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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. |
| |
| 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 |
150 |
1/32
to 1 |
Acids,
organic salts & alkalis. Non-toxic. Abrasion
resistant. Soft. |
Natural
(Pure Gum) |
-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. |
|
| |
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.
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