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Materials Guide
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Product Catalog >> Materials Guide
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The following guide will help
you pick the general class of materials suitable for your
application. These materials are available in uncut form as
well as in the form of gaskets.
In addition to these basic
materials, we fabricate products from a wide variety of
specialized materials (including ceramic, cork, fiberglass,
vegetable fiber, etc.). We can use materials designed to
handle ultra-high and ultra-low temperatures and extreme
chemical environments. If you don't see the specific
material you need just call - we can do it!
We will supply any of our
materials with pressure sensitive adhesive on one or both
sides. |
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Rubber is the most
cost-effective material to use where temperatures and
pressures are low and the chemical environment is mild.
Different elastomers offer different mechanical and chemical
properties. Cloth inserted materials are better able to
handle movement and high compression loads.
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|
Material |
Temp. (F) |
P Max (psi) |
Thick. (in.) |
Applications/Features |
| Butyl |
-40 to 225 |
150 |
1/16 to
1/4 |
Gases,
inorganic acids & alkalis. Excellent weather/abrasion
resistance. |
| EPDM |
-40 to 212 |
150 |
1/16 to 1/4 |
Water, steam,
animal/vegetable oils, oxygenated solvents. Excellent
weather resistance. |
| Natural
(Pure Gum) |
-20 to 140 |
100 |
1/32 to
1 |
Acids,
organic salts & alkalis. Non-toxic. Abrasion
resistant. Soft. |
| Neoprene |
-20 to 170 |
150 |
1/32 to 2 |
Oil/gasoline. Excellent
weather resistance. |
| Neoprene
- Cloth Inserted |
-20 to 170 |
150 |
1/32 to
1/4 |
Oil/gasoline. Excellent weather resistance. Handles
movement. High tensile strength. |
| Nitrile (NBR, Buna-N) |
-25 to 170 |
150 |
1/32 to 2 |
Oil/Aromatic fuels,
mineral, animal and vegetable oils, solvents and
hydraulic fluid. Available in commercial, premium and
FDA grades. |
| SBR (Red
Rubber) |
-20 to 170 |
150 |
1/32 to
1/4 |
Air,
hot/cold water. |
| SBR - Cloth Inserted |
-20 to 170 |
150 |
1/16 to 1/4 |
Air, hot/cold water,
saturated/low pressure steam. Excellent for high
compression loads. Handles movement. |
| Silicone |
to 400 |
150 |
1/32 to
1/4 |
High
temperature air or water (not oil or steam). Soft.
Available in FDA grade. |
| Vinyl |
20 to 160 |
150 |
1/16 to 1/4 |
Water, oxidizing agents.
Excellent weather/abrasion resistance. |
| Viton® |
to 400 |
150 |
1/32 to
1/4 |
Oil/Aromatic fuels, mineral, animal and vegetable
oils, solvents and hydraulic fluid. |
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Sponge
Neoprene,
Nitrile, Silicone and Viton® are also available in sponge
form. Closed cell sponge is available for applications
requiring high compressibility. Open cell is available for
cushioning applications where
sealing is not an issue. The basic physical and chemical
properties are the
same as for the elastomers in the table above. |
Non-Asbestos
gasket materials enhance the temperature and pressure
performance of rubber and vinyl by combining non-asbestos fibers
with the rubber. Metal inserted materials are able to operate at
even higher pressures.
Non-Asbestos materials replace natural asbestos fibers in
traditional gasket materials with various combinations of
fiberglass, aramid, inorganic and synthetic fibers.
Mercer carries Donex®, Durabla®, Garlock® and Thermoseal® (Klinger)
& Victor Reinz® brands of non-asbestos gasket materials. These materials are
available in thicknesses 1/64" through 1/4".
| Material |
Max T
(F) |
Max P
(psi) |
Creep
Relax'n
(%) |
Applications/ Features |
Non-Asbestos/
EPDM |
800 |
1200 |
15 |
Steam/oxygenated
solvents/
mild organic acids/alkalis. Excellent aging
properties. |
Non-Asbestos/
Hypalon |
400 |
900 |
40 |
Strong organic & inorganic acids/oils/aromatic
hydrocarbons, powerful oxidizing agents. |
Non-Asbestos/
Neoprene |
800 |
1200 |
15 |
Fuel/oils. Good
general purpose material. |
Non-Asbestos/
Nitrile |
800 |
1500 |
15 |
Steam/oil/fuel/solvent. Excellent general purpose
material with wide chemical resistance. |
Non-Asbestos/
Nitrile
- Metal Inserted |
850 |
2500 |
15 |
Hot gases. High
load/stress environments. Available with galvanized
low carbon steel foil or mesh insert. |
| Non-Asbestos/SBR |
800 |
1500 |
15 |
Steam/industrial gases.
Low pressure/temperature. |
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Carbon Fiber and
Graphite Flake sheets are able to withstand significantly more
aggressive chemical environments (other than powerful oxidizing
environments) and higher pressures than standard non-asbestos
gasket materials. Metal inserted materials are able to operate
at even higher pressures. In reducing environments, pure
graphite can handle up to 5000F.
Mercer carries Garlock, Thermoseal and Grafoil brands of carbon
and graphite based gasket materials. These materials are
available in thicknesses 1/32" through 1/4".
| Material |
Max T
(F) |
Max P
(psi) |
Creep Rel'n
(%) |
Applications/Features |
| Carbon or Graphite/Nitrile |
840 |
1900 |
20 |
Excellent for steam.
Excellent chemical resistance except powerful oxidizing
agents. |
| Carbon or
Graphite/SBR |
900 |
2000 |
14 |
Excellent
for steam. Excellent chemical resistance except powerful
oxidizing agents. |
| Pure Flexible Graphite |
950 |
2100 |
5 |
Excellent chemical
resistance except powerful oxidizing agents. Available
laminated or homogeneous. |
| Pure
Flexible Graphite - Metal Inserted |
950 |
2800 |
7 |
Excellent
chemical resistance except powerful oxidizing agents.
Available with 316 SS Foil, Mesh or Tang Core. Available
laminated or homogeneous. |
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Mercer fabricates solid or
jacketed gaskets from any metal in any thickness. Below is a
selection of the more popular metals and their performance
characteristics.
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| Material |
Max T
(F) |
Metals |
| Copper |
600 |
Excellent for steam.
Excellent chemical resistance except powerful oxidizing
agents. |
| Brass |
500 |
Excellent for steam. Excellent chemical resistance
except powerful oxidizing agents. |
| GHL |
212 |
Excellent chemical
resistance except powerful oxidizing agents. Available
laminated or homogeneous. |
| Grafoil ® |
800 |
Excellent chemical resistance except powerful oxidizing
agents. Available with 316 SS Foil, Mesh or Tang Core.
Available laminated or homogeneous. |
| Titanium |
1000 |
Similar strength to 300 series stainless, but tougher
and much less dense. Excellent resistance to chloride
solutions (sea water) and bleaching solutions. |
| Soft Iron, Low Carbon Steel |
1000 |
Soft. Will corrode in water. Mostly used where immersed
in liquid hydrocarbons. |
Stainless Steel,
Type 304 |
1000 |
A
general-purpose, soft, corrosion-resistant, non magnetic
stainless that will not harden under heat. |
Stainless Steel,
Type 316 |
1000 |
Not
as strong as 304, but more corrosion-resistant in
chemical solutions (except for a limited range of
oxiding acids) |
Stainless Steel,
Type 321 |
1600 |
Stronger than 304. Used when similar performance to 304
is needed at higher temperatures. |
Stainless Steel,
Type 347 |
1600 |
More corrosion-resistant and harder than 321. |
Stainless Steel,
Type 410 |
1200 |
Commonly referred to as “Chrome”. This stainless will
harden when heat-treated. It is highly magnetic, hard
and strong, but not very corrosion-resistant. |
Stainless Steel,
Type 430 |
1400 |
More corrosion-resistant than 410, but will not harden
when heat-treated. This stainless is soft and no
stronger than 300 series stainless. |
| Nickel |
1400 |
Exhibits good corrosion and erosion resistance at
moderate temperatures. |
| Monel® |
1500 |
A
family of nickel/copper alloys that offer greater
corrosion and erosion resistance than nickel alone.
Particularly useful in sea water applications. |
| Inconel® |
2000 |
A
family of nickel/chromium alloys that are non-magnetic
and take corrosion resistance to elevated temperatures. |
| Hastelloy® |
2000 |
A
family of Nickel/chromium/molybdenum alloys for use in
highly aggressive chemical environments at elevated
temper |
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Teflon®-based gasket materials
are able to withstand significantly more aggressive chemical
environments (including highly oxidizing environments) than
standard non-asbestos gasket materials. However their
temperature, pressure and mechanical performance is inferior
to standard non-asbestos gasket materials. Metal inserted
and expanded PTFE are able to operate at higher pressures.
Mercer carries Garlock, Thermoseal and Gore-Tex brands of
Teflon®-based gasket materials. These materials are available
in thicknesses 1/32" through 1/4".
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| Material |
Max T
(F) |
Max P
(psi) |
Creep Rel'n
(%) |
Applications/Features |
| Pure PTFE |
500 |
800 |
35
- 55 |
Excellent chemical
resistance. |
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Filled PTFE |
500 |
1200 |
11 - 40 |
Excellent chemical resistance.
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| Filled PTFE -
Metal Inserted |
500 |
2500 |
20 |
Excellent chemical
resistance. 316 SS perforated core. |
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Expanded PTFE |
600 |
3000 |
30 |
Excellent chemical resistance. Highly
compressible. |
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Mercer Gasket & Shim
Interstate Industrial Park & 110 Benigno Boulevard
Bellmawr, NJ 08031
ISO 9001:2000 certified
On call 24 hours!
(800) 210-5000
Fax: (856) 931-6400
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