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Flange Gasket Material Options
SG offers the following materials as Standard Rubber Flange Gasket options. Please see
Flange Gasket Standard Sizes for size options, and
Flange Gasket Prices & Discounts (Ring
and Full Face types) for current
pricing including substantial quantity breaks on over 5,000 standard material,
size and style configurations for pipe flanges from 1/2" through 48".
The EZ Inquiry pages contain illustrated summaries of
flange gasket options that can used for inquiries, quotations, ordering, or general reference.
For more detailed information on rubber compounds or elastomers, please see Chemical Resistance charts and Typical Properties of Common Commercial Elastomers.
|
Standard Material Options |
General Properties |
General Chemical Resistance |
|
Resistant to: |
Attacked by: |
|
Red Rubber (SBR) |
Good physical properties and
abrasion resistance. Poor resistance to petroleum-based fluids.
Common applications include water pipeline flange gaskets, plumbing washers. |
Most moderate chemicals, wet or
dry, organic acids, alcohols, ketones, aldehydes. |
Ozone, strong acids, fats, oils,
greases, most hydrocarbons. |
|
Neoprene |
Low cost option suitable for most
rubber flange gasket needs. Neoprene offers good weather resistance, flame
retardance, and moderate resistance to petroleum-based fluids.
Commonly used for water and air line seals, many other applications. |
Moderate chemicals and acids,
ozone, oils, fats, greases, many oils, and solvents. |
Strong oxidizing acids, esters,
ketones, chlorinated, aromatic and nitro hydrocarbons. |
|
High Grade
Neoprene1 |
Similar to above but with enhanced
physical properties like tensile strength, elongation, compression set.
Good choice for dynamic seals where more durable elasticity and strength are
important. |
|
EPDM |
Excellent ozone, chemical, and
aging resistance but poor resistance to petroleum-based fluids.
Economical choice where weather and chemical resistance are important
features. |
Animal and vegetable oils, ozone,
strong and oxidizing chemicals. |
Mineral oils and solvents,
aromatic hydrocarbons. |
|
Buna-N |
Excellent resistance to petroleum-based
fluids. Good physical properties. Economical choice for gaskets
and seals in gas engines and other equipment where petroleum-based oils,
lubricants, and fuels are present. |
Many hydrocarbons, fats, oils,
greases, hydraulic fluids, chemicals. |
Ozone (except PVC blends), ketones,
esters, aldehydes, chlorinated and nitro hydrocarbons. |
|
FDA
White Nitrile |
Similar to above, but made of FDA
approved materials suitable for food processing and serving equipment.
|
|
Silicone |
Excellent high and low temperature
properties. Fair physical properties. |
Moderate or oxidizing chemicals,
ozone, concentrated sodium hydroxide. |
Many solvents, oils, concentrated
acids, dilute sodium hydroxide. |
|
High Grade
Silicone1 |
Same as above only with enhanced
physical properties. |
|
Viton™
(Fluoro-elastomer) |
Excellent oil and air resistance
both at low and high temperatures. Very good chemical resistance. |
All aliphatic, aromatic and
halogenated hydrocarbons, acids, animal and vegetable oils. |
Ketones, low molecular weight
esters and nitro containing compounds. |
Notes
1. High Grade Neoprene and Silicone compounds are available in all standard
Standard Flange Gasket dimensions by quotation.
2. Most materials available in standard 50-70 durometer hardness (Shore A), with many semi-standard options from 30-90 durometer.
3. Availability on some options may vary.
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Materials
Orders, Inquiries, Customer Service: