS
ASTM F 146 (c) IN WATER/ANTIFREEZE
< 15 % INCREASE IN MASS
< 15 % INCREASE IN THICKNESS
< 32 % DIN 52911 IGNITION LOSS 6
< 1.0 cm /min. DIN 3535 SEALABILITY AGAINST Nitrogen 7
STRESS RESISTANCE 8
N/mm2 DIN 52913 16h 300 C
N/mm2 DIN 52913 16h 175 C
From 1.5 to 6 mm Thickness < 1mm = ± 0.10 mm
> 1mm = ± 10% Thickness Tolerance
± 50 mm Length
± 50 mm Width
3- NON ASBESTOS GASKET JOINTING SHEET STYLE 03
Suitable for high performance, oil resistant gasket material with excellent thermal,
chemical & mechanical properties. Suitable for compressors, pipelines,
transmission, gas meters and internal combustion engines, pipe unions & pumps
etc.
General Data
Material Composition (Type of fiber) Aramid Fiber, Mineral
Fiber
Binders High quality NBR
Operating Condition:
Max.Peak Temp 400°C
Max. Continuous Temp 270°C
Max.Continuous Temp.with steam 240°C
Max. Operating Pressure 150 Kg/cm2
Specified Value Unit Test Method Properties S.NO
1.70 - 2.00 gm/cm3 DENSITY 1
TENSILE STRENGTH 2
>14 N/mm2 (a) ACC to ASTM F152(ACROSS
GRAIN)
>11 N/mm2 (b) ACC to DIN52910 (ACROSS
GRAIN)
5 – 15 % ASTM F36A COMPRESSIBILITY 3
> 50 % ASTM F36A RECOVERY 4
ASTM F 146 FLUID ABSORPTION 5
(a) IN ASTM OIL NO. 3
<10 % NCREASE IN MASS
<8 % INCREASE IN THICKNESS
ASTM F 146 (b) IN FUEL B
< 10 % INCREASE IN MASS
<7 % INCREASE IN THICKNESS
ASTM F 146 (c) IN WATER/ANTIFREEZE
< 15 % INCREASE IN MASS
<7 % INCREASE IN THICKNESS
<30 % DIN 52911 IGNITION LOSS 6
<0.5 cm /min. DIN 3535 SEALABILITY AGAINST Nitrogen 7
STRESS RESISTANCE 8
~ 20 N/mm2 DIN 52913 16h 300 C
~ 30 N/mm2 DIN 52913 16h 175 C
From 1.5 to 6 mm Thickness < 1mm = ± 0.10 mm
> 1mm = ± 10% Thickness Tolerance
± 50 mm Length ± 50 mm Width
Tanged Graphite Sheet
Tanged graphite gaskets range of graphite sheet sealing materials are manufactured
from highly pure exfoliated graphite flake, with/without a reinforcing metallic core
316L with the standard product offering graphite with a carbon content of 98% whiles
for nuclear purposes its 99.85%.
Tanged graphite gasket laminates by Arabian Broz Gasket are suitable for moderately
high temperature/high pressure gasket applications with a wide range of media. Using
mechanical means or certain adhesives, graphite foils can be attached to the
reinforcing core.
Dimensions of standard sheets: Thickness: 1.5, 2.0 and 3.0mm (2mm available on request)